I just purchased a new cam for my daily driver that I'm rebuilding. Had the machine shop throw in some new bearings but my cam is fitting way too tight, I cant even turn it by hand. I know its not suppose to be this tight, what would cause this? Can the shop plug in new bearings with the crank and pistons installed already? I would hate to tear it back down because of a burr on a bearing that can be replaced. Any suggestions is appreciated thanks