Rebuilding a 2JZ to See Why It's So Good
**Rebuilding a Legendary Engine: The 2JZ**
In this episode, we're diving into the world of Japanese sports cars and one of the most iconic engines out there - the 2JZ. This inline-six powerhouse is known for its robustness, reliability, and ability to produce massive horsepower. We've got our hands on a Supra with a 2JZ engine, and we're going to take it apart, put it back together, and learn why this engine is so legendary.
**The Turbo Lag Dilemma**
One of the biggest challenges when working with turbocharged engines is managing turbo lag - that's the delay between when you hit the gas and when the engine actually starts making power. In the case of our 2JZ, the factory opted to go with two smaller turbos instead of one big one to minimize lag. This allows for more control over power delivery and less lag at low speeds.
**The Intake Manifold: A Key Component**
When we removed the intake manifold assembly, it was in one piece, but on closer inspection, we realized that it's actually composed of two parts - the plenum and six individual runners. The plenum is where all the air gets drawn into, and then it separates down into six channels, which are the runners. These runners feed each cylinder with a precise amount of airflow, making this intake manifold a critical component in maximizing power output.
**Putting it All Back Together**
With our newfound knowledge of the 2JZ's inner workings, we're putting everything back together. We've installed the intake manifold, and now it's time to fire up the engine. We've primed the pump by spinning it backwards to fill it with oil, and now we're ready to spin it forwards and force that oil into all the places it needs to be.
**The Moment of Truth**
We've finally reached the moment of truth - are we going to hear that legendary 2JZ roar? As we fire up the engine, the turbos start making their presence known, and we're treated to a symphony of sound. We've done it! We've taken this iconic engine apart and put it back together, and in doing so, we've learned why the 2JZ is so beloved by enthusiasts.
**Special Thanks**
A huge shoutout to Kaiser Cars for loaning us this Supra, and to Redline JDM Motors for hooking us up with this 2JZ engine. If you want to see more engine teardowns like this, leave a comment down below, and don't forget to subscribe to our channel and follow us on Instagram at @donutmedia.
WEBVTTKind: captionsLanguage: enthis engine is the legendary 2JZ GTE one of the most famous engines of all time known for its power its reliability and its unwavering strength and it's inside one of the most iconic cars ever the Mark 4 Supra 2JZ has been swapped until literally everything why is that what makes this 30 year old engine so good and why are some people paying close to ten thousand dollars for it today we have a completely disassembled 2JZ and we're going to look at each of these parts piece by piece and examine what makes this engine so capable yeah and once we look at all the parts we're going to try to put them all back together and get this thing fired up on the engine stand hold on hold on hold on hold on hold on hold on what hold on hold on dude get out of my way I hate you uh no wish us luck yeah cross those fingers bud yeah turn us into a budget Mario boys yeah you think 2JZ this is probably the car you think of the mark IV Supra it came with the 2JZ and not only the 2JZ but the turbo version of the 2JZ the Big Daddy which is also the engine we have taken apart in the shop right now but the two Jay-Z under the hood of this car is making 700 horsepower now of course they've had to swap out a few parts but that's kind of the lower of these engines the 2JZ can make a bunch of horsepower this car and the 2JZ in general was birthed of the Japanese Gentleman's Agreement when they all agreed that all domestic cars should be capped at 276 horsepower and secretly met in a room we're like hey guys yeah we got a calm down yeah or else the government is going to regulate us and we don't want to have them regulate us so let's self rig exactly they're like it'd be better for us all if we just agreed to cap these things off at 276 right but Toyota decided to really make this thing beefed up so it could handle way more power than that so say someone wanted to modify their car it could handle more than 276 exactly like 700 horsepower exactly now these cars routinely sell for about a hundred thousand dollars in this spec crazy part of the reason why this car is so expensive is because what's under the hood the 2js Jay-Z baby yeah is a dream come true check it off the list man as fun as this is to drive and ride we need to get our hands a little dirty and figure out what makes that engine so good in front of us we have a completely disassembled 2JZ and at the heart of that 2JZ is this iron block unlike some engines which are made out of aluminum this is cast out of iron which is much stronger which kind of lead to the foundation of this entire engine and why it's so strong it's because of this iron block and this thing weighs a ton come on help me lift this sucker you got it Joby we're way stronger than I thought 123.33 pounds now one of the reasons why the sink has to be so strong is because inside it a bunch of little explosions got a little mini explosions the really cool combustions there is a scientific difference