The engines crankshaft takes all of the explosive energy from the pistons and translates this to the drivetrain. When bearings spin due to improper maintenance or oil starvation, the shaft can become scored and is no longer serviceable. Turner carries Genuine BMW replacements that fit and perform exactly as intended
Working on your S50/S54 or B series timing system? Then you need this adapter that will allow you to turn the engine over at the crankshaft with a socket wrench. BMW tool number: 11 5 100