MKIII (1986.5-1992)

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Forum: MKIII (1986.5-1992)

For general discussion about topics relating to the MKIII.

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  1. For technical information about modifications/repairs to the MKIII.

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    1. Info regarding swapping the JZ-series engine into the A70 chassis.

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  2. For frequently asked questions about the MKIII.

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  1. Sticky Thread Sticky: Connector pins for 7m-GTE harness

    We need to start something here for the 7M harness like the JZ engines have. The connectors on the 7M are just as crusty. Anyways, I'm trying to find the connector and pin for the Oil sender for a 7m that I'm transplanting to my JZ, the connector and pin are in foul shape from the donor...

    Started by ZaZZn, 03-12-2017 09:28 PM
    • Replies: 6
    • Views: 683
    03-27-2017 09:57 AM Go to last post
  2. Sticky Thread Sticky: Your 1JZ-GTE And 2JZ-GTE Swap Guide For Dummies

    I have noticed a lot of the 1JZ information is not as accurate as it used to be. The common parts that are interchangeable with the 2JZ are the easy ones to find and we know they fit. In this thread I will list everything there is to know for us MKIII owners about doing a 1JZ-GTE and 2JZ-GTE Swap....

    Started by IBoughtASupra, 06-25-2013 10:09 PM
    2 Pages
    1 2
    • Replies: 29
    • Views: 43,773
    01-14-2017 07:29 PM Go to last post
  3. Sticky Thread Sticky: New To MKIII Section??? Rules, Info and Search Help Here.......

    I have edited and relocated some useful information to help alleviate some questions from new users. Please read below for basic information on how this forum operates and how to better access it. - Trey SEARCH HINTS/HELP- The Supraforums search feature can be very helpful in keeping the...

    Started by SupraTrey, 12-19-2012 03:43 PM
    • Replies: 1
    • Views: 12,708
    12-21-2012 04:05 AM Go to last post
  1. Auxiliary fans will not engage

    Hi guys, I recently bought a 1990 N/A Supra and I absolutely love getting under the hood and tinkering around with it. I'm not a mechanic but I'm not a newbie either. Here's my current issue. My electric auxiliary cooling fans never turn on. Not when the car heats up or when I use the AC....

    Started by plsmoothy, Yesterday 09:18 PM
    • Replies: 1
    • Views: 34
    Today 02:10 PM Go to last post
  2. Supra Kart

    *Disclaimer* Before everyone gets all butt hurt about a supra being cut up and how it should have been saved, just increasing my value, yada yada yada... The shell was rotted and was abut to be sent to be crushed. All the usable parts were sold to keep other supras on the road and I kept the...

    Started by Supra_Sundays, 06-21-2017 07:15 PM
    • Replies: 13
    • Views: 255
    Today 01:49 PM Go to last post
  3. Turbo Questions

    I am having some issues when I try to up the boost. The turbo I have is a Precision 6262 with a .58 A/R and am wondering if this is possibly my issue. Can anyone post what the approximate hp that turbo should product, or even what people have gotten to on similar set ups?

    Started by kmichaelokelly, 06-15-2017 08:53 AM
    2 Pages
    1 2
    • Replies: 25
    • Views: 384
    Today 01:49 PM Go to last post
  4. Why is is so hard to decide 2jz swap or built 7m

    Beating my head against the wall trying to make up my mind on whether I should liquidate all my 7m parts and motor and install a 2jzgte or just put a fresh built 7m back in. I got a 7m with a built head and bottom end and a good number of things to support it but not everything. But then I keep...

    Started by Mokusatsu, 04-29-2017 12:45 PM
    4 Pages
    1 2 3 4
    • Replies: 75
    • Views: 2,904
    Today 10:43 AM Go to last post
  5. Modifed OEM Fan Shroud for Increased cooling.

    I figured I would show how I modified my OEM MKIII fan shroud to be more efficient. Most cars have a fan shroud that pulls air across the entire radiator, but the factory one only pulls air from its clutch fan area which is only 3/4 of the radiator. This leaves 1/4 of wasted space in hopes that...

    Started by jamesmkiii, 09-02-2010 07:27 PM
    2 Pages
    1 2
    • Replies: 42
    • Views: 6,824
    Today 09:22 AM Go to last post
  6. Weird Supra Problem. Please help.