but you know explosions but explosion sounds better another aspect that can affect the strength and durability of an engine are these very strategically placed structural elements now these right here are also oil return holes but they also double as rigidity increasers and we have them right here here on the inside of the block as well look how thick those suckers are yeah that makes this block extremely extremely strong just like me another point to note on the 2JZ is that it has a closed deck cooling system and that just references how much materials left around the cylinder walls on a closed deck you've got a bunch of material all the way around the cylinder wall and that lends to robustness and strength so these can take a lot of power without cracking the cylinder walls now some of the 2JZ GT has that the non-turbo variants don't are these oil squirters now these do just what they say they squirt oil up at the piston and keeps your cylinder walls nice and lubricated so things don't wear out too quick speaking of squirters if you happen to squirt some oil onto your shirt now would be a great time to go hit a sale at donutmedia.com that's right we're clearing out the garage to make room for some new stuff so now's your chance to get some big discounts we got all logo tees under 20 bucks got a limited time poster and a few left over rare items and all orders over 15 bucks get a limited time sticker so go check out our garage sale this week only from today until March 31st donutmedia.com this thing is super robust and can take a whole bunch of horsepower which is kind of part of what these are famous for now we got to put a bunch of stuff in it yeah we have to take our bare bone block and start building onto it we got a lot to do and not a whole lot of time so let's get jamming all right so generally speaking when you're rebuilding an engine there's usually going to be some machine shop work involved like in our case we should really send the block and head out to a machine shop real quick and just get the mating Services skimmed basically take off all the old gasket material and to make sure we have two really nice flat mating surfaces so that everything seals up nicely but we don't have time for that so we're just gonna get things as clean as we can by hand and put it back together and it'll be totally fine to run in the engine stand but if we ever want to make a bunch of Power with this thing we might take it apart again yeah this is just like the trial run yeah that's right you have an idea of what we should put this GJ in leave a comment down below yeah I got plenty of ideas yeah all right now let's talk Metallurgy for a second this is the crankshaft from the 2JZ and it is forged you may have heard of forged Parts before it's basically a process where you squeeze the metal into its final shape and that tightens up the grain structure and makes for a much stronger and heavier finished product pretty much every crankshaft of all time is forged but they're not all built quite the same this is the one from the 2JZ and it's heavy it's robust and I want to see what it weighs so 60 pounds is the 2JZ GTE crankshaft for comparison I've got the crank from my RB here rb25 that is and you can tell just looking at it this doesn't look nearly as robust as the 2JZ piece just looks a little bit weaker four whoa so that's pretty significant yeah that's you do the math it just adds kind of to the lore of the 2JZ being a strong and robustly built engine the crankshaft is thick as hell how much horsepower can you put to that stock cranky thing stock crank I mean six 700 horsepower no problem and I'm sure there are guys running close to a thousand on stock cranks now one of the most important factors when it comes to the health of your rotating assembly that's your crank your rods your pistons and the block itself is this area right here these are your main bearings so your crank sits on top of that a layer of oil is in between that bearing and the crank itself and one thing that's unique with the 2J is that these are actually pretty thick the surface area that that crank is sitting on is a lot bigger compared to most engines and that's important because that means it can dissipate heat better and allows you to make more power just using stock components okay dropping her in yep great she's in we're almost done halfway there the way you tighten things down and the way you loosen them is very important you got to do them in sequence or you risk warping so right here we've got the factory service manual for the 2JZ and the factory service manual for any engine that you're rebuilding or working on in depth is very important in here you'll find all of the things that you need to know like torque specs and the sequence in which you torque things just any little thing that you have a question about you can usually find the answer in the FSM so I'm going to guide Jerry through the sequence with the correct amount of torques can you be my angle finder yeah I am being his angle finder when I'm close Okay 45 75 85 bbbb that looked like 90. all right so we got the main caps on next the stones the pieces so as you can see our 2J is an inline six engine and in like six engines are pretty cool because they're inherently balanced you basically have three sets of two Pistons operating at the same time so you got one and six you