Rod Bearing Showcase Thread

[DropTopKingM3]

About to have mine done. VAC coated rod bearings with extra clearance and ARP bolts. I also got the oil pump upgrade kit.

Will post pics of the old bearings.

[hemi6]

198K, 2004, no copper showing but the "spring" was gone in several suggesting detonation pounded them at some point. Not bad at all and probably could have gone another 60k.

[cfdfireman1]

2006 M3 62K sure looks like it was time, no thanks to Blackstone it has been done.

blackstone62k.pdf

[Zekarus]

changed them in fabruary. 120k miles. oil analysis was good. so i won't do an oil analysis again. btw thats km on the analysis. just changing the oil a lot and will change them when I feel I need to.

[JamesSJ1]

2006, first time replacement at 91k miles. Blackstone was showing relatively high levels of copper all the time, but I didn't like the increase of all three lead, copper and iron in the last report. OCI ~7500 miles, didn't do Blackstone every time. Planned to do it around 100k miles, but used the downtime working from home and not needing to drive to get it done.

[M3mike]

I need to replace rod bearings..

[CrisSilberGrau]

Done at 121k miles, no record of them being done before.

Pics are in order from bank 1 to 6.

[mrgizmo04]

2006 - 115k mi

#2 was the worst. Not sure the blackstone matches the bearings?

Definitely glad I got this done and didn’t delay.

Those are surprisingly low numbers on the report for a 13k mile oil interval and the look of the shells...

Have you tried sending your pics of the shells back to Blackstone to get their take on "everything looks great".

Sent from my SM-G950U using Tapatalk

[8000RPM]

2006 - 115k mi

#2 was the worst. Not sure the blackstone matches the bearings?

Definitely glad I got this done and didn’t delay.

[ELEM3NT]

2005, 99k. Looks like they were getting pretty worn. Visible copper on several.

[Robert's_BMW]

2004 with 138800 miles on the clock, last 20,000 miles were AA supercharged. Just changed the headgasket a few weeks ago and figured I might as well do everything (also my last Blackstone was showing elevated Iron, Copper, Lead. Replaced with ACL Race bearings and OE Bolts. #2 Rod was definitely the worst showing copper, the rest were showing significant wear.

[bimmer]

March 2004 build. Original bearings AFAIK with 150,000 miles. Replaced with VAC bearings and ARP rod bolts. Was expecting much worse at 150K!

[///M3_MD]

Had these changed with 118k on the clock. Original recall done at 27k miles. They were probably ready to let loose. Put a new oil pump in at the time. Ended up having to rebuild the engine due to HG failure about 3k miles later (tune related).

[Arith2]

497 miles on these. They look pretty good.



These have 85,000 miles



71,000 miles out of my previous engine with a hole. Part of 6 is permanently attached to the crank.

[COVID-19]

Replaced them about 60k miles. 06 so it didn’t get them replaced under the service action