Feb 21 • Diagnosis Board
BMW X3
Hey everyone, I need help. On my girlfriends 2014 X3 we had a wastegate actuator failure, which is covered by a TSB and her paid warranty. However, I pulled the oil filler cap and initially there is a slight vacuum but once the cap is fully off there is positive pressure, which I classify as significant. I removed the oil filler cap because we had misfire codes and dangerous exhaust codes. We took the vehicle to BMW for the warranty work on the wastegate actuator but they claim that the positive pressure from the valve cover is normal for all BMW engines. I'm worried its blowby. The service information I have access to, prodemand, mentions nothing of positive pressure in the pcv system as I am explaining it.
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BMW X3
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