got two and five and you got three and four and because they operate like that you have a balance of your primary and secondary forces making this thing super smooth and also allowing this thing to rev really really high which is another reason this engine's so great okay piston number Uno Keystone number Uno okay which way did it go we should figure that out okay that doesn't that doesn't fit there but that's a one and this is a one two but you see these down okay compress me compress me Joe ready oh baby that don't go impress meme Pistons from the 2J can handle a whole bunch of horsepower up to 600 horsepower on stock Pistons which is pretty good there's a couple things that are really unique about this piston the first thing is that it has a special coating on the crown and on the skirt and that's to have better heat dissipation and better friction properties it also has this really cool little channel right here so we talked about the oil squirters earlier well oil squirts inside that hole and gets filled underneath the crown of the Piston cooling it even further and then also coating the cylinder when it falls back down just like the crankshaft these connecting rods are forged and these sayings are beefy as well beefy as hell yeah they're beefy they got a nice thick neck yeah which we're debating whether or not that's a term you can give a connecting rod and they also have again this nice wide surface area to give you a lot of heat dissipation through that bearings too yeah Force bearings on the rods are taking a lot of abuse if you look at these you can definitely see some wear uh generally speaking if you're at this point putting this Engine Back Together you'd replace these but again we're just putting this back together as it was and they'll be just fine oh daddy's ready with the goop whenever the groups so the 2JZ uses a standard crankshaft driven oil pump this is the oil pump and it's got this spline gear in here which mates up with the end of the crankshaft and whenever the crankshaft is spinning so is the oil pump which means it's constantly pumping oil if the engine's spinning which is what you need to keep from roaching all your bearings and things this is this is the heart of the engine really and Jerry there you go thank you sir gooped up for you gooped and ready to go now most oral pumps share a lot of similar design characteristics but it's how an engine manages that oil that makes it either good or bad okay I say oil all right people don't like the way I say it all right Jer you got her on there I got a positive Dow engagement okay that thing looks great okay we're about to lose some bolts hold on hold on hold on hold on hold on hold on what hold on hold on I don't want to no stop they'll fall out in order no they won't okay gerund okay that side this way and this way that side huh hands going on this is pretty beefy pan huh yeah this is another reason why this engine is so robust is because this engine oil pan slash girdle you want to call it that it ties the whole lower assembly and you see these ribs right here these are like structural reinforcements which keeps this engine from shifting side to side under load that's part of the reason why you can add a lot of power to this engine because it's reinforced on the bottom end thank you laced it right down the middle dad good stuff son another thing that makes the 2JZ so strong from the factory is the head gasket uses a multi-layer steel or MLS head gasket from the factory and that is what it sounds like just multiple layers of Steel that seal the engine block to the head and MLS head gaskets are very strong and they can withstand a lot of boost so it's another reason the 2J is so strong and robust from the factory so we're just going to install a new OEM One and call it good we got the head all cleaned up and now it's time to dump it on this nice new gasket that Joby put on yes oh thank you boom look at that beautiful so the 2J has a dual overhead cam set up with variable valve timing it's got four valves per cylinder two exhausts two intake and the way these valves work it's pretty interesting is a little bucket system the camshaft lobe presses down on that bucket it in turn pushes the valve down open close open close as that assembly rotates oh look at this Jay-Z right on there right on the stick or Z candy cane or Jeremiah Zach can't believe it's taken us this long today yeah we're so so it tells you how narcissistic we are that's right all right so we're gonna get some new washers nuts on our head studs torque those truckers down and then uh keep bolting things onto this dude we're like two seconds we're gonna be done yeah it's mostly an engine yeah can you get the hell out of my way hey dude you crank your bolts down so slow listen you're in my whole Space my name's Joe but I'm a slow cranker listen I'm a slow cranker my name's Joe listen I have the slowest cranker in all of America there's some paces and everything man it's just most of it oh see what happens when I try to crank quick that's quick dude get out of my way I hate you all right we're ready to install our intake valve gear here this system is pretty cool so this allows you to have a wider range of timing run through your intake camshaft so under more traditional setup where you just have a single camshaft the timing is always going to be the same no matter