1jz or 3rz

hey my 3rz motor is pretty done with the 3rd cylinder isn’t working so I decided to do a 1jz vvti swap only question that I keep wondering is will it bolt up to the 4x4 tranny I have now I know people have done this swap with 2wd trucks

 

wat

No, it most certainly will not bolt in. Nothing about an engine swap is bolt in, even swapping to a 5VZ requires a massive amount of work. Bellhousing wise, I don't know if there was ever an A340F/W59 to 1JZ bellhousing. Maybe the 2TR will work since it uses the same bottom end design, but I am not sure, Bolting in the engine is just one aspect. You have to worry about integrating the original 1JZ ECU with the donor vehicle interior harness and vehicle harness. To maintain certain features in the truck that did not operate the same as the donor 1JZ, you need to integrate the 1JZ B-ECU and 3RZ B-ECU/ECU.

Engine perches are also in totally different places, so you will need to cut and re-weld those. If you even manage to find a bellhousing for 1JZ to A340F/W59, then you might even have to move it back to fit the longblock of the I6. There's a member on here who did a 2JZ swap, and he ended up using a JDM A650 transmission. His swap goes the over the course of two years and used a JDM 2JZ and a USDM 2JZ due to issues with the JDM block. His build goes over back to 2015/2016 and it's not even done yet. I can't remember his username for the life of me.

I see you're also in California, so you need all the original 1JZ donor vehicle's emissions systems or you will fail SMOG instantly. Once you verify all the original Emissions equipment is fully functional, you must bring it to a California BAR referee to get it approved.

If you're serious about this, then you need to buy a whole parts car. Buying every component you need individually will add up and be more hassle than its worth. You are basically hallowing the Tacoma out and transferring almost every single drivetrain, vacuum, fuel, electrical, and mechanical system out of the 1JZ donor car.

It's not easy man, you're looking at about a year of work if you know what you;re doing. The wiring will take you the longest. Identifying wires, re-pinning ECU's for integration with existing Tacoma infrastructure, welding, fabricating, etc are only a small piece of the equation.

 

Agreed. Its not plug and play, totally different engine as far as I know. IMO find a good used 3rz and swap it. Or rebuild yours. 1JZ swap would be cool but you better have a second vehicle, really deep pockets, and a lot of time to make it work.

 

I'm trying to learn Toyota speak so I can understand the wtf in op's idea...

3rz=4cyl
1jz=older straight 6 in supra and cressidas... right?!

If that's the case... why?!?!

I mean if you're gonna go that far wouldn't you just opt for the 2jz swap?! Help me understand folks.

 

I’d imagine 1jz’s are much less sought after therefore less expensive. Fitting an i6 in the engine bay will probably be tough tho. As to the why, because POWAHHH

 

The 1JZ is even harder to come by than the 2JZ. The 2JZ came on a significant amount of USDM Lexus cars, including the Lexus IS and ES lineup. The 1JZ, on the other hand only came predominantly in JDM and foreign Toyota vehicles obviously not found commonly in the United States.

There's a couple different variations of each engine, so depending on the revision there will be some differences in power and top end design. The standard 2JZ is a very common engine. The 2JZ-GTE is the creme-de-la-crop of Japanese I6 engines. That's the twin-turbocharged version found in Toyota Supras and Altezza/Crown.

 

Maybe the 1j-gte has more than a 2j-ge but na to na the 2j still makes more power. As to availability you’re probably right although in my area the is, gs, and sc 300’s are virtually non existent. I check at least once a month for a 6 speed is300 to no avail.

 

Correct. I was looking at the GTE figures.

 

I say just go ham and put a 1FZ-FE, it is the 2Js bigger and stronger brother haha. 4.5L, 7 main bearings, just a massive beast in its own right. Saw a 7 second BRZ that someone swapped one into (yup a land cruiser I6 engine in a BRZ)

 

How the hell do you fit that in a BRZ? Lol

 

With a huge shoehorn. They hold power really well because of the hugely reinforced crank pins and block. I'd love to turbo mine

https://youtu.be/3q1ZuQH4K4U

 

I didn’t mean direct bolt on I meant as in it won’t need too much modifications I’ve seen it done in mini trucks but 2wd I knew it would need different bell housings the only reason why I considered it was because it’s boosted already and For some reason about 500$ cheaper my plans were to boost the 3rz but then I ran into issues 238k motor then starting exploring a bit thanks anyways I think it’s safe to say I’ll maybe just rebuild the 3rz and boost

 

I wish they threw a third pedal in those US bound ones. I’m strongly considering an imported 5 speed hdj for my next vehicle.

 

You know, honestly I have zero desire for a manual in mine. I have the earlier electronic trans A442F (the one out of the hino busses) and it is a strong, competent trans. Zero complaints, and this from a guy who loves his manual Tacoma.

 

What do you use your truck for? Off roading a lot or mostly road?

Don't get me wrong, 1 or 1.5 haha or even 2 jz will certainly be more power and super cool nonetheless, but unless your truck is built for the speeds that go hand in hand from a high revving motor, you'd greatly benefit from a V8 UZ swap if looking for power. The motor is shorter so you don't have to cut the front end of your truck off like I did. Plus you can already find them prepackaged with 4x4 transmission setup from a 4runner (or Tundra depending on your smog limitations).
Just some food for thought if you're looking into swapping a different motor. W-series transmission will do okayish, but if you're going through the trouble with the fabrication I would highly suggest at looking into a different strong transmission from the get-go. If you have a Facebook, the supra truck group is a good source to look at too.