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Thread: Don't use stop leak to try and fix head gaskets

  1. 21st February 2018, 09:00 AM #11
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    rover-56
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    I don't think rad stop leak can work properly for a head gasket pressure leak anyway.
    The stuff relies on being forced into the leak and then solidifying.
    With a compression leak the flow is from the cylinder INTO the water jacket the stop leak can't get into the leak.
    I have used the stuff for leaks from the cooling system out to atmosphere - that works ok.

    Terry
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  2. 21st February 2018, 10:05 AM #12
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    p38arover
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    What was the brand of stop leak?
    Ron B.
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  3. 21st February 2018, 10:17 AM #13
    Mal
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    Quote Originally Posted by p38arover View Post
    What was the brand of stop leak?
    No idea, was done by the previous owner before they had the head replaced
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  4. 21st February 2018, 10:26 AM #14
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    theelms66
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    Only hope of head gasket repair via stopleak is to remove pressure at that cylinder eg: remooving apark plug/injector
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  5. 24th February 2018, 12:50 PM #15
    rusty05
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    I have had reasonable results from Repco stop leak which made a big diff in the v8 weaping around the usually places.
    Other brands not the same success.
    used it for 2 years before getting the heads done.
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  6. 1st March 2018, 08:11 AM #16
    Mybb Guest

    Stop leak..

    I almost choked, the black stuff reminded me of what I found. The former owner of my D2 was “stopping” oil leaks, fuel and air leaks with black (glue)sealant. Here is a example when I overhauled the fpr (and fuel lines high and low pressure).
    0DF5ECBF-1407-4281-BA76-7C0E16112CCE.jpg
    I tend to believe that no “stop leak” should be used. Just fix the problem that is causing the leak.

    regards,
    Albert,
    Haarlem Netherland
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