Who here runs an O-Ringed block? Leaking head gasket problem!

madscientist said

You can pull the o-rings out and use a two part filler in the grooves. Make sure the grooves are clean and dry. Fill them with the 2 part and let it dry. Run a long board over the decks to make sure all the filler is flush and run it. Done it many times. No need to deck it, if it's flat.

Never did understand why guys try to run o-rings without receiver grooves.

Never did understand why guys try to run anything but copper gaskets with o-rings. It's not new technology.


FWIW I have used JB weld to fill the grooves, as well as Moroso and some stuff I get from Brownells.

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Yeah I really don't know why people do it either after reading about it and it being very clear that practically everyone runs a copper gasket when doing this. This is one of the MANY problems I have encountered that the previous owner had done to the car and engine. My builder fixed a bunch of issues the engine had. The old head gaskets didn't seem to have any issues. He probably thought don't fix it if it ain't broken so, understandably, he put in a new set of the same part number gaskets on. But now I'm stuck with the problem. If I can verify that it's not leaking into the cylinders, I think I'm just going to run it until it gets bad enough that it needs attention. I just changed the oil and it was very clean. The valve covers don't have any milkyness under them at all. So that is promising.