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8/2/15 10:36am - Original Message: 'Best gaskets'
Redwoman Gold Member
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Bellingham, MA - USA

Vette(s):
1980 loaded red on red. 68,000 original miles. Second owner. Well documented with all original paperwork. NCRS Founders Award 9/27/14. NCRS Top Flight 10/12/14.

Joined: 6/23/2014
Posts: 171
What are the best gaskets to use on aluminum valve covers. I tried rubber and they just became brittle in less than six months. Also what is the best gasket for automatic tranny pan? I don't mind paying the price if they are worth the money.

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8/2/15 2:58pm - Reply: 'Re: Best gaskets'
Adams' Apple Lifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
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Cork...for both. Thumbs Up

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Joel Adams
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8/4/15 7:39am - Reply: 'Re: Best gaskets'
Redwoman Gold Member
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Bellingham, MA - USA

Vette(s):
1980 loaded red on red. 68,000 original miles. Second owner. Well documented with all original paperwork. NCRS Founders Award 9/27/14. NCRS Top Flight 10/12/14.

Joined: 6/23/2014
Posts: 171
Thanks Joel! Last year I had the tranny serviced and the kit came with a rubber gasket. The shop owner used a cork gasket instead of the rubber. He said the cork was better but it didn't take long for it to leak.

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8/4/15 8:51pm - Reply: 'Re: Best gaskets'
Adams' Apple Lifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 19457
Cork must be installed perfectly dry. The surfaces of both the pan, and mating surface has to be flat, clean & dry. Over tightening will cause the gasket to break.The quality of the gasket is important, too. There are some really THIN cork gaskets out there, for both valve covers and engine/trans pans.
First, be sure the gasket is actually leaking. Trans leaks can be hard to find the origins of, since the fluid will wick/seep everywhere.

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Joel Adams
C3VR Lifetime Member #56    
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(click for Texas-sized view!)
             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
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8/5/15 5:49am - Reply: 'Re: Best gaskets'
Redwoman Gold Member
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Bellingham, MA - USA

Vette(s):
1980 loaded red on red. 68,000 original miles. Second owner. Well documented with all original paperwork. NCRS Founders Award 9/27/14. NCRS Top Flight 10/12/14.

Joined: 6/23/2014
Posts: 171
On the valve covers I used fel-pro standard thickness and the thicker gaskets. The thicker gasket sealed better but a year later they started to leak to. Might be over tighten. The tranny pan gasket it definitely the cause of the leak. I think what happened was the cork gasket was old. My friend that has the tranny shop has retired five years ago. He rents out two bays and keeps one for himself to do small jobs. In the previous post I mentioned he used a cork gasket instread of the rubber one in the kit. I know he used a cork gasket on the shelf rather than a new one!

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