2JZ-GE Engine

[Guest Roger NE]

I'm a Mk3 Supra owner, but I'm on here for help and advice as I'm putting a Mk4 engine (2JZ-GE) in my car to replace the rather unreliable 7M-GE. These two non-turbo engines are remarkably similar looking, unlike the turbo versions of both - they have distributors, and similar intakes and Y-pipes. Even the engine-driven Fan looks like it will fit.

 

Another advantage is that the NA Mk3 also uses the W58 gearbox (but with a slightly shorter gearshift extension)

 

This is not a hobby or project car, it's my daily driver - I'm just trying to do this engine transplant as cheaply as possible to keep it reliable and looking like stock.

 

One question I have about the engines - is it true that the standard 2JZ-GE is NOT an "Interference Engine", ie there will be no damage if the Cam Belt breaks . . . unlike the later VVTI version which IS an Interference Engine? (I vowed years ago to never have an Interference Engine!)

 

I'm pretty sure the engine I've been offered is the earlier type, but what year did they change . . . and how can you tell?

 

I may have other queries I hope you guys can help with as this gets under way, but I'm having trouble finding a Mk4 W58 Bellhousing to make it fit my gearbox. I've posted an an in the Wanted section, but maybe somebody has a spare gearbox but will sell me their Bellhousing (as that part isn't going to go wrong!)

[Benjy]

They didn't make a VVTi GE bud.

[Al Massey]

They didn't make a VVTi GE bud.

 

Yes they did mate.

[David P]

They didn't make a VVTi GE bud.

 

Yes they did, but didn't use it in a Supra.

[Al Massey]

Yes they did, but didn't use it in a Supra.

 

They did. The facelift import models.

 

It's on the supra differences chart on this forum.

[David P]

It looks like it's possible to be both right and wrong.

[JasonR24]

They did. The facelift import models.

 

It's on the supra differences chart on this forum.

 

This. I've seen a supra with the vvti non turbo engine. There was one for sale on eBay not too long ago.

[Dnk]

GS300's had them

[safcdixon]

You might be better going for the 1jz in your mkiii dude iirc some mkiii's had the 1jz in them anyway so the swap would be easier you would imagine not to mention you could get a tt one for well under a grand and would be alot more powerful and equally as moddable as the 2jz

[Swampy442]

I thought the GE variant of the 7M was bomb proof, only the GTEs had issues?

[straightsix]

GS300's had them

 

....and IS300

[trebor69]

Yes the 2jz-ge are "non interference"

[Guest Roger NE]

Thanks for the info guys . . . yes I've seen Mk4 N/A Supras with the VVTI engine, which is why I asked the question

 

And no, I'm definitely fitting a 2JZ-GE . . . . firstly because I hate turbochargers (it's why I bought my N/A Supra 14 years ago when I could just as easily bought a Turbo one!) . . . but also because the 2JZ-GE seems a really reliable engine. They seem to practically never have head gasket or big end failures . . . unlike the 7M-GE I am replacing, which frequently suffer both due to design flaws! (sure, not as often as the GTE, but they still do)

 

And actually, one of the reasons a 2JZ swap is fairly straightforward is because some of the later Jap market Mk3s used the 1JZ engine . . . so you can use those engine mounting brackets on the 2JZ

Edited August 16, 2013 by Roger NE (see edit history)

[Guest FLZ_Boy]

The 1998 USDM NA Supra used the 2JZ-GE VVTi, but they were only available as an automatic.

[Swampy442]

Again, I thought those problems were strictly limited to messed about with 7M-GTEs?

 

They seem to practically never have head gasket or big end failures . . . unlike the 7M-GE I am replacing, which frequently suffer both due to design flaws!

[Guest Roger NE]

Sadly no . . . . even stock 7M-GE and 7M-GTE engines suffer with both Head Gasket failure and Big End failure . . . . . of course, when you "mess about" and start upping the boost on the Turbo engines, they are even more likely to fail.

 

But I've had my N/A Mk3 for 14 years, and had 4 different engines in it ! That's why I want to now fir a 2JZ-GE as they seem SO much more reliable !

[Chris Wilson]

The late MKIII's for the Jap market came with a 1JZ-GTE engine from the factory, if you found a wrecked one it would make a swap very easy.

[Guest Roger NE]

It wouldn't actually ! The only parts that would be of any use would be the engine mounting brackets! I wouldn't use any other parts.

 

The 2JZ-GE is far more similar to my 7M-GE than the 1JZ-GTE is . . . it has a distributor, similar intake system, Engine-driven Viscous Fan, etc etc . . . . and for example those Jap Market Mk3 Supras used the R154 gearbox, whereas I have a W58 (so need a Mk4 Supra Bellhousing)

Edited August 18, 2013 by Roger NE (see edit history)

[David P]

It wouldn't actually ! The only parts that would be of any use would be the engine mounting brackets! I wouldn't use any other parts.

 

The 2JZ-GE is far more similar to my 7M-GE than the 1JZ-GTE is . . . and for example those Jap Market Mk3 Supras used the R154 gearbox, whereas I have a W58 (so need a Mk4 Supra Bellhousing)

 

With this kind of swappery, you'll find that "similar" is just as different as 'different', it depends more on if you want to swap in 200 or 300 bhpftlb?

Edited August 18, 2013 by David P (see edit history)

[Guest Roger NE]

How do you mean?!

 

As far as I'm concerned the main issue is physical similarity of the parts, so they all mate up OK . . . and in that respect the 2JZ-GE is very similar to the 7M-GE I am replacing - as you can see in the pics below

 

I've done a lot of research into this swap, and almost all the hoses, fuel line, aircon etc all just mates up, as well as the fan, Air Intake . . . they both have a twin exhaust downpipe . . . plus they both use the W58 gearbox.

 

http://www.wessexprod.demon.co.uk/supra/2JZ-GE.jpg http://www.wessexprod.demon.co.uk/supra/7M-GE.jpg

Edited August 18, 2013 by Roger NE (see edit history)

[David P]

It'd be no more work swapping in either 2J, 1J, GE or GTE.

[Guest Roger NE]

With respect I believe it would ! (having spoken to several people who've done those swaps)

[David P]

Each would be a different job, yet the difference in amount of work would be swings or roundabouts.

Edited August 18, 2013 by David P (see edit history)

[Guest Roger NE]

Well it seems that there are LOTS of additional issues with swapping a 7M-GTE with a 2JZ-GTE . . . far less issues or specialist parts required to be made or adapted with the swap I'm doing . . . so it's simpler and also much cheaper . . . that's the point I'm making. Most of it is just bolt on, plug and play.

 

I also want to keep the car looking a Stock as possible, ie original Air Intake, Fan etc etc, and it WILL after this transplant.

 

Out of interest, can someone tell me - what does 2JZ-GE look like UNDER the plastic cover on top of the Cam Covers? Is it similar to the 7M-GE ? (as in the pics below)

 

And here's another question . . . do you guys remove the EGR system from the 2JZ? Most of us do with the 7M . . it seems to have NO benefits, and several disadvantages (like adding extra heat on the back of the cylinder head where the EGR Cooler is bolted)

Edited August 18, 2013 by Roger NE (see edit history)

[The Raven]

More or less the same as yours