C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Clutch Question- WHy would they do this?

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Old Jun 28, 2005 | 10:27 AM
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Default Clutch Question- WHy would they do this?

I purchased a 94 Coupe with ZF-6. Previous Owner dropped a new engine in it before I purchased it. He also put in a new clutch when he did the engine swap. Here is my question, the person who installed the engine and clutch for the previous owner actually used washers in between the engine and the bell housing. Yes, spacers between the engine and the bell housing. Why in the heck would he do that? Clutch is a Valeo (spelling?) This was OEM according to previous owner.

Clutch works fine, other than the a whirring sound that comes from the car when idling and what I believe to be typical ZF-6 noises (based upon forum input) it has given me no problems.

Local mechanic says if it works leave it alone. Those of you who have spent time with this clutch assembly, I need your thoughts and opinions on this.
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Old Jun 28, 2005 | 12:53 PM
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Default That Bad?

I guess this one scared everyone off?
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Old Jun 28, 2005 | 01:06 PM
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Sounds like they may have put the wrong clutch in and had to space the trans out to make room.
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Old Jun 28, 2005 | 01:13 PM
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Default That crossed my mind too...

Any other thoughts? Does anyone know a good vette mechanic in Georgia? I don't have the expertise to operate on a clutch yet...
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Old Jun 28, 2005 | 01:21 PM
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Maybe the guy used the "good ol boy" method of lining up the input shaft of the trans to the crank. Shimming the bellhousing to the exact center line of the crank prevents binding, wear and noise from the box.
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Old Jun 29, 2005 | 07:08 AM
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Maybe the crankshaft flange in the new engine is slightly longer than the original engine? There is suppose to be a stainless steel shim between the engine and clutch housing, but no washers.
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Old Jun 30, 2005 | 08:40 AM
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Default Shim?

How wide is the shim that goes in there? That may answer it...?
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Old Jun 30, 2005 | 05:37 PM
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Hmm weird? Meybe it used to be an auto and now has a C-beam that is too short? Although I don't exactly know what the difference is, but one was shorter IIRC..
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Old Jun 30, 2005 | 06:06 PM
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Originally Posted by ClarenceT
Hmm weird? Meybe it used to be an auto and now has a C-beam that is too short? Although I don't exactly know what the difference is, but one was shorter IIRC..
It that were true it would be an awful thick washer. Actually the different driveshaft and C-beam are due to the manual using a D44 and the auto a D36 so the auto driveshaft/cbeam is longer due to the smaller D36.

Mike

Last edited by aboatguy; Jun 30, 2005 at 06:08 PM.
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Old Jul 1, 2005 | 08:32 AM
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Originally Posted by jakers
How wide is the shim that goes in there? That may answer it...?
The shim is very thin, I'm guessing 0.040" or so. There is one between the engine and clutch housing and the transmission and clutch housing. I think it's there to stop the reaction between the steel block and magnesium housing.
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Old Jul 1, 2005 | 05:26 PM
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...

Last edited by Davemc1963-87conv; Jul 1, 2005 at 05:28 PM. Reason: misread post
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Old Jul 3, 2005 | 11:27 AM
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From: Midland Georgia
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Default RPO code on this car is MN-6

This car is a MN6 so originally a six speed.
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