what but inside this gear is another series of gear that's controlled by oil pressure and depending on what RPM you're at and how much load is on the engine it'll vary the timing of your intake cam so when you're really romping on it it'll Advance the timing of the intake valves let air get into the cylinder faster so you can make more power as you get higher into the RPMs that intake valve or charge a little bit so there's no overlap you're making the most power and you're being pretty efficient so we can rotate this cam gear and not rotate the camshaft but that is our degree of rotation that's how much we can advance and our timing and as a result of this you can get an extra 60 foot pound the torque at lower RPMs just by being able to adjust your valve timing just that little bit but it makes all the difference stop it timing engine can seem scary because if you do it wrong you could grenade your engine but generally speaking there's always going to be a procedure for this type of thing and the manufacturer always makes it pretty easy to do because this is something that needs to be done well every time it's done it's pretty easy even though it's scary it is very scary this is the fun part I pull this pin and the hydraulic fluid is going to push on a piston that pushes on this that will keep tension on this belt here we go no no coming back from this fire in the hole can the editor do an explosion I'm gonna make a bit of a mess just so you know that's all right we got a guy who loves clean up messes That's My Boy Jimmy clean up on aisle 2JZ very important part of rebuilding any engine is priming it with oil and that basically means getting oil to all the bearings and all the parts that need lubrication before first startup so to do that here with the 2JZ I think it's going to be pretty easy we can spin the engine backwards suck oil down into the oil pump and force it into all the areas by hand before we ever start this thing up G starting to squirt a sweet little sound there here quick with it we are finally putting the turbos back on these little baby twins and these are pretty trick you got a lot of exhaust stuff going on here and there's a good reason for that down here we've got a flapper valve that at low RPMs is closed to try to force all the exhaust gases through one turbo the front turbo and that just helps it spool up because it's only trying to spool up one small turbo but then at higher RPMs that flapper opens and lets exhaust gas flow to both turbos so you can make more power and when you're at higher RPMs it's very easy to keep both turbos cooled up so it's a nice way to reduce turbo lag in the lower RPMs and increase power at the higher RPMs the impellers in here end up doing about 150 175 000 RPMs and that's to make boost but it takes a while to get them up to that speed so while you're waiting for them to come up to speed you're kind of down on Power and that's turbo lag so if we had one big turbo on here to make 276 horsepower from the factory it would lag a lot more so they opted to go with two little ones that they can kind of control to keep lag down at the low end and power up at the high end and you don't really see this kind of thing too much anymore we've made great strides in turbos ball bearing turbos spool up a lot quicker and we've just gotten better at getting turbos to make Power low down I got two turbos I paid for them both I want to use them both all day final thing we need to put on is our intake manifold now when we pulled this assembly off we did it in one big chunk but on the 2js actually composed of two parts you have your plenum right here which all the air gets drawn into and then it separates down into six individual channels which are your Runners so because the 2J is a six cylinder we got six Runners that go towards each cylinder also this is made of cast aluminum which is very durable and it can dissipate heat very well we're getting close buddy look at this whoa starting to look like something great work great work just fantastic best work what the hell come on Joe you gotta admit that looks pretty fun you got something wrong with your brain huh I'm having a pretty fun time doing this come on you're pouring oil in with the gadget I've never even seen in my life and with the intake manifold on the engine is pretty much all back together except for a few things and nearly ready to fire up having done all this it's pretty easy to see why the 2JZ is so legendary and iconic they come from a time when robustness and reliability were the Pinnacle and it's easy to see why they can make so much power because of how robust they are I mean a lot of cars today and engines are more based around economy and efficiency rather than power so I don't see the 2JZ getting any cheaper anytime soon and I think we've uh we've learned why so let's hear this thing Roar I think we did something wrong all right so as I was helping the boys out cleaning the bench found these two bolts right here hopefully these aren't too important all we can do now is keep our fingers crossed those are all bolts Jim you don't know them oh I know it did not come from yeah I really don't think everyone's worried although there is oil on top of them well it's very similar to the oil color that's pretty grimy but they're so small how important could they be uh this is gonna be fun no pressure you know