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BMW M30 engine topic valve guides: theoretical installation and removal -Fits and oversize -Securing the valve guides with a round wire snap ring In the video I try to take you along a little while rebuilding my converted M30 engine. A valve guide had come loose on the engine and fallen down. I'm trying to give you my tips and tricks as a suggestion. I would be happy if you leave some feedback. #e30 #m30 #bmw #enginerebuild #engines