    So i have a 88 Turbo 7mgte and the other day i was driving it and it just died the power steering went out power brakes etc.. so i pulled over and let it sit for a bit when i went back to it it smelled of gas really bad and wouldn't start (it turned over but wouldn't start, took about 10-15 try's...

    Started by 88turbosupra88, Yesterday 07:51 PM
    • Replies: 4
    • Views: 63
    Today 07:39 AM Go to last post
  7. 88 supra - plourenco

    hi guys, i have this about a year now, and i've done to much work on it, but i've to much more to do. no more talk, i'll show you the photos.

    Started by plourenco, 11-22-2016 06:25 PM
    • Replies: 15
    • Views: 1,130
    Yesterday 07:21 PM Go to last post
  8. Coolant Bypass Tube Leak

    So I'm having a persistent issue with a leak on the coolant bypass tube where the tube bolts to the engine. I rebuild the engine last summer and it started to leak during the break-in, so I replaced the gasket this week and it's still leaking, so I don't think it's a gasket problem. I did notice...

    Started by jonnymkiii, Yesterday 06:41 PM
    • Replies: 0
    • Views: 35
    Yesterday 06:41 PM Go to last post
  9. Any Recommendations for a Rack & Pinion?

    Hello, I am currently going to be replacing my rack & pinion on my 87 Supra as it leaks and I have been without powersteering for years due to this. I wanted to go with a Napa re-manufactured unit but unfortunately they are discontinued. I have also heard of others having problems within a few...

    Started by plaaya69, 06-02-2017 07:20 PM
    • Replies: 7
    • Views: 204
    Yesterday 05:53 PM Go to last post
  10. Aem infinity tune for 7m

    Hi guys this weekend I'm finally getting my plug and play aem infinity installed by a good shop out in LI and tuned by a guy named Chris Kagan. Any pro tips on what I should be looking for out of this for those of you who are familiar with my build? What to expect? What to ask for? Not gonna lie,...

    Started by Joe1234, 06-20-2017 09:00 AM
    • Replies: 9
    • Views: 178
    06-21-2017 09:33 PM Go to last post
  11. 1JZ Misfire Issues

    Hello all, I am new to the forum and hopefully posting in the right place. I recently picked up a 1jz swapped 240sx and am having some misfire issues. It is a jzz30 ecu/loom and first gen 1jz. The swap is not "professional grade" as far as the wiring goes, but all powers are fused and it looks...

    Started by ChPolly, 05-25-2017 12:00 PM
    • Replies: 20
    • Views: 354
    06-21-2017 12:27 PM Go to last post
  12. 6spd Diff install

    decided the diff i had wasnt going to fill my needs any longer. i have been running the stock housing with a cusco RS LSD and a Jaws Gear 3.54 for a little over a year, and i have been really happy with it. But my new goals, i wanna go much faster. so time to upgrade. Errol At TPS is doing the...

    Started by 2jzMK3, 04-08-2010 12:37 PM
    5 Pages
    1 2 3 4 5
    • Replies: 101
    • Views: 16,309
    06-20-2017 08:00 PM Go to last post
  13. 89 7M-GE Catalytic converter replacement- help!

    So I have a completely stock 7M-GE still with it's original Cat and it's not working anymore. I want to replace it but I have no idea what goes into replacing them in this car (I'm a first time Supra owner). Is it a direct swap with a aftermarket one or do I have to buy new sensors? I thought about...

    Started by Awag1000, 06-17-2017 07:58 AM
    • Replies: 11
    • Views: 192
    06-19-2017 03:38 PM Go to last post
  14. Chris's 89 hardtop vvti build

    Whatsup everybody. Im Chris(I hate my username) for those who dont know me.Well, since facebook has stolen most of the forums glory lately....I thought Id try to pump some life back into this place and show my build. Im going to show you what Ive started with and where Im at with the car now, and...

    Started by telefender71, 06-13-2015 11:20 PM
    4 Pages
    1 2 3 4
    • Replies: 85
    • Views: 10,678
    06-19-2017 02:13 PM Go to last post
  15. 1987 mk3 supra 7mge swap to 2jzgte (aristo)

    I need help guys with the wiring so I call upon the gods of wiring to help me out In all i just need to know what i need to get and what to keep plus i have the w58 manual transmission.

