Hello everyone, I got my block and crank back from the machine shop and everything went as planed but then I get a call from them asking about these oil galley plugs. It seems that someone brought in an L28 block and crank, after I had my work done, and had these plugs taken out for further cleaning. They found some hard ugly stuff in there. the other guy said that the motor had been sitting for a few years. My question is do I need to remove them, clean and tap for NPT plugs? The "How to