87 MkIII vs 89MkIII -- parts interchange

willblock · 11-20-2007, 12:37 AM

Hello

Having browsed and then searched the forums and FAQs and found occasional parts of answers to my question, here is the larger question.

Two MkIII Supras, an 89 non-turbo 5spd and an 87 non-turbo 5spd, other than obvious cosmetic and trim items, what parts are common between those two cars? The 87 would be a parts source for the 89.
For example, are the electrical system components interchangable, items such as wiring harnesses, computers, instrument panels and so on?
For example, are the rear end components interchangeable, such as the differential and ring and pinion? Are the rear gear ratios the same?

Are the brake components interchangeable, rotors, calipers, antilock items? Are the calipers interchangeable between ABS and non-ABS-equipped cars?

Are the shocks and struts interchangeable assuming both cars are identically equipped (TEMS vs non-TEMS)? How nasty would it be to transplant TEMS from one car to the other?
Are the transmissions interchangeable, with both cars being 5spd?

Are the engine blocks and heads interchangeable? How about injection and ignition system components such as injectors such as coils?

Perhaps a better question is to ask what is not interchangeable between those two cars, aside of the obvious cosmetic things such as bumper facias, tail lights and other exterior and interior trim items?

I should be able to answer many of these questions myself, given research resources. If you have links to threads or sites where I can answer these questions myself I will sure appreciate them! As you can guess, my local Toyota dealer parts people are not much interested in offering help of this kind; get them beyond their parts computer screens and fuggetaboutit. Add to that that the age of these cars means that parts and service people who used to know those MkIII cars well, have moved on.

Many thanks in advance!

Will

Chambers · 11-21-2007, 03:34 AM

Well I know that injectors and coil packs are inter-changeable but the NA cars do not have coil packs, they have a coil but thats it, the wire harness and ECU's are not compatible, unless the harness has been re-pinned but I haven't heard to much of that. I would say the harness and ECU are just about the biggest differences, and to my knowledge all mechanical components are identical such as heads and blocks. The trannys are the same, W58. I think the rears have the same ratios but I could be wrong, and they are inter-changeable as well.
As for the exterior components, they are all interchangeable as well. Hope this helped.

willblock · 11-22-2007, 12:31 AM

Much appreciated, Chambers!

Your information is a good start indeed.

Will

supramacist · 11-22-2007, 01:36 AM

Yep it's 87 through 89 and 90 through 92.

Anything before 87 maight be a waste alltogether.
Hard to say. The 86 and 86.5 debacle seems prominent before 87.

Chambers · 11-22-2007, 06:08 AM

Quote:

Originally Posted by supramacist

Anything before 87 maight be a waste alltogether.
Hard to say. The 86 and 86.5 debacle seems prominent before 87.

Come on now, it's not that bad. lol!!

By the way, no prob on the help!

garedog · 07-24-2016, 06:27 PM

i have a 86.5 with a great body but bad engine. The plan is to take the engine and drive trane from my wrecked 89 and put it in the 86.5 with the good body. I pretty sure it will all work. I may have to swap out harrnesses but just did that with my 3.4 swaped 4runner.

11-20-2007, 12:37 AM	#1
willblock Stock Join Date: Nov 2007 Location: Ohio Posts: 2	87 MkIII vs 89MkIII -- parts interchange Hello Having browsed and then searched the forums and FAQs and found occasional parts of answers to my question, here is the larger question. Two MkIII Supras, an 89 non-turbo 5spd and an 87 non-turbo 5spd, other than obvious cosmetic and trim items, what parts are common between those two cars? The 87 would be a parts source for the 89. For example, are the electrical system components interchangable, items such as wiring harnesses, computers, instrument panels and so on? For example, are the rear end components interchangeable, such as the differential and ring and pinion? Are the rear gear ratios the same? Are the brake components interchangeable, rotors, calipers, antilock items? Are the calipers interchangeable between ABS and non-ABS-equipped cars? Are the shocks and struts interchangeable assuming both cars are identically equipped (TEMS vs non-TEMS)? How nasty would it be to transplant TEMS from one car to the other? Are the transmissions interchangeable, with both cars being 5spd? Are the engine blocks and heads interchangeable? How about injection and ignition system components such as injectors such as coils? Perhaps a better question is to ask what is not interchangeable between those two cars, aside of the obvious cosmetic things such as bumper facias, tail lights and other exterior and interior trim items? I should be able to answer many of these questions myself, given research resources. If you have links to threads or sites where I can answer these questions myself I will sure appreciate them! As you can guess, my local Toyota dealer parts people are not much interested in offering help of this kind; get them beyond their parts computer screens and fuggetaboutit. Add to that that the age of these cars means that parts and service people who used to know those MkIII cars well, have moved on. Many thanks in advance! Will

11-21-2007, 03:34 AM	#2
Chambers walbro fp Join Date: May 2007 Location: USA - Harford County, Maryland Posts: 481	Well I know that injectors and coil packs are inter-changeable but the NA cars do not have coil packs, they have a coil but thats it, the wire harness and ECU's are not compatible, unless the harness has been re-pinned but I haven't heard to much of that. I would say the harness and ECU are just about the biggest differences, and to my knowledge all mechanical components are identical such as heads and blocks. The trannys are the same, W58. I think the rears have the same ratios but I could be wrong, and they are inter-changeable as well. As for the exterior components, they are all interchangeable as well. Hope this helped. __________________ Whats in the garage, well.... in the yard. 1986.5 Toyota Supra - NA - 5 spd 1986 Ford Ranger Lowrider - 5 spd 1984 Ford Ranger XLT - 7" Lift - 4X4 - Auto "Stuck in the 80's" Last edited by Chambers; 11-21-2007 at 03:41 AM.

07-24-2016, 06:27 PM	#6
garedog Stock Join Date: Jul 2016 Location: Elmira Heights NY Posts: 1	what about 86.5 to 89? i have a 86.5 with a great body but bad engine. The plan is to take the engine and drive trane from my wrecked 89 and put it in the 86.5 with the good body. I pretty sure it will all work. I may have to swap out harrnesses but just did that with my 3.4 swaped 4runner.

11-22-2007, 12:31 AM	#3
willblock Stock Join Date: Nov 2007 Location: Ohio Posts: 2	Much appreciated, Chambers! Your information is a good start indeed. Will

11-22-2007, 01:36 AM	#4
supramacist 1000whp postwhore Join Date: Apr 2007 Location: Escape from the Prison Planet Posts: 1,356	Yep it's 87 through 89 and 90 through 92. Anything before 87 maight be a waste alltogether. Hard to say. The 86 and 86.5 debacle seems prominent before 87.