Official S65 Rod Bearing Condition Example Thread

deansbimmer · 12-14-2022, 07:44 AM

Quote:

Originally Posted by bmwstephen

one thing I noticed in this thread is how are people's crankshafts and oil journals during the RB overhaul? Some bearing conditions in this thread suggests there was heavy contact to get it worn down that bad.

BMW hardens their crankshafts, so there is no wear to speak of during a preventative bearing service.

M2_MEDUSA · 12-17-2022, 11:23 AM

Quote:

Originally Posted by Green-Eggs

It's a spreadsheet posted by a rod bearing denier. He left the forum a long time ago after he had a rod bearing problem of his own. His engine didnt blow though. It's on this forum somewhere. Others have had an interest in updating it. I don't know if they did or not.

This is a beautiful end to the story.

rotomoto712 · 01-08-2023, 10:29 AM

I just changed out the bearings on my ~49K mile 2008. It looks like the uppers have taken a beating. Lot of copper showing on the outer edges as well.

Damage Inc · 01-08-2023, 03:26 PM

I have 52k miles on my 11 E90 ZCP. Debating if I should get mine done now, or wait another 10k or so.

DrFerry · 01-08-2023, 03:43 PM

Quote:

Originally Posted by rotomoto712

I just changed out the bearings on my ~49K mile 2008. It looks like the uppers have taken a beating. Lot of copper showing on the outer edges as well.

Definitely worth changing them, though they’re not too bad IMO. Good move to replace them. Well done. What type (brand) of rod bearings and rod bolts did you replace them with?

rotomoto712 · 01-08-2023, 05:51 PM

I went with BE Bearings with ARP Bolts. I am installing a Harrop kit so i wanted to be sure that the bearings were in top shape.

DrFerry · 01-08-2023, 06:09 PM

Quote:

Originally Posted by rotomoto712

I went with BE Bearings with ARP Bolts. I am installing a Harrop kit so i wanted to be sure that the bearings were in top shape.

Excellent. You went with the BE bearings and ARP bolts = the 'Gold Standard'. Congratulations on the Harrop SC. I just sold my Harrop blower after six years of ownership and 55K miles of use. I guarantee you'll love the Harrop. It makes the S65 think it's a V10..

Links to m3post Harrop threads:
Official Harrop thread:
https://www.m3post.com/forums/showthread.php?t=1070943
Harrop Owners Chime in (aka the unofficial thread):
https://www.m3post.com/forums/showthread.php?t=1802212

jvictormp · 01-08-2023, 09:15 PM

Quote:

Originally Posted by rotomoto712

I went with BE Bearings with ARP Bolts. I am installing a Harrop kit so i wanted to be sure that the bearings were in top shape.

Allow me to use your picture to ask something to whoever may know.

Are the upper ones supposed to be strictly used combined with the correspondently placed lower ones? Like I drawed the arrows in the picture? Or opposed?

Green-Eggs

rotomoto712 · 01-08-2023, 09:34 PM

Honestly, I'm not 100 percent sure, but i kept them together like that when i installed them.

dball4 · 01-09-2023, 01:04 PM

Mine at 99k miles. No record of prior replacement:

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Green-Eggs · 01-09-2023, 01:29 PM

Quote:

Originally Posted by jvictormp

Allow me to use your picture to ask something to whoever may know.

Are the upper ones supposed to be strictly used combined with the correspondently placed lower ones? Like I drawed the arrows in the picture? Or opposed?

Green-Eggs

All BE Bearings are measured, sorted, and binned before creating matched sets. That means all of the uppers are the same thickness as each other, and all of the lowers are the same thickness as each other. At that point, order within uppers/lowers doesn't matter.

DrFerry · 01-09-2023, 02:01 PM

Quote:

Originally Posted by dball4

Mine at 99k miles. No record of prior replacement:

Pretty decent IMO for that kind of mileage (99K). I've seen a lot worse at 2/3rds your stated mileage. Very good move to replace them finally.
Questions:
1) What year is your car?
2) What numbers are stamped on the backside of the shells you took out?
3) What type (brand) of replacement rod bearings and rod bolts did you go with?

dball4 · 01-09-2023, 04:30 PM

Quote:

Originally Posted by DrFerry

Pretty decent IMO for that kind of mileage (99K). I've seen a lot worse at 2/3rds your stated mileage. Very good move to replace them finally.
Questions:
1) What year is your car?
2) What numbers are stamped on the backside of the shells you took out?
3) What type (brand) of replacement rod bearings and rod bolts did you go with?

1. 2009 (10/2008 build) LCI e90 DCT
2. Didn’t catch them when I was at the shop
3. VAC bearings and ARP hardware

My tech noted that they could have been replaced early on, but again I have no record of them ever being done. They appeared to the the revised OEM ones

IamFODI · 01-09-2023, 04:56 PM

Quote:

Originally Posted by dball4

They appeared to the the revised OEM ones

They look like the original leaded bearings to me. Note the splotchy appearance of the top shells. The newer lead-free OE bearings get a yellow-ish discoloration (looks like wear down to the copper but isn't) but they don't usually get splotchy like that.

Green-Eggs · 01-10-2023, 10:42 AM

Quote:

Originally Posted by dball4

1. 2009 (10/2008 build) LCI e90 DCT
2. Didn’t catch them when I was at the shop
3. VAC bearings and ARP hardware

My tech noted that they could have been replaced early on, but again I have no record of them ever being done. They appeared to the the revised OEM ones

The numbers stamped on the backs of the bearing will tell you which ones you have. 088/089 are the original 2009 bearings. 702/703 are the updated bearings.

