Official S65 Rod Bearing Condition Example Thread

[m3boost]

65k 2012 supercharged

[houston]

Thanks for the video. LCI bearings are a curse

[GORDON.M3]

Just had mine done. 36,000 miles.
Anyone still doubting or thinking about doing them...
I'd advise you to do them now, while your block and crank is still good!

[tdott]

Pretty bad bearings from an 09 120k, cyl8 looked pretty bad.

[doogee]

I guess I'll have to start a main bearing thread soon. Still hoping to change mine this fall.

They are just as much of a problem as the rod bearings from all examples I've seen.

[m3boost]

Did another video.

[bosse92m3]

Hey guys, would love some feedback on how this sounds.
The car is 2009 ,on a cold start and has 62,000miles on it.

[GORDON.M3]

Originally Posted by bosse92m3

Hey guys, would love some feedback on how this sounds.
The car is 2009 ,on a cold start and has 62,000miles on it.

Sounds normal. You can't "hear" rod bearings, once you can hear them the motor is practically done cause you'd be knocking even before you hit 2500rpm. The best way to know how your bearings are wearing is to do an oil analysis check and look for high lead or copper content.
That being said, just do the rod bearing change and stop worrying about it.

[GORDON.M3]

Originally Posted by doogee

I guess I'll have to start a main bearing thread soon. Still hoping to change mine this fall.

They are just as much of a problem as the rod bearings from all examples I've seen.

It's so cold already...
Did you figure-out which mains you are planning to go with?

[bosse92m3]

Originally Posted by gordon@

Sounds normal. You can't "hear" rod bearings, once you can hear them the motor is practically done cause you'd be knocking even before you hit 2500rpm. The best way to know how your bearings are wearing is to do an oil analysis check and look for high lead or copper content.
That being said, just do the rod bearing change and stop worrying about it.

Thanks Gordon, I'll just have to bite the bullet and get it done soon.
Cheers!!

[last1left]

Originally Posted by bosse92m3

Hey guys, would love some feedback on how this sounds.
The car is 2009 ,on a cold start and has 62,000miles on it.

It should sound smooth after the cold start up but yours seems to still sound rough spark plugs needed?

[doogee]

Originally Posted by gordon@

It's so cold already...
Did you figure-out which mains you are planning to go with?

Not sure yet. I have a friend going through some bearings from other engines/manufacturers to see if there is anything off the shelf that might work.

[doogee]

Originally Posted by m3boost

Did another video.

Far too much false information in this video. Please take it down, or just remove it from the thread.

We have enough internet mechanics around here to deal with.

[deansbimmer]

Originally Posted by doogee

Far too much false information in this video. Please take it down, or just remove it from the thread.

We have enough internet mechanics around here to deal with.

+1. Opinion shared in the video is only going to confuse those who need less confusion on the matter. You can't make informed assumptions about an issue if you don't even know the makeup of the bearing types you're looking at.

[bosse92m3]

Originally Posted by last1left

It should sound smooth after the cold start up but yours seems to still sound rough spark plugs needed?

Interesting, it does calm down more when it's warmed up. And I doubt it s spark plugs just got them done a month ago:

[Bartledoo]

Originally Posted by m3boost

Did another video.

[BaseM3]

Originally Posted by bosse92m3

Hey guys, would love some feedback on how this sounds.
The car is 2009 ,on a cold start and has 62,000miles on it.

so what's the problem?
Sounds heathy yo me....

[last1left]

Originally Posted by bosse92m3

Interesting, it does calm down more when it's warmed up. And I doubt it s spark plugs just got them done a month ago:

My car just sounds really smooth after warm up it might just be your video

[BaseM3]

Originally Posted by bosse92m3

Hey guys, would love some feedback on how this sounds.
The car is 2009 ,on a cold start and has 62,000miles on it.

so what's the problem?
Sounds heathy to me....

[Green-Eggs]

Originally Posted by m3boost

Did another video.

Hopefully you'll find this info a little helpful. The video compares 702/703 bearings (tin/aluminum) with 088/089 bearings (lead/copper) and essentially says: "mine don't look as bad as those, therefore mine and all others that look like mine are fine." Unfortunately, that's a very bad comparison because the two bearings are totally different from each other in how they look with excessive wear.

You have 702/703 bearings. As 702/703 bearings go, yours are some of the most heavily worn I've seen. In other words, they're in pretty bad shape.

The second thing wrong was mixing upper and lower shells and thinking they both wear the same. They don't. Uppers always wear much more than lowers. Often times the lowers show no wear at all. Your lowers show quite a bit of wear -- for lower shells. That's another reason I say for 702/703 bearings, yours were some of the most heavily worn I've seen.

[bosse92m3]

Originally Posted by BaseM3

so what's the problem?
Sounds heathy to me....

Nothing, just getting opinions on if anyone can hear anything wrong

[gorrerjm]

22K miles, with about 2k at the track....was going to run my oil analysis to start questioning the BE replacement. think it is time?

Ill post pictures of the bearings in a couple days.