Flywheel fitment headache - MR2 Owners Club Message Board
 
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post #1 of 9 (permalink) Old April 1st, 2019, 01:15 Thread Starter
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Flywheel fitment headache

Hi from singapore, first post here after doing much research from many different sources..

So here’s my problem..
I am working on a sw20 mr2. Manufactured in 1990 resgistered in 1991. Chassis number states that it’s a NA, but turbo engine is in the car. I’m not confident that previous owner swapped the entire engine to a 3sgte, but more about that later.

It came with a stage 4 clutch, really tough to drive. Owner wants to replace it with a softer one. So i ordered a exedy clutch kit and a lightened flywheel.

Flywheel link:
https://rover.ebay.com/rover/0/0/0?m...2F360651431740

Clutch kit is able to bolt onto the flywheel, but flywheel and crank holes are slightly misaligned.
Read many threads about this problem, one of em said that he found his was a 5sfe stroker kit.
I am also not sure whether (if it’s possible) previous owner just kept his 3sge block and took the turbo + some parts from a 3sgte.

So current conclusion after some research is:
- gen2/3 3sge flywheel will fit on gen2/3 3sgte crank.
- since i bought a gen 2 3sgte flywheel and it cant fit, i assume my crank is not from gen2/3 3sge or 3sgte.
- another mechanic who claims he worked on this car many years ago, said he only replaced the pistons and conrods to stronger ones. And he said that jdm and usdm gen2 are totally different.
- i have researched on wiki and it states gen 2 3sgte is on 91-95 mr2 and 90-92 mr2 for japan. So if the car i’m working on has a 3sgte, it is the still under gen 2.

What am i missing out? Should i just try to get a 5sfe flywheel to see if maybe previous owner installed a 5sfe stroker kit?

Thanks in advanced for any replies
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post #2 of 9 (permalink) Old April 1st, 2019, 20:32
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Quote:
Originally Posted by Nigel Tay View Post
Hi from singapore, first post here after doing much research from many different sources..

So hereís my problem..
I am working on a sw20 mr2. Manufactured in 1990 resgistered in 1991. Chassis number states that itís a NA, but turbo engine is in the car. Iím not confident that previous owner swapped the entire engine to a 3sgte, but more about that later.

It came with a stage 4 clutch, really tough to drive. Owner wants to replace it with a softer one. So i ordered a exedy clutch kit and a lightened flywheel.

Flywheel link:
https://rover.ebay.com/rover/0/0/0?m...2F360651431740

Clutch kit is able to bolt onto the flywheel, but flywheel and crank holes are slightly misaligned.
Read many threads about this problem, one of em said that he found his was a 5sfe stroker kit.
I am also not sure whether (if itís possible) previous owner just kept his 3sge block and took the turbo + some parts from a 3sgte.

So current conclusion after some research is:
- gen2/3 3sge flywheel will fit on gen2/3 3sgte crank.
- since i bought a gen 2 3sgte flywheel and it cant fit, i assume my crank is not from gen2/3 3sge or 3sgte.
- another mechanic who claims he worked on this car many years ago, said he only replaced the pistons and conrods to stronger ones. And he said that jdm and usdm gen2 are totally different.
- i have researched on wiki and it states gen 2 3sgte is on 91-95 mr2 and 90-92 mr2 for japan. So if the car iím working on has a 3sgte, it is the still under gen 2.

What am i missing out? Should i just try to get a 5sfe flywheel to see if maybe previous owner installed a 5sfe stroker kit?

Thanks in advanced for any replies
GEN2/3 3SGE flywheels should fit onto a GEN2/3/4/5 3SGTE crank. This is ignoring the clutch itself, I won't go into that yet.

In Japan they had 2 versions of the GEN2 3SGTE for the SW20. No major changes though. From 89-91 was one version then from 92-93 was another but these do not have changes to the flywheel or crankshaft. The same part was used from 89-99 for the flywheel and the crank was the same for all GEN2 3SGTE then the part number changed for the GEN3 but nothing major there.

The USDM had 2 versions of the GEN2 3SGTE too from 91-92 and 93-95. These again didn't have changes to the flywheel or crank. There are changes but not huge changes. Yes the JDM and USDM GEN2 3SGTEs are different but not massively to say they are completely different engines.

The 5S does have a different crank shaft bolt pattern. Are you able to measure the flywheel and crank to provide us with the bolt spacing so we can confirm either way.
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post #3 of 9 (permalink) Old April 7th, 2019, 05:12 Thread Starter
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I just measured the pcd of the current flywheel with vernier calipers in mm and inches.
Workshop told me that the new flywheel we bought, pcd was a little spaced out then the crank’s bolt holes.
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post #4 of 9 (permalink) Old April 8th, 2019, 11:10 Thread Starter
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Can anyone save me? Haha
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post #5 of 9 (permalink) Old April 8th, 2019, 18:06
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I have asked a friend who has a flywheel with both 3S and MZ/VZ crank bolt patterns to see what you have. The MZ/VZ I think is the same as the 5S.
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post #6 of 9 (permalink) Old April 9th, 2019, 03:22 Thread Starter
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Thank alot! Hope i can confirm which flywheel it is..
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post #7 of 9 (permalink) Old April 11th, 2019, 20:20
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I have been given a dimension of 66.7mm but I need to confirm which bolt pattern was measured as the flywheel has 3S and MZ/VZ bolt patterns slotted.
This is close to your 68.52mm.
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post #8 of 9 (permalink) Old April 18th, 2019, 07:55 Thread Starter
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May i know what is the other pcd size? Cause if one is correct, i will just get a flywheel with mz/vz and 3sgte holes haha
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post #9 of 9 (permalink) Old April 19th, 2019, 08:09
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If it helps, i have my old drawing of 5s-gte flywheel (elongated holes for modyfying 3s gen3 flywheel to fit 5s crank). So bigger size is for 3s gen3, smaller for 5s. Not sure it is 100% precise as it has no decimal numbers, but it must be very close.
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