[STR8-6IX]

Originally Posted by el_capitan

What oil are you running?

This noise seems to be very common amongst N55's, with many reports of people taking it in to the dealer and being noted as "normal.' There are other reports of people thinking it is vanos bolt issues, rod knock, lifters, etc.

However I can only find one documented case of an engine being replaced due to bad rod bearings. Does this mean that all of the people that have this noise are doomed?

http://www.e90post.com/forums/showth...=588939&page=2

http://www.bimmerforums.com/forum/sh...-inside-engine

http://www.e90post.com/forums/showthread.php?t=660859

your engine actually sounded quite healthy.. until you took off your oil filler cap lol! but with the oil cap on, all you hear is fuel injector tick. definitely sounds healthy more or less. although my engine is an N52, I will be posting a video of it idling and with the oil cap off tommorow to compare.