just the whole office Joby Joby let's Prime this earlier we primed the pump by spinning it backwards to fill it with oil now we're going to spin it forwards and force all that oil into all the places it needs to be we're just moving oil okay clear yeah it's getting faster because it's lubing up less friction and less friction uh no no not a chance so you ready to fire this thing up yeah Adam you ready let's hear this here we go she wants it she wants it yeah she doesn't really know too all the air those turbos are making is just hitting me but heck we did it not only did we take this thing apart and put it back together but we learned why a 2JZ is so cool along the way and we got to drive a Supra want to thank Kaiser cars for loaning us this Supra check those guys out we'll leave a link in the description huge shout out to redline JDM motors for hooking us up with this 2JZ they've always got a lot of cool stuff in stock if you want to see us tear apart more engines leave a comment down below what you think we should do thank you guys so much for watching subscribe to the channel follow us on Instagram at donutmedia it's at Zach job at Jeremiah Burton we're different people bye see you guys next time good jobthis engine is the legendary 2JZ GTE one of the most famous engines of all time known for its power its reliability and its unwavering strength and it's inside one of the most iconic cars ever the Mark 4 Supra 2JZ has been swapped until literally everything why is that what makes this 30 year old engine so good and why are some people paying close to ten thousand dollars for it today we have a completely disassembled 2JZ and we're going to look at each of these parts piece by piece and examine what makes this engine so capable yeah and once we look at all the parts we're going to try to put them all back together and get this thing fired up on the engine stand hold on hold on hold on hold on hold on hold on what hold on hold on dude get out of my way I hate you uh no wish us luck yeah cross those fingers bud yeah turn us into a budget Mario boys yeah you think 2JZ this is probably the car you think of the mark IV Supra it came with the 2JZ and not only the 2JZ but the turbo version of the 2JZ the Big Daddy which is also the engine we have taken apart in the shop right now but the two Jay-Z under the hood of this car is making 700 horsepower now of course they've had to swap out a few parts but that's kind of the lower of these engines the 2JZ can make a bunch of horsepower this car and the 2JZ in general was birthed of the Japanese Gentleman's Agreement when they all agreed that all domestic cars should be capped at 276 horsepower and secretly met in a room we're like hey guys yeah we got a calm down yeah or else the government is going to regulate us and we don't want to have them regulate us so let's self rig exactly they're like it'd be better for us all if we just agreed to cap these things off at 276 right but Toyota decided to really make this thing beefed up so it could handle way more power than that so say someone wanted to modify their car it could handle more than 276 exactly like 700 horsepower exactly now these cars routinely sell for about a hundred thousand dollars in this spec crazy part of the reason why this car is so expensive is because what's under the hood the 2js Jay-Z baby yeah is a dream come true check it off the list man as fun as this is to drive and ride we need to get our hands a little dirty and figure out what makes that engine so good in front of us we have a completely disassembled 2JZ and at the heart of that 2JZ is this iron block unlike some engines which are made out of aluminum this is cast out of iron which is much stronger which kind of lead to the foundation of this entire engine and why it's so strong it's because of this iron block and this thing weighs a ton come on help me lift this sucker you got it Joby we're way stronger than I thought 123.33 pounds now one of the reasons why the sink has to be so strong is because inside it a bunch of little explosions got a little mini explosions the really cool combustions there is a scientific difference but you know explosions but explosion sounds better another aspect that can affect the strength and durability of an engine are these very strategically placed structural elements now these right here are also oil return holes but they also double as rigidity increasers and we have them right here here on the inside of the block as well look how thick those suckers are yeah that makes this block extremely extremely strong just like me another point to note on the 2JZ is that it has a closed deck cooling system and that just references how much materials left around the cylinder walls on a closed deck you've got a bunch of material all the way around the cylinder wall and that lends to robustness and strength so these can take a lot of power without cracking the cylinder walls now some of the 2JZ GT has that the non-turbo variants don't are these oil squirters now these do just what they say they squirt oil up at the piston and keeps your cylinder walls nice and lubricated so things don't wear out too quick speaking of squirters if you happen to squirt some oil onto your shirt now would be a great time to go hit a sale at donutmedia.com that's right we're clearing out the garage to make room for some new stuff