1988 flywheel in a 1987 (Page 1/2)
Gogoman OCT 07, 10:32 PM
My question is would a 1988 flywheel fit in a 1987 fiero gt V6 or not? And if it did fit how could this affect the engine??

Recently my 1987 Fiero Gt clutch when out and since I don’t have the tools to perform a clutch job I took it to a shop. I gave them all the necessary parts. Clutch, Pressure plate, pilot bearing, etc. I did not give them a new flywheel because I was told they would resurface my original. This didn’t come to past and a new flywheel was installed without my knowledge. Ones a was told the car was ready, I came to the shop and started is right up but I noticed that the car was shaking violently and I can hear a metal sound coming from the transmission. I’ve heard this sound before when the car would stall out on my.

I believe the shop may have put a flywheel from a 1988 instead of a 1987.
PS. The car was running smooth even when my clutch die.
Raydar OCT 07, 10:49 PM
Yeah... An 88 flywheel will likely kill your main bearings - sooner than later. It's waaaay out of balance.
Pre-88 flywheels are apparently no longer in production. Lots of parts stores claim that the 88 part works in the earlier engines - or at least they list the same part #. It doesn't work.
And if they ordered it from Rockauto, they likely got the wrong one, as well.

You can look at the back of the flywheel, if the lower dust shield is removed from the clutch housing (bell housing).
If it doesn't have a counterweight cast into the back, it's the wrong flywheel. Period.

[This message has been edited by Raydar (edited 10-07-2024).]

Gogoman OCT 07, 10:53 PM

quote
Originally posted by Raydar:

Yeah... An 88 flywheel will likely kill your main bearings - sooner than later. It's waaaay out of balance.
Pre-88 flywheels are apparently no longer in production. Lots of parts stores claim that the 88 part works in the earlier engines - or at least they list the same part #. It doesn't work.
And if they ordered it from Rockauto, they likely got the wrong one, as well.



Alright thanks a lot, tomorrow I’ll be asking for a recipe of the flywheel and see what flywheel the put in the fiero.
Yeah the engine is running super rough.
Dennis LaGrua OCT 07, 10:56 PM
The 85-87 2.8L engines were externally balanced. The 88 engines were internally balanced. Therefore an 88 flywheel on the earlier engines will not work as it should.

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Gogoman OCT 07, 11:19 PM

quote
Originally posted by Dennis LaGrua:

The 85-87 2.8L engines were externally balanced. The 88 engines were internally balanced. Therefore an 88 flywheel on the earlier engines will not work as it should.



Thanks Dennis. I’ll keep you guys updated and let’s hope everything turns out alright
cartercarbaficionado OCT 08, 03:53 AM

quote
Originally posted by Gogoman:

Thanks Dennis. I’ll keep you guys updated and let’s hope everything turns out alright


I got a good one if they threw away your old one. be thankful that the dukes and v6 flywheels are the same so I have a few
fierosound OCT 08, 11:20 AM

quote
Originally posted by cartercarbaficionado:

be thankful that the dukes and v6 flywheels are the same



That's not possible.


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cartercarbaficionado OCT 08, 11:22 AM

quote
Originally posted by cartercarbaficionado:

I got a good one if they threw away your old one. be thankful that the dukes and v6 flywheels are the same so I have a few


it literally is. bolt and clutch size are the exact same for the replacements you could buy 12 years ago.
funnily enough I took the one off the super duty clone engine and it's part number was a v6 part number and my 86 v6 parts engine has a autozone duke one.
they bolt up the exact same, fit exactly the same, the only actual difference is the pressure plate itself. not that it matters much when the aftermarket replacements are already much stiffer than stock

[This message has been edited by cartercarbaficionado (edited 10-08-2024).]

Additivewalnut OCT 08, 02:38 PM
huh. Today I learned there's a difference between 87 and 88 2.8s. Weird.
cartercarbaficionado OCT 08, 02:40 PM

quote
Originally posted by Additivewalnut:

huh. Today I learned there's a difference between 87 and 88 2.8s. Weird.


only difference is the rotating assembly (crank, harmonic, flywheel) there's honestly no reason to know or care unless you have one