My 1JZ swap. Help appreciated

[Radioactive]

Well Ive decided to finally take the plunge and fix up my Supra. Im looking for advice from others here who have done this type of swap.

Basically the story on my car is that my Uncle bought it brand new off back in the 80's. He drove it everywhere, including across the country twice. Eventually he moved on to more luxury styling with a Mercedes, and tried to sell his car. It basically sat for a year or two, and I finally got lucky enough to convince him to pass it on to me(Well really I offered to buy it, but he refused). Long story short I blew the head gasket, and then shortly there after blew the motor(spun a bearing. Typical 7m.)

So the car is a 1988 5 speed 7mge NA. I had tossed around the idea of wimping out and going 7m na-T since the NA engines are pretty cheap and easy to come by. But I decided that if I do this, Im going to do it right, and to me that means the 1jz is the way to go. 2jz is great and all, but I cant really afford one, and I think the 1jz is more than ample. Im not looking for insane numbers, just enough power to eat all the hondas around here for breakfast. And maybe a mustang or two.

So Ive lined up a JDM 1jz-gtte from a reputable online retailer. Rear sump, ECU, Wiring harness and r154 attached.
Im planning on buying a cheap 'upgraded' downpipe since one isnt included.

As far as the actual swap, I figure it is pretty strait forward. I have room inthe garage to do it, and am fairly mechanically inclined. Im working on getting the engine mounts and all that since it is an 88.

Ive read as much as I can on here about the swap, but one question I havnt seen answered is the intercooler. Can you use the intercooler from a 7mgte on the 1jz? I figure all the pipes would have to be replaced since the systems are different, but Im curious if the actual unit itself can be used.

What about the pre-turbo air intake? Can you also use the 7mgte set up and reroute it a bit?

Since my car has the w58 and Im switching over to the r154, is there anything I should know about fitments? What about drive shaft?

Are there any major things I should do to the engine before I drop it in, other than the necessary swaps like removing the hydro fan. Im thinking timing belt is probably pretty easy off the car, but what about any gaskets? Im also planning on adding the stuff to use the 7m oil sender.

Also, since mine is an 88 na, do I have to find a different cluster? Or could I run the stock cluster and put a turbo gauge somewhere?

Ill admit Ive never attempted anything like this before, and am excited to tackle it. Im sure I will have plenty of other questions as I go along this fun journey to getting this car running. Sorry I already asked so much, and thanks for the help in advance.

 

[mk3tattoos]

driftmotions.com will have almost everything you will need, fittings for the 7m oil sender, rear and front main seall, mkiv water pump, ect.

 

[IBoughtASupra]

Well Ive decided to finally take the plunge and fix up my Supra. Im looking for advice from others here who have done this type of swap.

Basically the story on my car is that my Uncle bought it brand new off back in the 80's. He drove it everywhere, including across the country twice. Eventually he moved on to more luxury styling with a Mercedes, and tried to sell his car. It basically sat for a year or two, and I finally got lucky enough to convince him to pass it on to me(Well really I offered to buy it, but he refused). Long story short I blew the head gasket, and then shortly there after blew the motor(spun a bearing. Typical 7m.)

So the car is a 1988 5 speed 7mge NA. I had tossed around the idea of wimping out and going 7m na-T since the NA engines are pretty cheap and easy to come by. But I decided that if I do this, Im going to do it right, and to me that means the 1jz is the way to go. 2jz is great and all, but I cant really afford one, and I think the 1jz is more than ample. Im not looking for insane numbers, just enough power to eat all the hondas around here for breakfast. And maybe a mustang or two.

So Ive lined up a JDM 1jz-gtte from a reputable online retailer. Rear sump, ECU, Wiring harness and r154 attached.
Im planning on buying a cheap 'upgraded' downpipe since one isnt included.

As far as the actual swap, I figure it is pretty strait forward. I have room inthe garage to do it, and am fairly mechanically inclined. Im working on getting the engine mounts and all that since it is an 88.