so now's your chance to get some big discounts we got all logo tees under 20 bucks got a limited time poster and a few left over rare items and all orders over 15 bucks get a limited time sticker so go check out our garage sale this week only from today until March 31st donutmedia.com this thing is super robust and can take a whole bunch of horsepower which is kind of part of what these are famous for now we got to put a bunch of stuff in it yeah we have to take our bare bone block and start building onto it we got a lot to do and not a whole lot of time so let's get jamming all right so generally speaking when you're rebuilding an engine there's usually going to be some machine shop work involved like in our case we should really send the block and head out to a machine shop real quick and just get the mating Services skimmed basically take off all the old gasket material and to make sure we have two really nice flat mating surfaces so that everything seals up nicely but we don't have time for that so we're just gonna get things as clean as we can by hand and put it back together and it'll be totally fine to run in the engine stand but if we ever want to make a bunch of Power with this thing we might take it apart again yeah this is just like the trial run yeah that's right you have an idea of what we should put this GJ in leave a comment down below yeah I got plenty of ideas yeah all right now let's talk Metallurgy for a second this is the crankshaft from the 2JZ and it is forged you may have heard of forged Parts before it's basically a process where you squeeze the metal into its final shape and that tightens up the grain structure and makes for a much stronger and heavier finished product pretty much every crankshaft of all time is forged but they're not all built quite the same this is the one from the 2JZ and it's heavy it's robust and I want to see what it weighs so 60 pounds is the 2JZ GTE crankshaft for comparison I've got the crank from my RB here rb25 that is and you can tell just looking at it this doesn't look nearly as robust as the 2JZ piece just looks a little bit weaker four whoa so that's pretty significant yeah that's you do the math it just adds kind of to the lore of the 2JZ being a strong and robustly built engine the crankshaft is thick as hell how much horsepower can you put to that stock cranky thing stock crank I mean six 700 horsepower no problem and I'm sure there are guys running close to a thousand on stock cranks now one of the most important factors when it comes to the health of your rotating assembly that's your crank your rods your pistons and the block itself is this area right here these are your main bearings so your crank sits on top of that a layer of oil is in between that bearing and the crank itself and one thing that's unique with the 2J is that these are actually pretty thick the surface area that that crank is sitting on is a lot bigger compared to most engines and that's important because that means it can dissipate heat better and allows you to make more power just using stock components okay dropping her in yep great she's in we're almost done halfway there the way you tighten things down and the way you loosen them is very important you got to do them in sequence or you risk warping so right here we've got the factory service manual for the 2JZ and the factory service manual for any engine that you're rebuilding or working on in depth is very important in here you'll find all of the things that you need to know like torque specs and the sequence in which you torque things just any little thing that you have a question about you can usually find the answer in the FSM so I'm going to guide Jerry through the sequence with the correct amount of torques can you be my angle finder yeah I am being his angle finder when I'm close Okay 45 75 85 bbbb that looked like 90. all right so we got the main caps on next the stones the pieces so as you can see our 2J is an inline six engine and in like six engines are pretty cool because they're inherently balanced you basically have three sets of two Pistons operating at the same time so you got one and six you got two and five and you got three and four and because they operate like that you have a balance of your primary and secondary forces making this thing super smooth and also allowing this thing to rev really really high which is another reason this engine's so great okay piston number Uno Keystone number Uno okay which way did it go we should figure that out okay that doesn't that doesn't fit there but that's a one and this is a one two but you see these down okay compress me compress me Joe ready oh baby that don't go impress meme Pistons from the 2J can handle a whole bunch of horsepower up to 600 horsepower on stock Pistons which is pretty good there's a couple things that are really unique about this piston the first thing is that it has a special coating on the crown and on the skirt and that's to have better heat dissipation and better friction properties it also has this really cool little channel right here so we talked about the oil squirters earlier well oil squirts inside that hole and gets filled underneath the crown of the Piston cooling it even further and then also coating the cylinder when it falls back down just like the crankshaft these connecting rods are forged and these sayings are beefy