    Started by LongHUNGLo, 06-19-2017 02:04 AM
    • Replies: 1
    • Views: 77
    06-19-2017 09:27 AM Go to last post
  16. Differentiating Head Gasket Leak vs Valve Cover leak

    1988 Supra 7MGE. Hello! I am in the process of replacing my starter and I've been contemplating for a long time now in checking/replacing Valve Cover Gaskets and Head Gasket/Retorque/etc. I just recently got a garage of my own. I've noticed oil leaking around my spark plugs, and I haven't...

    Started by NARFALICIOUS, 06-08-2017 03:16 PM
    • Replies: 5
    • Views: 149
    06-18-2017 06:09 PM Go to last post
  17. 3.0 v6 tdi swap

    Hey its been awhile since i'v been on here let alone worked on my supra. With my new job i have the funds and time to work on it. The past 3 years ive been swap i've been working on tdi engines swaps, with very successful results. I can make adapers no problem. Since i got this new job i planned on...

    Started by clonephoon, 06-12-2017 12:51 PM
    • Replies: 7
    • Views: 218
    06-17-2017 07:06 PM Go to last post
  18. Source for Parallel Flow A/C Condenser?

    Does anyone know of any sources for these anymore now that American Condenser/Vista Pro are gone (doesn't seem like United Systems is doing much with their back-catalog and nobody lists the 1039293 in stock any longer)? I can obviously still get a Denso 477-0136 or 477-0145, but I'm quite sure it...

    Started by Jeff Lange, 06-17-2017 02:18 PM
    • Replies: 0
    • Views: 58
    06-17-2017 02:18 PM Go to last post
  19. $125,000 for a mk3 supra....

    I don't even know what to say. So I'll just leave this here. https://lasvegas.craigslist.org/cto/6134744440.html :wtf:

    Started by ZaZZn, 05-24-2017 03:09 AM
    2 Pages
    1 2
    • Replies: 34
    • Views: 1,229
    06-17-2017 08:00 AM Go to last post
  20. spec stage 2+ or 3+ clutch

    looking for feedback on spec stage 2+(500tq rating) and 3+(620tq rating). I'm at 450tq with a 2jz swap and a r154 and want to get a full face disc for streetability, engagement and pedal feel. Would the pedal feel differ between the two? I know the stage two is near full working load which is why...

    Started by jesse_rc1991, 06-16-2017 07:23 PM
    • Replies: 3
    • Views: 81
    06-17-2017 06:45 AM Go to last post
  21. Oil Pressure Sending Unit Removal

    My oil pressure gauge was not working and per the TSRM, I tested the sending unit with a test bulb and found it was not blinking as it should. In fact, it would blink once when the engine was revved and after that it wouldn't send another signal until revved again. I purchased a replacement sensor...

    Started by brianboko, 06-16-2017 06:21 AM
    • Replies: 2
    • Views: 80
    06-16-2017 07:45 AM Go to last post
  22. 1jz harness swap questions 91 to 87

    Hey all, So I've been digging around for some info I just bought a 1jzgte vvti single turbo with ecu and harness out of a 91 supra and I'm transplanting it to my 87 I've seen that there are some differences in the chassis harness but no real info on engine please help me out any and all info is...

    Started by Twadecook, 06-15-2017 10:08 AM
    • Replies: 1
    • Views: 45
    06-15-2017 11:53 AM Go to last post
  23. The CORRECT catch can setup

    I was reading up on how to do a catch can setup for the 7m and everyone picks and chooses their own way. Some throw on breathers, some just simply connect the 2 covers together, some provide a vacuum source from the tb and cap the accordion nipple and vice versa. I wanted to keep the system as...

    Started by Joe1234, 06-14-2017 07:42 AM
    • Replies: 7
    • Views: 272
    06-14-2017 03:22 PM Go to last post
  24. swapping in mkIV diff

    has anyone ventured into swapping in a mkiV differential into the mkIII chassis i am very interested in this swap due to my v160 2jz powered mkIII AND LOOKING FOR A LOWER GEAR SET THAN THE 3.54 THROUGH JAWSGEAR any info would be much appricitiated! thanks matt

    Started by 2j1988supra, 12-29-2008 08:19 PM
    3 Pages
    1 2 3
    • Replies: 53
    • Views: 2,502
    06-14-2017 06:24 AM Go to last post
  25. Replaced PS pump, hard steer

    Heres the deal: 87 supra 7mgte auto Hasnt been on the road since Feb. Been fixing lots of different things, mainly the timing belt. Replaced PS pump with reman pump from autozone. New belt, nice and taut. Pulley spinning normally, no slips. Both idle-up vacuum lines connected. Bled it in...

