LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Resurface flywheel more than once?

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Old 09-01-2010, 02:37 PM
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Resurface flywheel more than once?

Can you do it on a stock LT1 flywheel? Im replacing the clutch and I dont know if it has been resurfaced before. The surface feels smooth as a baby butt, no grooves or anything. I searched and read that someone said you can take as much as 0.050 of these flywheels wit no problem.

Thoughts?
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Old 09-01-2010, 02:40 PM
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Why do you need to if its not damaged?
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Old 09-01-2010, 02:54 PM
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Im just looking for opinions and SPEC said to get a new flywheel or resurface the old one. IMO I dont think its neccesary cause like I said the surface is very smooth and nice. But this is the first time putting in a new clutch and dealing with a flywheel so I dont want to make a mistake. What else is there to check on a flywheel to decide wheter or not to resurface?
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Old 09-01-2010, 03:53 PM
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You could take the flywheel to a machine shop and ask if it needs to be resurfaced. Of course they might say yes even if it doesn't need it.
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Old 09-01-2010, 04:38 PM
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Originally Posted by krillformula
Can you do it on a stock LT1 flywheel? Im replacing the clutch and I dont know if it has been resurfaced before. The surface feels smooth as a baby butt, no grooves or anything. I searched and read that someone said you can take as much as 0.050 of these flywheels wit no problem.

Thoughts?
If it's smooth with no raised hot spots and heat cracks, I'm not sure I'd cut it, and if you're putting in one of those puck clutches they have, that will grind it up anyway.
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Old 09-02-2010, 12:42 AM
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I always surface flywheels for a new clutch, never considered trying to save the $40 to potentially have a problem later and have to start all over.
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Old 09-02-2010, 01:23 AM
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Originally Posted by MachinistOne
I always surface flywheels for a new clutch, never considered trying to save the $40 to potentially have a problem later and have to start all over.
Im not trying to save the money, Im just worried it'll be too much material removed since I dont know if it already has been resurfaced. If I knew I wont have any problem with it it would already be resurfaced..
So thats what Im thinking.

Thanks

Last edited by krillformula; 09-02-2010 at 07:34 AM.
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Old 09-05-2010, 07:21 PM
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The new clutch will NOT seat and slip if you dont resurface it.. Ask me how I know...LOL Then I just had to buy a new clutch remove the trans again and turn the fly wheel... NOT much fun.
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Old 09-05-2010, 08:07 PM
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Originally Posted by Kevin Blown 95 TA
If it's smooth with no raised hot spots and heat cracks, I'm not sure I'd cut it, and if you're putting in one of those puck clutches they have, that will grind it up anyway.
Its funny when I replaced my SPEC 3 for a SPEC 4 my clutch was still smooth as hell.
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Old 09-05-2010, 08:24 PM
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Originally Posted by hsyr
Its funny when I replaced my SPEC 3 for a SPEC 4 my clutch was still smooth as hell.
You're not doing enough nitrous launches
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Old 09-06-2010, 09:30 AM
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Originally Posted by Kevin Blown 95 TA
You're not doing enough nitrous launches
Touché.
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Old 09-06-2010, 10:34 AM
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Turns out the FW hasn't been cut before.
Taking it to a shop tomorrow to have it inspected for straightness etc. and I will probably have them take off 0.015" or so.
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Old 09-06-2010, 10:38 AM
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its just like a cylinder head, only so much can be takin off, put a straight edge across the surface, and take a feeler gauge to it, if it has too much runout on it have it resurfaced
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Old 09-06-2010, 09:55 PM
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If it hasn't been cut before just have them make a fresh cut. No need to go overboard with just a flywheel resurface.
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Old 09-07-2010, 05:08 AM
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As long as it meets minimum thickness after the cut you should be fine.
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