as well beefy as hell yeah they're beefy they got a nice thick neck yeah which we're debating whether or not that's a term you can give a connecting rod and they also have again this nice wide surface area to give you a lot of heat dissipation through that bearings too yeah Force bearings on the rods are taking a lot of abuse if you look at these you can definitely see some wear uh generally speaking if you're at this point putting this Engine Back Together you'd replace these but again we're just putting this back together as it was and they'll be just fine oh daddy's ready with the goop whenever the groups so the 2JZ uses a standard crankshaft driven oil pump this is the oil pump and it's got this spline gear in here which mates up with the end of the crankshaft and whenever the crankshaft is spinning so is the oil pump which means it's constantly pumping oil if the engine's spinning which is what you need to keep from roaching all your bearings and things this is this is the heart of the engine really and Jerry there you go thank you sir gooped up for you gooped and ready to go now most oral pumps share a lot of similar design characteristics but it's how an engine manages that oil that makes it either good or bad okay I say oil all right people don't like the way I say it all right Jer you got her on there I got a positive Dow engagement okay that thing looks great okay we're about to lose some bolts hold on hold on hold on hold on hold on hold on what hold on hold on I don't want to no stop they'll fall out in order no they won't okay gerund okay that side this way and this way that side huh hands going on this is pretty beefy pan huh yeah this is another reason why this engine is so robust is because this engine oil pan slash girdle you want to call it that it ties the whole lower assembly and you see these ribs right here these are like structural reinforcements which keeps this engine from shifting side to side under load that's part of the reason why you can add a lot of power to this engine because it's reinforced on the bottom end thank you laced it right down the middle dad good stuff son another thing that makes the 2JZ so strong from the factory is the head gasket uses a multi-layer steel or MLS head gasket from the factory and that is what it sounds like just multiple layers of Steel that seal the engine block to the head and MLS head gaskets are very strong and they can withstand a lot of boost so it's another reason the 2J is so strong and robust from the factory so we're just going to install a new OEM One and call it good we got the head all cleaned up and now it's time to dump it on this nice new gasket that Joby put on yes oh thank you boom look at that beautiful so the 2J has a dual overhead cam set up with variable valve timing it's got four valves per cylinder two exhausts two intake and the way these valves work it's pretty interesting is a little bucket system the camshaft lobe presses down on that bucket it in turn pushes the valve down open close open close as that assembly rotates oh look at this Jay-Z right on there right on the stick or Z candy cane or Jeremiah Zach can't believe it's taken us this long today yeah we're so so it tells you how narcissistic we are that's right all right so we're gonna get some new washers nuts on our head studs torque those truckers down and then uh keep bolting things onto this dude we're like two seconds we're gonna be done yeah it's mostly an engine yeah can you get the hell out of my way hey dude you crank your bolts down so slow listen you're in my whole Space my name's Joe but I'm a slow cranker listen I'm a slow cranker my name's Joe listen I have the slowest cranker in all of America there's some paces and everything man it's just most of it oh see what happens when I try to crank quick that's quick dude get out of my way I hate you all right we're ready to install our intake valve gear here this system is pretty cool so this allows you to have a wider range of timing run through your intake camshaft so under more traditional setup where you just have a single camshaft the timing is always going to be the same no matter what but inside this gear is another series of gear that's controlled by oil pressure and depending on what RPM you're at and how much load is on the engine it'll vary the timing of your intake cam so when you're really romping on it it'll Advance the timing of the intake valves let air get into the cylinder faster so you can make more power as you get higher into the RPMs that intake valve or charge a little bit so there's no overlap you're making the most power and you're being pretty efficient so we can rotate this cam gear and not rotate the camshaft but that is our degree of rotation that's how much we can advance and our timing and as a result of this you can get an extra 60 foot pound the torque at lower RPMs just by being able to adjust your valve timing just that little bit but it makes all the difference stop it timing engine can seem scary because if you do it wrong you could grenade your engine but generally speaking there's always going to be a procedure for this type of thing and the manufacturer always makes it pretty easy to do because this is something that needs to be done well every time it's done it's pretty easy even though it's scary it is very scary this is the fun part I pull this pin and