    Started by giltheartist, 05-08-2017 12:01 PM
    • Replies: 24
    • Views: 509
    06-13-2017 11:35 AM Go to last post
  26. Hose line?

    Hey I'm putting a 7mgte motor in my 89 Supra turbo. And right above the oil filter theirs a metal line that comes down beside it ( towards the front). Does anyone one know where that line goes? Won't let me post a pic.

    Started by Nathan91, 05-30-2017 05:56 PM
    • Replies: 9
    • Views: 208
    06-13-2017 04:34 AM Go to last post
  27. Clutch Not Disengaging

    Hey guys, so I'm at my wit's end with this clutch problem. I left my '91 turbo (R154) sitting tarped for about a year, and I'm trying to get her back on the road. After firing it up and driving around the block, I noticed the tranny was getting harder and harder to get into gear. Now it won't go...

    Started by greendevil, 06-09-2017 03:49 PM
    • Replies: 2
    • Views: 93
    06-10-2017 07:52 PM Go to last post
  28. Brake booster check valve

    I have noticed a few times while slowing down that my brakes will occasionally sort of go limp and the pedal will go all the way to the floor before stopping. 90% of the time they're fine. I bled the brakes and there was very little air in the line, but that really didn't change anything. I was...

    Started by Xplodr, 06-10-2017 05:28 PM
    • Replies: 2
    • Views: 46
    06-10-2017 07:20 PM Go to last post
  29. Strange bottom end noise but not quite knocking...

    Hello all. I finally got my project supra running right and idling decently after a month of tinkering. Unfortunately, there is a strange noise that has appeared out of nowhere. Almost like a knocking but not quite the traditional engine knock sound I'm used to. Pretty concerned about it, thinking...

    Started by brianboko, 06-09-2017 06:51 PM
    • Replies: 4
    • Views: 150
    06-10-2017 12:19 PM Go to last post
  30. Heater Union

    Having a hard time removing the heater union. In trying to remove union from new head because it was in bad shape, it broke off. Used PB Blaster and liquid wrench along with a large Hansen #7 easyout, still will not budge.

    Started by RAB3, 06-06-2017 12:56 PM
    • Replies: 12
    • Views: 193
    06-09-2017 03:03 PM Go to last post
  31. Custom new age studs or quake mod and standard studs

    Hi all. I'm getting my parts together to build my 7m. I've got my main goodies all together. Now I'm a little stuck on studs. I've spoken to a couple machinists in my area as well as a guy in cali who has done 7ms and 2js along with a bunch of diesel drag/race competition motors. He's done some...

    Started by Joe1234, 06-05-2017 08:04 PM
    2 Pages
    1 2
    • Replies: 32
    • Views: 520
    06-09-2017 02:21 PM Go to last post
  32. Toyota Supra Mk3 - ALternator Issues

    Hi I have a 1987 Supra non turbo, the car was on the road before I parked it up for 2 years. I started to work on it again, jumped the car and it fired up the first time but battery was not holding the charge, overnight drain for a fully charged battery. I measured the Voltage from the...

    Started by alamn2, 06-09-2017 09:28 AM
    • Replies: 3
    • Views: 78
    06-09-2017 11:41 AM Go to last post
  33. Ma70 and mx83 diff interchangeable?

    My supras diff blew, Can i use the cressida diff or internals to fix mine? Btw my diff is open.

    Started by Germain, 06-07-2017 03:14 PM
    • Replies: 3
    • Views: 93
    06-08-2017 01:24 PM Go to last post
  34. Time for a T4 set up

    I'm looking for some more up-to-date information on 7M T4 manifolds. I'm wanting to make the switch to a T4/external waste gate set-up and want to hear your feedback on some good options for manifolds, DP, and Turbo options. Am I better off going with a cast log style T4 or one of the "eBay"...

    Started by Elibutton, 05-24-2017 07:03 PM
    • Replies: 23
    • Views: 520
    06-08-2017 10:26 AM Go to last post
  35. Missing cam dowel pin

    Does anyone know where to get a cam gear dowel pin? Somewhere between the machine shop and getting it home pin was lost.

    Started by RAB3, 06-04-2017 07:58 AM
    • Replies: 3
    • Views: 76
    06-06-2017 04:23 PM Go to last post

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