Official S65 Rod Bearing Condition Example Thread

[NeverL8]

/\ definitely can’t trust Blackstone reports

[MSY]

What do you guys think a bearing should look like on this motor? That picture is a perfectly fine wearing bearing set

[pbonsalb]

The resolution and light is not perfect when looking on my phone but the bearings seem to me to be worn though several layers, although I cannot see copper. My bearings had copper on the parting lines and down some sides at the same mileage but no copper in the center area.

[m235boy]

ya they aren't too bad, still had some life left in them. But definitely more wear than a typical engine at that mileage should be.

See this page on clevite website to compare bearing wear

https://www.mahle-aftermarket.com/me...s-brochure.pdf

[m235boy]

Originally Posted by TheRussski

/\ definitely can’t trust Blackstone reports

I guess if you do the blackstone analysis on a regular basis you'd be able to pick up the trends over time. In my case I just did one oil analysis, so perhaps all that wear was done much earlier in the engines life.

[deansbimmer]

Originally Posted by MSY

...That picture is a perfectly fine wearing bearing set

No, it's not...You've been staring at S65 bearings too long.

Normal bearing wear well into 100k+ miles should look like what Toolshed posted earlier- no wear past the first bearing layer.

Originally Posted by toolshed

[BigDenton]

Originally Posted by deansbimmer

No, it's not...You've been staring at S65 bearings too long.

Normal bearing wear well into 100k+ miles should look like what Toolshed posted earlier- no wear past the first bearing layer.

On page 4 though (https://www.mahle-aftermarket.com/me...s-brochure.pdf) it is stated that uniform wear (that we often see on '11-13 cars) is normal...

[strokemycocktus]

I think what we see in our rod bearings wear is oil starvation, according to this article.
I have noticed they say that lugging the engine may lead to oil starvation and to me it seems like a reasonoable cause. I can see all these people who complain about lack of low end torque in s65 flooring the car at 1,5k rpm in higher gears

[Ginlaan]

Have 133k on my e92. Doing my bearings as soon as shop has them. Guess there still on backorder. I will post some pics when I do it hopefully next couple weeks.

[Green-Eggs]

Originally Posted by strokemycocktus

I think what we see in our rod bearings wear is oil starvation, according to this article.
I have noticed they say that lugging the engine may lead to oil starvation and to me it seems like a reasonoable cause. I can see all these people who complain about lack of low end torque in s65 flooring the car at 1,5k rpm in higher gears

Here's all the oil flow vs oil pressure vs rpm data you'll ever need. Doesn't look like an issue to me
http://wiki.rcollins.org/core/index.php/Oil_Flow_-_S65_Oil_Flow_Analysis

[m235boy]

Originally Posted by strokemycocktus

I think what we see in our rod bearings wear is oil starvation, according to this article.
I have noticed they say that lugging the engine may lead to oil starvation and to me it seems like a reasonoable cause. I can see all these people who complain about lack of low end torque in s65 flooring the car at 1,5k rpm in higher gears

This is true... when other people want to drive my car they think they can just floor it at any low rpm (1500-2000 rpm) and because its a v8 they assume it should start pulling, lugging the engine. It's a heavy car and doesn't get moving until you start pushing it past 3,500 rpms

[deansbimmer]

Originally Posted by strokemycocktus

I think what we see in our rod bearings wear is oil starvation, according to this article.

..Think about the causes of oil starvation....Inadequate bearing clearances! Not just oil pressure etc.

[pbonsalb]

Originally Posted by m235boy

This is true... when other people want to drive my car they think they can just floor it at any low rpm (1500-2000 rpm) and because its a v8 they assume it should start pulling, lugging the engine. It's a heavy car and doesn't get moving until you start pushing it past 3,500 rpms

Actually the S65 has good torque from 2500 rpm. It could have made more peak power but BMW instead emphasized low rpm drive ability. One complaint about the V10 version of the motor was that the torque peak was at relatively high rpm, so BMW moved it down a bit in the S65.

And don’t forget the E90 was sold with 1.6 and 2.0L naturally aspirated four cylinder motors that made only about 150 lbs torque.

That said, I certainly don’t recommend lugging any engine and agree the S65 is a low torque high revving motor that does not have the off idle torque of the typical large displacement V8. The very high compression ratio for port injection pump gas makes detonation a greater risk and I am not 100% confident in the ionic knock sensors that BMW experimented with on this motor (and the S85) and no longer uses.

[admranger]

Originally Posted by m235boy

This is true... when other people want to drive my car they think they can just floor it at any low rpm (1500-2000 rpm) and because its a v8 they assume it should start pulling, lugging the engine. It's a heavy car and doesn't get moving until you start pushing it past 3,500 rpms

Yeah, you lost me at this 'when other people drive my car' bit. That's something that never occurred to me to try. Trying to figure out the upside unless it's Hamilton or Vettel asking. Hmmm...

[m235boy]

Originally Posted by admranger

Yeah, you lost me at this 'when other people drive my car' bit. That's something that never occurred to me to try. Trying to figure out the upside unless it's Hamilton or Vettel asking. Hmmm...

HAHAHA I know... I regretted it every, single, time.

[Taythefool]

Original Bering's at 77k

[jcolley]

Originally Posted by BigDenton

On page 4 though (https://www.mahle-aftermarket.com/me...s-brochure.pdf) it is stated that uniform wear (that we often see on '11-13 cars) is normal...

The key word you're missing in that statement is "axial". Not one single photo of any OEM S65 or S85 bearing has ever been photographed with uniform wear *axially* across the surface. It's the pronounced wear in both the axial and radial directions of the bearing surface that are indicative of oil starvation.

Uniform wear pattern over approximately 2/3 of the bearing’s surface. Wear
should diminish near the parting line ends of the bearing, and the wear pattern
should extend uniformly across the bearing in the axial direction

[jcolley]

Originally Posted by hpat

anybody have pics of BE bearings pulled after a few thousands of miles on 10w60?
it might not be a bad idea compiling a thread with examples of all pulled replaced bearings for sakes of comparison (WPC, BE, vac, etc.)

@Green-Eggs posted pictures of some I pulled at around 5k miles from an S85. There's a post here somewhere.

[Helmsman]

Originally Posted by jcolley

@Green-Eggs posted pictures of some I pulled at around 5k miles from an S85. There's a post here somewhere.

Missed that one and cant seem to find it. 5k isnt much but remember what they looked like cjolley?

[jcolley]

Originally Posted by Helmsman

Missed that one and cant seem to find it. 5k isnt much but remember what they looked like cjolley?

Found it:

https://www.m3post.com/forums/showthread.php?t=1407724

[Helmsman]

Originally Posted by jcolley

Found it:

https://www.m3post.com/forums/showthread.php?t=1407724

Ah, of course thats the one....thank you!

[Bomiz]

The main reason i'd want to do my bearings is just to see how bad they look haha