the hydraulic fluid is going to push on a piston that pushes on this that will keep tension on this belt here we go no no coming back from this fire in the hole can the editor do an explosion I'm gonna make a bit of a mess just so you know that's all right we got a guy who loves clean up messes That's My Boy Jimmy clean up on aisle 2JZ very important part of rebuilding any engine is priming it with oil and that basically means getting oil to all the bearings and all the parts that need lubrication before first startup so to do that here with the 2JZ I think it's going to be pretty easy we can spin the engine backwards suck oil down into the oil pump and force it into all the areas by hand before we ever start this thing up G starting to squirt a sweet little sound there here quick with it we are finally putting the turbos back on these little baby twins and these are pretty trick you got a lot of exhaust stuff going on here and there's a good reason for that down here we've got a flapper valve that at low RPMs is closed to try to force all the exhaust gases through one turbo the front turbo and that just helps it spool up because it's only trying to spool up one small turbo but then at higher RPMs that flapper opens and lets exhaust gas flow to both turbos so you can make more power and when you're at higher RPMs it's very easy to keep both turbos cooled up so it's a nice way to reduce turbo lag in the lower RPMs and increase power at the higher RPMs the impellers in here end up doing about 150 175 000 RPMs and that's to make boost but it takes a while to get them up to that speed so while you're waiting for them to come up to speed you're kind of down on Power and that's turbo lag so if we had one big turbo on here to make 276 horsepower from the factory it would lag a lot more so they opted to go with two little ones that they can kind of control to keep lag down at the low end and power up at the high end and you don't really see this kind of thing too much anymore we've made great strides in turbos ball bearing turbos spool up a lot quicker and we've just gotten better at getting turbos to make Power low down I got two turbos I paid for them both I want to use them both all day final thing we need to put on is our intake manifold now when we pulled this assembly off we did it in one big chunk but on the 2js actually composed of two parts you have your plenum right here which all the air gets drawn into and then it separates down into six individual channels which are your Runners so because the 2J is a six cylinder we got six Runners that go towards each cylinder also this is made of cast aluminum which is very durable and it can dissipate heat very well we're getting close buddy look at this whoa starting to look like something great work great work just fantastic best work what the hell come on Joe you gotta admit that looks pretty fun you got something wrong with your brain huh I'm having a pretty fun time doing this come on you're pouring oil in with the gadget I've never even seen in my life and with the intake manifold on the engine is pretty much all back together except for a few things and nearly ready to fire up having done all this it's pretty easy to see why the 2JZ is so legendary and iconic they come from a time when robustness and reliability were the Pinnacle and it's easy to see why they can make so much power because of how robust they are I mean a lot of cars today and engines are more based around economy and efficiency rather than power so I don't see the 2JZ getting any cheaper anytime soon and I think we've uh we've learned why so let's hear this thing Roar I think we did something wrong all right so as I was helping the boys out cleaning the bench found these two bolts right here hopefully these aren't too important all we can do now is keep our fingers crossed those are all bolts Jim you don't know them oh I know it did not come from yeah I really don't think everyone's worried although there is oil on top of them well it's very similar to the oil color that's pretty grimy but they're so small how important could they be uh this is gonna be fun no pressure you know just the whole office Joby Joby let's Prime this earlier we primed the pump by spinning it backwards to fill it with oil now we're going to spin it forwards and force all that oil into all the places it needs to be we're just moving oil okay clear yeah it's getting faster because it's lubing up less friction and less friction uh no no not a chance so you ready to fire this thing up yeah Adam you ready let's hear this here we go she wants it she wants it yeah she doesn't really know too all the air those turbos are making is just hitting me but heck we did it not only did we take this thing apart and put it back together but we learned why a 2JZ is so cool along the way and we got to drive a Supra want to thank Kaiser cars for loaning us this Supra check those guys out we'll leave a link in the description huge shout out to redline JDM motors for hooking us up with this 2JZ they've always got a lot of cool stuff in stock if you want to see us tear apart more engines leave a comment down below what you think we should do thank you guys so much for watching subscribe to the channel follow us on Instagram at donutmedia it's at Zach job at Jeremiah Burton we're different people bye see you guys next time good job