Hi, recently had clutch replaced on 2003 540i M62. Had rear main seal, rear main plate gasket, water plate gasket, front trans seal all done at same time. Worked great. approx 1 month later, starts losing ton of oil. Mechanic says rear main seal "sucked into engine
" causing the big leak. He says its probably the CCV (crankcase vent valve) causing too much crank case vacuum. I don't want to replace it for no reason, and it doesn't sound possible to me. Thinking more likely the spring popped off the seal. 85k miles total. Thoughts?
JA: Have you ever replaced the gaskets? Maybe the hoses?
Customer: What gaskets and hoses? Question is, can a bad CCV cause enough crankcase vacuum to suck a rear main seal or spring into the engine? Or more likely a failed replacement job or bad seal? I have no other symptoms.
JA: Are you fixing your 540i yourself? What have you tried so far?
Customer: This is the first job I haven't done on my car myslef since I have owned it, 11 yrs. Was winter in NE when clutch went and I didn't want to do it in the cold in my driveway...nothing tried in this instance. All that replaced at one time, leaked a month later, trans out at shop and he says seal sucked into engine. Replace seal will solve prob of leak, but if it was caused by crankcase vacuum too high, it could happen again if not solved. But I would think it impossible, and Id have other symptoms if CCV was bad.
JA: Anything else you want the mechanic to know before I connect you?
Customer: No, thanks.