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View Full Version : Small Cracking Noise when engine is idle but AC shut off.



iujack
08-30-2015, 11:11 PM
Dear all,

I have a 2008 320i with low milage of 55,000 km. I am, experiencing a strange small cracking noise right after engine start (not only cold start) with fan on or off, but AC compressor off. The small cracking noise will disappear after I pressed ON the AC button. The strange thing is, the cracking noise WILL NOT come back if I turn off the AC a while later.

Would that be any relationship with the compressor clutch somehow touching each other during the engine start. And after I switch on, and off the AC, the clutch moves back to a total separation position so that it does not touch each other anymore?

Or, is there a problem other than what I am guessing?

Anyone has similar problem?

Thanks a lot!

Jack