My mechanic just informed me about this hole in my upper timing cover on my 91 E30 318i M42 motor. In was in the shop to get an alternator replaced. I have no idea how it happened, I didn't hear any strange noises while driving it home from the shop. The area around the hole is bent outward. I just moved from sea level to 6200 feet (1900 meters) and to drive the M42 at altitude, you've got to drive it like you stole it to keep the revs up. The power at low RPMs at altitude is abysmal. Obviously the upper timing cover needs to be replaced and the oil pan needs to come off to see what parts are in the pan. What scares me is the internal damage that I can't see. I'm thinking the chain guide came loose and the chain hit the timing cover. I'll know for sure what happened when I get a look for a better inspection. Amazing this motor is still running. Thoughts from the group?
Topic: Hole in upper timing cover (Read 1881 times)