Assimilator1 · 01-10-2023, 02:39 PM

Quote:

Originally Posted by IamFODI

They look like the original leaded bearings to me. Note the splotchy appearance of the top shells. The newer lead-free OE bearings get a yellow-ish discoloration (looks like wear down to the copper but isn't) but they don't usually get splotchy like that.

Ditto

tom @ eas · 01-10-2023, 03:10 PM

Unfortunately, bad news for this S65. Spun bearing on #1.

2008 M3, 6MT @ 170,250mi

DrFerry · 01-10-2023, 04:13 PM

Quote:

Originally Posted by tom @ eas

Unfortunately, bad news for this S65. Spun bearing on #1.

2008 M3, 6MT @ 170,250mi

Looks like we have a new thread winner for the most delaminated rod bearing seen to date. 170K miles! Talk about living on borrowed S65 time. I'm surprised the block wasn't windowed. Or was it tom @ eas ?

tom @ eas · 01-10-2023, 05:20 PM

Quote:

Originally Posted by DrFerry

Looks like we have a new thread winner for the most delaminated rod bearing seen to date. 170K miles! Talk about living on borrowed S65 time. I'm surprised the block wasn't windowed. Or was it tom @ eas ?

Block is fine, car runs good, plenty of power. Wouldn't have even suspected a thing until the pan was pulled.

IamFODI · 01-11-2023, 04:53 AM

Quote:

Originally Posted by tom @ eas

Block is fine, car runs good, plenty of power. Wouldn't have even suspected a thing until the pan was pulled.

Not even rod knock??

Assimilator1 · 01-11-2023, 01:55 PM

Also interested to know, and how was the crank?
Is the big end cap scrap? Or can it be polished??

--Aramis-- · 01-12-2023, 03:38 AM

Quote:

Originally Posted by tom @ eas

Block is fine, car runs good, plenty of power. Wouldn't have even suspected a thing until the pan was pulled.

Block is alive?

owner must play to lottery

01-08-2023, 10:29 AM	#2709
rotomoto712 Private First Class 120 Rep 108 Posts Drives: 2008 BMW M3 Convertible Join Date: Aug 2016 Location: Deutschland iTrader: (0)	I just changed out the bearings on my ~49K mile 2008. It looks like the uppers have taken a beating. Lot of copper showing on the outer edges as well. Attached Images
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01-08-2023, 03:26 PM	#2710
Damage Inc Lieutenant Colonel 808 Rep 1,944 Posts Drives: 2017 M2 Join Date: Apr 2005 Location: Nashville iTrader: (1)	I have 52k miles on my 11 E90 ZCP. Debating if I should get mine done now, or wait another 10k or so. __________________ Current: 17 OG M2 / R8 Performance Past Performance Cars: 01 M3, 05 M3, 06 M5, 08 M6, 08 M3, 11 M3, 13 M3, 15 M3, 911 C4S, 911 GTS, 17 M2,R8 V8, R8 RWS
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01-08-2023, 05:51 PM	#2712
rotomoto712 Private First Class 120 Rep 108 Posts Drives: 2008 BMW M3 Convertible Join Date: Aug 2016 Location: Deutschland iTrader: (0)	I went with BE Bearings with ARP Bolts. I am installing a Harrop kit so i wanted to be sure that the bearings were in top shape. Attached Images
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01-08-2023, 09:34 PM	#2715
rotomoto712 Private First Class 120 Rep 108 Posts Drives: 2008 BMW M3 Convertible Join Date: Aug 2016 Location: Deutschland iTrader: (0)	Honestly, I'm not 100 percent sure, but i kept them together like that when i installed them.
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01-09-2023, 01:04 PM	#2716
dball4 Enlisted Member 17 Rep 36 Posts Drives: '09 M3 Join Date: Mar 2015 Location: Oregon iTrader: (0)	Mine at 99k miles. No record of prior replacement: __________________ '09 E90 M3, DCT Silverstone '71 GTV
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01-10-2023, 03:10 PM	#2723
tom @ eas BimmerPost Supporting Vendor 8274 Rep 18,859 Posts Drives: BMW Join Date: Nov 2005 Location: Anaheim, CA iTrader: (19) Garage List 2018 BMW i3s [5.00] 2010 BMW M3 [6.50] 2015 BMW M4 [6.20]	Unfortunately, bad news for this S65. Spun bearing on #1. 2008 M3, 6MT @ 170,250mi __________________ Tom G. \| european auto source (eas) email: tom@europeanautosource.com · web: https://europeanautosource.com· tel 866.669.0705 · ca: 714.369.8524 x22 GET DAILY UPDATES ON OUR BLOG · FACEBOOK · YOUTUBE · FLICKR · INSTAGRAM
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01-11-2023, 01:55 PM	#2727
Assimilator1 Major 596 Rep 1,042 Posts Drives: BMW M3 e92 08 & 330d e90 10 Join Date: Sep 2019 Location: UK, Surrey iTrader: (0) Garage List 2010 BMW 330d [8.00] 2008 BMW M3 [0.00]	Also interested to know, and how was the crank? Is the big end cap scrap? Or can it be polished?? __________________ . Oil analysis for finding wearing rod bearings?. Collation of oil analysis reports with some rod bearing photos for the M3's S65. My categorisation of pulled rod bearings in the rod bearing condition thread. My updated 'Blown engines' list.
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