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Old 11-29-2020, 01:11 PM   #29
Scooby Newbie
Member#: 520587
Join Date: Nov 2020

I know this is ancient, but...

The first reply in this thread says:

3) You need to get the sealing surfaces for the head gaskets way cleaner than that. Those little dark areas are sites for potential future HG leaks. Subaru HGs are stupid fracking picky about how well you clean up. All around the sides of the shortblock, all under the heads, needs to be spotless.

I've been cleaning with a plastic razor, a rag and brake cleaner for 3 hours, and those little dark spots stubbornly persist!

Many seem to advocate using a razor blade, and others say never use anything sharp or abrasive. I can understand why, and it seems much safer not to, so I've erred on the side of caution. Is there any solvent that will help loosen them up?

Thanks for any advice!
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wrenchMonkey99 is offline   Reply With Quote