Its a pain, Ive done two while the head was still in the engine. Getting to it is the easy part, its stopping the metal shavings from falling inside the engine that's hard. :grinpimp:
As mentioned before, this oil galley plug needed to be drilled out for an oil passage in the head. Mine didn't fail until after I rebuilt my engine and had the head and block dialed in at a machine shop. Im not sure which cleaning methods they used on my engine but many of them can cause the...