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  1. #21
    PWCToday.com Is My Home Away From Home the WaTeRhAwK's Avatar
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    Re: To use head gasket sealant or not

    Quote Originally Posted by korbichoff
    I allways use a spray-on copper gasket sealant...makes a real good sticky seal and is high temp resistance. Never any leaks.

    the problem with using coppercoat on head gaskets is that it is supsceptible to fuel breaking it down. it is not fuel resistant, nor will it withstand any type of spirits, it will break down.


    the best sealer to use on copper gaskets is threebond 1211 silicone based sealer. it is high temperature and is fuel resistant.

    CCC


  2. #22
    PWCToday.com Is My Home Away From Home Chester's Avatar
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    Re: To use head gasket sealant or not

    Quote Originally Posted by MrSki
    Quote Originally Posted by chargerman
    I've been anealing copper gaskets my whole life "Mrski", and never ruined one, furthermore...people were anealing copper gaskets long before vaccum furnaces were used to do so. But then you do know it all correct?
    I know quenching has nothing to do with annealing...

    Regardless...I hope the poster got a little more from my post as to his practiacal application of the theory. I'm just trying to help.
    Chargerman is right. When annealing copper, it's better to quench it with water. You will get less oxidation this way. Unlike steel, the cooling rate of copper is irrelevant to the softness gained by annealing.

    Chester
    Last edited by Chester; 11-27-2008 at 04:06 AM.
    Speed is very expensive. How fast do you want to spend?

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  3. #23
    PWCToday.com Is My Home Away From Home the WaTeRhAwK's Avatar
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    Re: To use head gasket sealant or not

    chester, bob marley is annealing that blunt.

    CCC


  4. #24
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    Re: To use head gasket sealant or not

    Quote Originally Posted by the WaTeRhAwK
    chester, bob marley is annealing that blunt.
    ...and quenching his jones at the same time.

  5. #25
    PWCToday.com Is My Home Away From Home the WaTeRhAwK's Avatar
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    Re: To use head gasket sealant or not

    Quote Originally Posted by SflSwampRat
    Quote Originally Posted by the WaTeRhAwK
    chester, bob marley is annealing that blunt.
    ...and quenching his jones at the same time.

    less oxidization.

    CCC


  6. #26
    PWCToday.com Is My Home Away From Home the WaTeRhAwK's Avatar
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    Re: To use head gasket sealant or not

    Quote Originally Posted by Super Dee
    I have a few different opinions from different shop manuals. I will be using a fibre gasket and not a copper gasket. One manual says to use a high temperature silicone sealant and the other says to put it on dry. Is there any reason not to use a thin film of sealant on both sides of the gasket for added security?

    It's a js550 if that makes any difference with stock compression.

    if it's a stock stroke 550 you don't even need a gasket. just clean the mating surfaces good with laquer thinner and glue the thing down with some 1211 sealer. the piston crown edges never clear the deck, and it makes better compression.

    CCC


  7. #27
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    Re: To use head gasket sealant or not

    No gasket on a stock 550? Sounds to good to be true, any else refute this? I looked around a little and form what I've read elsewhere the clearance on a stock 550 is something like .05-.08, so without a gasket that would still be good.

  8. #28
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    Re: To use head gasket sealant or not

    As far as I know the copper sealant that Permatex makes is fuel resisitant, I could be wrong though. Any way after using that sealant on all my copper head gaskets I never had any probs even with high compresssion.

    I'll tell what though the biggest problem I did have with gaskets and sealants was the "HEAD PIPE to the Exhaust manifold" that was the one always blowing out. A lot of heat goes through there plus the force of the exhaust so that one is tough. Any one have the cure for that?

  9. #29
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    Re: To use head gasket sealant or not

    i just found a used copper in my "package deal,and smudged some copper gasket on,grin,carefully not to block the waterpipes. when i hit the water next season,i'll let you folks know.
    interesting talk bout the temp thing. why should i?
    wuld like to know more.
    thx

  10. #30
    PWCToday Guru Water rat's Avatar
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    Re: To use head gasket sealant or not

    I've blown 3 head gaskets on my '92550sx.So i scraped the black stuff off an old steel one and used threebond 1211 which sealed well.I'm told copper gaskets have to be retorqued regularly.My experience with a copper gasket with the copper spray is that it didn't seal.I machined the head to adjust height to suit a 40thou green fiber gasket and rubbed grease in it.No leaks and is reuseable.
    Old skool rocks!

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