Quote:
Originally Posted by TooManyAxles
Thank you, this is good news on both fronts (RBs and TAs). I thought the consensus was 60k is the threshold when rod bearings should be done
|
At the moment there doesn't seem to be a pattern. There has been some with under 20,000 miles that blow and some with 200,000 + miles with the original bearings. BMW changed the bearing material in 2011to remove the lead. The newer style "looks" like it wears less, but it still wears about the same. Some 2008's are on original bearings, some have been changed. Some 2013's are on original and some have been changed.
It was common practice to use extra clearance bearings although alot of people stuck with OEM clearances. There is "possibly" new evidence that extra clearance bearing drops oil pressure enough to notice. But we will have to see how that plays out.
Yes these engines have rod and main bearing issues. Are they overblown or underestimated?
The best way to look at it at the moment is treat the rod bearings as a consumable. 60,000 to 100,000 miles seems to be the average to change them.
And yes look at the filter, that should tell you quite a bit. But only if its not new.
And lastly do a lot if research. Everyone has their own opinion on the matter. Do what makes you feel better, not what the internet tells you.