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Thread: anyone have experience with block sealants? ( head gasket leak )

  1. #1
    gewans is offline Cadillac Owners Member
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    anyone have experience with block sealants? ( head gasket leak )

    Thinking about using a head gasket sealant on my Northstar ( who would have guessed it would blow a gasket ) anyone have any experience with the brands out there.


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  3. #2
    Tony S45 is offline Cadillac Owners Member
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    Re: anyone have experience with block sealants? ( head gasket leak )

    gewans:

    I'm sorry to read about your problem. How many miles does your car have?

    I also have a Northstar (64k miles) and change the coolant every two/three years and hope the engine will last, but who knows...

    To your question, I have read about numerous snake-oil potions that claim that they will fix a head gasket problem but unfortunately for every success there must be scores of failures. If that were to happen to me I would get a quote from a reputable mechanic that has experience with Northstars for a correct fix including new head bolts. Next, I would attempt to calculate whether it's worth it to fix the car or attempt to sell it for parts. I know this is not what you want to hear but it's the reality of an expensive aluminum engine. However, before I'd sell it for parts I would certainly try a reputable firms head gasket sealant such as Lucas.

    Keep us posted as to your progress.

    Tony S45

  4. #3
    carnut is offline Cadillac Owners Master
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    Re: anyone have experience with block sealants? ( head gasket leak )

    The head gaskets fail because the head bolts loosen and the head raises. I doubt any snake oil could fix that.

  5. #4
    gewans is offline Cadillac Owners Member
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    Re: anyone have experience with block sealants? ( head gasket leak )

    Thanks for your reply. I have had many caddies with northstars and thought I would try sealant fix. A
    friend of mine with many years of experience fixing, fabricating, and racing tried sealant and it worked, for how long, who knows. I just wanted to give it a try. I can always pull the engine and replace the studs and do misc. maintenance. I live in Arizona and this is a bad time of year to rebuild motors. Thanks for your
    interest. I'll keep you informed.


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