I got my valve cover off. That thing was seriously stuck on there and the VCG is very hard and brittle. In the process of getting the valve cover off, the brittle VCG snapped in some places. My question is...there are definitely pieces of rubber on the inner spark plug gasket area that chipped off and I think I have found most of them, but there might still be some lurking down somewhere. Just how bad is that? I'm worried they'll get churned up and slip down between a valve spring or worse.
Also, what do you guys do to clean the mating surface of the block? Brake cleaner?