Ive read as much as I can on here about the swap, but one question I havnt seen answered is the intercooler. Can you use the intercooler from a 7mgte on the 1jz? I figure all the pipes would have to be replaced since the systems are different, but Im curious if the actual unit itself can be used.

What about the pre-turbo air intake? Can you also use the 7mgte set up and reroute it a bit?

Since my car has the w58 and Im switching over to the r154, is there anything I should know about fitments? What about drive shaft?

Are there any major things I should do to the engine before I drop it in, other than the necessary swaps like removing the hydro fan. Im thinking timing belt is probably pretty easy off the car, but what about any gaskets? Im also planning on adding the stuff to use the 7m oil sender.

Also, since mine is an 88 na, do I have to find a different cluster? Or could I run the stock cluster and put a turbo gauge somewhere?

Ill admit Ive never attempted anything like this before, and am excited to tackle it. Im sure I will have plenty of other questions as I go along this fun journey to getting this car running. Sorry I already asked so much, and thanks for the help in advance.

1) You will need a 1JZ intercooler piping. If you wants, I have a stock one with piping. PM for a price.

2) You just need to put a filter on the intake of the turbo. Nothing else, it does use a hose similar to the 7M's accordion hose.

3) You will need a R154 driveshaft and crossmember to mount up the gearbox.

4) You should:

•Install MKIV TT water pump and Thermostat

•Timing service with cam and crank seals

•Drop the oil pan and check for shaving in the pan, reseal with Toyota FIPG(Form In Place Gasket)

•Valve Cover Gaskets(Optional)

•MKIV TT Oil Pump (Optional)

•You will need a turbo tach. You can follow a write up if you have good soldering skills but getting a turbo tach or turbo cluster is easier. Since your car is an 88, you might want the upgraded look, so getting an 89+ turbo cluster would be a better option.

Do the following things, report back with the results after dropping the pan. If you are not sure about anything, ask first and don't listen to a noon with two posts. Also, that doesn't mean a person with 1000 post is smarter but when you read a user's post, you can tell if they know what they are talking about.

DriftMotion is a good place to get everything you need. They beat everyone's price and can price match. I have bought over 10,000 dollars worth of Supra parts from them and not knock offs either, I don't use knockoffs. I have bought parts for my 7M, 1JZ and 2JZ.

I am currently rebuilding a blown head gasket 1JZ I bought from a member on here and I suggest you buy their 1JZ gasket kit. You won't be using the headgasket, valve seals and exhaust gaskets but everything else in that kit makes sense to replace.

 

[te72]

Basically, look at it this way:

Replace EVERYTHING that you don't want to replace when the engine is IN the car. I've replaced a couple coolant lines for the turbos in the car, because I neglected to replace them when we were reassembling the engine, and that wasn't all that fun. Not horrible, but not fun. That downpipe/y-pipe replacement? I did that in the car. I will NOT do that again, even if the end result is worth it.

If I were doing it again, I'd do the same thing I did this time around. Buy the gasket kit from DM, tear the engine down and clean it all up, replace all the seals, and reassemble. I had my head ported/polished and put BC264 cams in it while all this was taking place, and I don't regret that at all. Car makes ~320whp at 12psi, for what it's worth. Needless to say, I don't worry about Hondas or Mustangs often enough to care.

Another thing you might consider, if you're going to be running an aftermarket oil pressure gauge, is to put the that on before you drop the engine in. Much easier that way rather than having to move your a/c compressor out of the way and snake your arm up to the side of the block...

As for your questions, the stock intake piping on the 1j is fairly similar to what the n/a 7m used, oddly enough. Just no afm or resonator on the 1j hose. The intercooler would be easier to route piping if you have an IC that has in/out ports on opposite sides, but I've seen it done with the stock 7m IC too. Stock 1j intercooler *is* a bit bigger than the 7m unit though, and you'll need to relocate the stock oil cooler if you want to still use it. Honestly though, if you still want an oil cooler, I'd just go with an aftermarket unit.

