Quote:
Originally Posted by ArenGh
It's not the Valve Cover Gasket. I just replaced it and have done a thorough inspection around the motor with a mirror. It's all clean. I've also watched with a mirror with the motor running to make sure no oil is dripping onto the downpipe or o2 sensor.
Oil is bubbling at the o2 sensor. Any ideas what the problem could be?
The car is a stock X3 35ix with 72k miles.
Thanks!
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Did you ever figure this out? I have the same problem, and tried tightening the o2 sensor but it still happens and is getting worse. I would like to know what it was as it sounds like I will be having to do whatever you did to fix it. Please let me know