BMW M3 Forum (E90 E92) - View Single Post

Davisca455 · 02-15-2021, 08:03 PM

Quote:

Originally Posted by Assimilator1

Quote:

Originally Posted by Davisca455

Here's the two oil reports I had done prior to my rod bearing upgrade.
To me, they look pretty good for lead and copper.

Attachment 2525152
Attachment 2525151

And here's the pictures of my rod bearings.

Attachment 2525153
Attachment 2525154
Attachment 2525155
Attachment 2525156
Attachment 2525157
Attachment 2525158
Attachment 2525159
Attachment 2525160

Seems like the lead and copper levels should have been higher?
All I can guess is that the wear happened sometime prior to the two reports and then slowed.
Most people that have seen my bearings, are of the opinion that they were close to failing.
I think if I had chosen to put all my eggs in the oil report basket, I likely would have regretted that choice.

How many miles after the report did you have you bearings changed? And how many miles in total had your engine done then?
And yep, OA doesn't always flag bearing problems!

The last report was done at 63,943 miles.
I changed my bearings at 65,253.
So, I put 1310 miles on the car, between the last oil change/report, and the bearing upgrade.

The car now has 65,463 total miles.
So, 210 miles on the new bearings.