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

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

What was the brand of stop leak?

Quote:

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Originally Posted by p38arover

What was the brand of stop leak?

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No idea, was done by the previous owner before they had the head replaced

Only hope of head gasket repair via stopleak is to remove pressure at that cylinder eg: remooving apark plug/injector

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.

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).
Attachment 136892
I tend to believe that no “stop leak” should be used. Just fix the problem that is causing the leak.

regards,
Albert,
Haarlem Netherland