Quote:
Originally Posted by Lester
There is a known issue with the N52 regarding the ticking noise. The way to fix it is to take it for a nice long drive on the freeway. There was a post on this last year, do a search on N52 engine ticking.
Its actually an air pocket in the lifters, its very common in the 1, and 3 series. Its mainly caused by low rpm driving( city). If you take it for a rip on the highway it should clear up...It will come back, but just go for another rip. Also your dealer will do a bleed on the system, but for many the noise comes back. Mine does this with frequency, and a decent run always fixes it...I took it to the dealer once and they bled the engine, and my SA told me that it was common, and not harmful at all.
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Ermm, according to the service bulletin in this post (
http://www.1addicts.com/forums/showthread.php?t=320299) the bleeding procedure isn't done anymore and they are actually replacing engine components?