'85 GT Flywheel (Page 1/1)
jaredaltizer MAY 23, 05:57 PM
Hello Everyone,

I am trying to figure out where to buy a flywheel for my '85 GT - 4 speed manual. The only things I can find when I search online for a flywheel are Flywheel Shims. What exactly are these used for?

I am in the process of replacing my 2.8 after it threw a rod last summer and just figured that I should get the clutch, flywheel, and throwout bearing replaced while Im at it. The car has 90k on the clock and Im pretty sure this will be the first clutch replacement, but Im not positive. So, where can I find a stock replacement for the clutch and flywheel?

Thanks

------------------
Manual '85 Fiero GT
Manual ‘86 4cyl (Parts Car)
Manual '95 Mitsubishi 3000GT VR4

88Fingers MAY 23, 06:24 PM
Hey Jared, I would try The Fiero Store. I believe they have these items.
jaredaltizer MAY 23, 06:27 PM

quote
Originally posted by 88Fingers:

Hey Jared, I would try The Fiero Store. I believe they have these items.



Thank you for the quick response. I found that the Fiero Store has stock replacement clutches, but the only flywheel I see on that website is an ‘88 Flywheel. Does this fit for an ‘85 GT V6 with a 4 speed manual?
pmbrunelle MAY 23, 06:53 PM

quote
Originally posted by jaredaltizer:


Thank you for the quick response. I found that the Fiero Store has stock replacement clutches, but the only flywheel I see on that website is an ‘88 Flywheel. Does this fit for an ‘85 GT V6 with a 4 speed manual?



Early Fiero 2.8s (such as yours) use a crankshaft which requires an external counterweight for balance. This external counterweight exists in the form of a lump on the backside of the flywheel.

88 2.8 crankshafts are internally balanced; no external counterweight is needed (or desired). Hence, the flywheel for this engine is neutrally balanced.

There are two ways out of this conundrum:
1. Get an 88 (internally balanced) crankshaft for your Fiero, and use the neutrally balanced flywheel.

2. Get your existing flywheel (has the lump) resurfaced.

If you get your flywheel resurfaced, then the friction surface moves away from the transmission, towards the engine. If the friction surface moves too much relative to its initial position, then the clutch won't disengage properly.

Flywheel shims are installed between the flywheel and the crankshaft nose. They are used to push the flywheel's friction surface back to its initial position after a resurfacing job thinned the flywheel too much.

[This message has been edited by pmbrunelle (edited 05-23-2019).]

88Fingers MAY 23, 07:28 PM
Jared, listen to PMBrunelle, very knowledgeable!!
fierofool MAY 23, 10:10 PM
The flywheel thickness should be .080 from the crankshaft contact surface to the clutch disk contact surface. If you have it resurfaced ask the machine shop how much they took off or have them mic the thickness. Add shims in the amount of what was removed.