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Old 12-31-2004, 09:04 AM
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Valve Cover Gasket Leak

I have a leak in one of my valve cover gaskets..

The valve covers are bolted down with
4" T-nuts instead of the conventional
hex head bolts. I know the torque for
the bolts is about 4# each. Are you less likely to over torque with the T-nuts ?

Should I stay with the T-nuts or install regular hex head bolts.

Also is there a sequence in tightening down the bolts.

Thank's for your input.

I hope everybody has a safe and happy new year.
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Old 12-31-2004, 09:06 AM
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valve covers

use spreader bars. snug not tighten the t bars.
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Old 12-31-2004, 09:20 AM
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Stamped steel valve covers can be a pain to get to seal. They are so thin they just flex (and leak). As mentioned above you MUST use a load spreader of some sort or you will never get the to seal. I never use the tin valve covers any more aluminum ones are so much better.

If you still can't get them to seal you need to make sure the flange is still flat, I suspect if they have been used without a spreader or been tightend down too tight or a few too many times, the mating flange is ore than likely bent out of shape. You can massage it back into shape using a hammer and a block of wood (or some other flat object). If all else fails then use some sealer.

Royce
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Old 12-31-2004, 10:02 AM
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Quote:
Originally posted by camaroman7d
Stamped steel valve covers can be a pain to get to seal. They are so thin they just flex (and leak). As mentioned above you MUST use a load spreader of some sort or you will never get the to seal. I never use the tin valve covers any more aluminum ones are so much better.

If you still can't get them to seal you need to make sure the flange is still flat, I suspect if they have been used without a spreader or been tightend down too tight or a few too many times, the mating flange is ore than likely bent out of shape. You can massage it back into shape using a hammer and a block of wood (or some other flat object). If all else fails then use some sealer.

Royce

No stamped steel covers here. I have Trick Flow G2 aluminum heads and Trick Flow aluminum valve covers. They are straight with no distortion around the bolt holes.

I was more curious to know if there is any tightening sequence
using the T-nuts vs. the conventional hex bolts.
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Old 12-31-2004, 03:24 PM
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I'm not aware of any sequence.

If I have a leak, I usually just snug the bolts another 1/8-1/4 turn.
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Old 01-01-2005, 03:16 AM
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Thank's for all the sugestions!! I am going to go
after it and get the leak fixed today.

Hope everybody had a safe New Year's eve.

18-FEVR
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Old 01-01-2005, 07:29 AM
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I don't think you mentioned what type of gasket you are using, I have had great luck with one that Moroso makes. It is rubber mated to a steel shim core, there are other manufactures of similar gaskets.
I have never seen any tightening sequence for the covers, don't tighten one then move to the others, tighten in progression.
Those leaks can be a pain in the _ss.

I have used T bolts, hex bolts and studs you can get leaks with all.
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Old 01-01-2005, 08:53 AM
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hey i am a chick and i havent really worked with many head leaks but the ones i have worked with were a pain in the a** but i think you should change the bolts to the regular hex. later happy new year
-Brie
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Old 01-01-2005, 10:50 AM
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The Gaskets with the sleeves are also reuseable.Sure beats the hell out of the cork gaskets.Cork is good for plugging wine bottles and that is about it.
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Old 01-01-2005, 12:44 PM
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Couple tricks I learned from Bruce McCorkle (Engine Builder)

Does not matter what gasket material you use or what kind of covers (Stamped steel or aluminum) You can bend them all just as easily by tightening the bolts to try to get rid of a leak.

This is his method. Step 1. Clean Rocker covers completely and straighten out the flage using a small hamer on a flat anvil. (Dont flaten out the little ridge that holds the gasket in place.

Step 2. using contact cement glue the gasket two the rocker cover and let it set up before installing.

Step 3. put a little engine oil or grease on the surface of the gasket that will contact the head. (This will let you remove the rocker covers later without requiring a new set of gaskets. They come off the head easily and they are still stuck to the valve cover.)

Step 4 bolt on to engine using no more torque than the manufacturers spec.

Works Great I have used this method on my stock car ( Soldi lifter cam adjusted lash about 6 times during the season and used the same set of gaskets the whole season.)

Ric
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