Quote:
Originally Posted by kiquos
Reviving the thread.
I bought an 2011 M3 with 80k miles and had the brgs replaced, it failed the next day at the track, hole on the side of the block.
New bearings ACL w/ 0.0025" clearance and Carrillo rod bolts.
waiting to take engine apart to see the issue? Parts or Labor.
I was told there is no break in period by the bearing manufacturer.
I've seen clearances from .001", 0.0025", and 0.050". What is supposed to be the correct clearance?
|
SO finally got around to pulling the engine out myself, did not trust the original shop that installed them. It looked like feta cheese inside.
I did get another long block w/ 44k miles and tried to order BE brgs but guess what back ordered till mid March. So I went with VAC. I will do the work myself, measure all bearings, and plastigage too to get a warm fussy!
Check it out here on Youtube link:
The top picture of OEM brgs when they came out at 80k miles.
lower picture is Aftermarket brgs at 1 day of use after rod failure.
My analysis: Under-torque of Rod bearings, letting loose, at least one cap, which destroyed the adjoining one. 2 con-rods went, 3 of bolts found cut and bent. 1 Rod bolt found practically intact, unbent, all thread clean of damage. minor bolt head damage. I suspect this is the bolt that backed out and drop to the bottom of the pan.
Failure happened 1 day after RB replacement, at the track, first session of the day. (Yes engine was nice and warm b4 hand, no there is no break-in period for these bearings) Oil: Amsoil signature 50 weight