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Old 05-19-2026, 09:24 AM   #13
katy
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Join Date: Jun 2015
Location: Red Deer, Alberta
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Default Re: Slight water leak at head gasket below water pump

Quote:
Originally Posted by BRENT in 10-uh-C View Post
When you get ready to add the sealer, I would take a small piece of fuel line that you can slip over the radiator overflow tube. Stick a bolt in the opposite end of the hose to basically plug air escaping out the tube. What this will do is add pressure to the system (2-3 lbs) which will help force the sealer into the seeping area. Once you have run the engine for awhile (we typically run them for about an hour on our run-in stand after retorquing the head gasket). At that point, drain the coolant with sealer and then thoroughly flush the Radiator separately to get any remaining sealer out of the tubes so it won't plug the tubes. Then let the block sealer dry overnight, and you will be good. I'm sure there are other ways too, but this has worked well for us.
I think that's a good idea, pushing the sealer into the minute cracks.
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