Fandt lige den Info som BenAnd havde i hovedet.
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Kan godt lide at de forslår at give den en over nakken på motorvejen. Jeg må vist en tur til Tyskland.
Solutions:
Very short term: take it for a hard drive on the highway, this will allow for the engine and oil to get at full operating temperature and will lubricate the lifters, thus making the sound go away, but this is only a temporary fix as the problem will reoccur after some time.
Short term: Bleeding the hydraulic system to get any air pockets out, usually this has the same effect as the previous but will last slightly longer, sometimes it wont work at all though. In my opinion its rather pointless to do this step ether do the earlier or latter. This is also usually the first step the dealer will take to try to mend the problem.
Medium term: Replace all 12 lifters with new lifters, the new lifters will be of a new design as the ones that came with the car when you bought it are now discontinued. This ussually mends the problem ether permanently or for an extended period of time, but has been known to not fix the problem for a lot of people. This is usually the second step taken by the dealer.
Long term/permanent term: The “right” and proper way to fix the problem is to replace the head with a newly designed head which has been redesigned to lubricate better. I have yet to hear of anyone where this didn’t solve their problem. Due to the expense of this process BMW will usually not approve this step util the previous have been done, but never the less will preform the work under warranty.
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