Oh, and IBoughtASupra, I believe the oil pump on the JZ engines is the same, am I mistaken?

 

[Radioactive]

First, thanks for all the information. I went ahead and bout the engine today, and supposedly it is on the way to me! Pretty excited.

I'll go ahead and buy the gasket kit and plan on doing that. I figured it was worth doing while it was out of the car. I should probably go ahead and replace all the coolant lines as well while it is out, and I was planning on the oil sending modification pre-install.

I think my r154 comes with the cross member, but I have to wait for it to arrive to be 100% sure.

Im ordering a lot of parts this week, hoping they all come in around the same time so I can get this build going.

 

[IBoughtASupra]

First, thanks for all the information. I went ahead and bout the engine today, and supposedly it is on the way to me! Pretty excited.

I'll go ahead and buy the gasket kit and plan on doing that. I figured it was worth doing while it was out of the car. I should probably go ahead and replace all the coolant lines as well while it is out, and I was planning on the oil sending modification pre-install.

I think my r154 comes with the cross member, but I have to wait for it to arrive to be 100% sure.

Im ordering a lot of parts this week, hoping they all come in around the same time so I can get this build going.

Smart choice on the gasket kit.

When you receive the engine, look it over and take your time checking it. Don't sign for it if you see anything broken because then the seller will have an excuse saying you "accepted" it.

You can get the oil line from DriftMotion to use the stock gauge but I rather an AEM one. DriftMotion has both lines, one for a 7M sender or a 1/8th (Most Brands) sensor. You can use the stock sender for now to let you know about you oil pressure and upgrade later on.

Replace all the coolant lines as well. You can take them to you local auto parts store and match something up but usually buying long pieces can help avoid those bends. You will see once you start doing the replacements.

Make a build thread and ask about anything you don't get. If you need a crossmember, let me know.

 

[te72]

And, I feel obligated to say... take your time. I spent 8 months (mostly due to schedule conflicts between myself and the shop we built it at) between the teardown, build, and reassembly. The end result was very much worth it though.

Oh, and while you're checking things out, I'd double check the TPS (actually take the cover off) and see if it's still in one piece. Mine was busted when I got it, but other than that, the only issue we ran into was the ISCV sticking (common issue on 1j's it seems).

 

[Radioactive]

I will take my time, but I am hoping it will be a bit sooner than 8 months. I dont think Im quite that patient...

I just spent $600 at Driftmotion. Ouch. Lots of parts coming though. Wish it wasnt so dang expensive to do the swap so I could put some money into performance instead. Right now It'll probably be bone stock for at least the first few months, maybe even the first year.

 

[IBoughtASupra]

Take your time. We all creeped before we walked...

 

[Supraman0858]

Yeah bro take your time and do it right. Im still working on my 1jz swap an its been a year now mainly because I really dont have the time due to working and gathering up parts but all mine lack is the harness which was hacked to peices. And a word of advice if you dont know anything about extending your harness to the correct lenght dont try. Send it to Dr. Tweak and its done thats where I'm sending my harness so it can get done right. Have fun and good luck with your swap. Trust me the outcome will be well worth the $$$$$ which your not going to stop spending because there's always something else you can do to improve to have more fun..... Good Luck.

 

[te72]

I've been on the same setup for over a year now, and it's still fun. Have yet to lose to anyone who revved at me. Only two races I lost were planned things, and both those were significantly bigger turbo'd cars.

 

[IBoughtASupra]

IBoughtASupra, I believe the oil pump on the JZ engines is the same, am I mistaken?

You are correct, I was just stating that it is from the GTE. Both should run the same oil pump but I have called some Toyota dealers and said, "I need a 2JZ-GTE oil pump," and I get "What year and model?"

So I just stated it was from the MKIV TT just for reference, but DriftMotion has them for a cheaper price that what you would get it from the dealer as a normal customer.