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View Poll Results: Have you replaced your stock bearings?
Yes, replaced them with extra clearance bearings 136 47.39%
No, have not replaced them yet/not planning on replacing them 151 52.61%
Voters: 287. You may not vote on this poll

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      08-15-2018, 03:22 PM   #23
Mvy
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I did mine 4 years ago and have 20k miles on the original no extra clearance vac rod bearings and arp bolts. I've done oci every oc since as well as checking the oil filter for flakes. No issues to date.
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      08-23-2018, 01:09 AM   #24
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Quote:
Originally Posted by jeff@autocouture View Post
replaced mine at 101k, NOT with extra clearance bearings.... with WPC treated OEM
Why not extra clearance bearings? I’m sure you see the wear your shop performed of RB service
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      08-23-2018, 07:25 AM   #25
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Quote:
Originally Posted by TheRussski View Post
Why not extra clearance bearings? I’m sure you see the wear your shop performed of RB service
I see it (myself) as not a clearance issue but an issue with improper warm ups as well as reducing friction on the bearing for oil to move past. I also use Redline 5w50 oil. That's my personal input on it. My shop has been using WPC treated OEM bearings + ARP bolts for quite some time now, with not a single car back with bearing issues. This gave me the piece of mind to go with something tried and true.
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      08-23-2018, 07:34 AM   #26
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Quote:
Originally Posted by jeff@autocouture View Post
I see it (myself) as not a clearance issue but an issue with improper warm ups as well as reducing friction on the bearing for oil to move past. I also use Redline 5w50 oil. That's my personal input on it. My shop has been using WPC treated OEM bearings + ARP bolts for quite some time now, with not a single car back with bearing issues. This gave me the piece of mind to go with something tried and true.
I see it from your perspective. Have you guys pulled any WPC bearings after some mileage?
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      08-23-2018, 08:04 AM   #27
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Quote:
Originally Posted by TheRussski View Post
I see it from your perspective. Have you guys pulled any WPC bearings after some mileage?
not recently, years ago the shop did and showed no wear
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      08-23-2018, 01:34 PM   #28
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Going to do mine next spring summer. I have cpo warranty until Aug 2019 which helps me sleep at night.
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      08-29-2018, 04:41 PM   #29
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Will be in mid October with be bearings fitted by a reeve performance in kings Lynn, uk.

Planned to power run at same time to get a comparison on numbers from last time, running harrop charger!
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      08-29-2018, 05:33 PM   #30
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Doing mine in 2 weeks at 49k. Curious to see how they look, and looking forward to only worrying about the TAs.
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      01-02-2019, 10:26 AM   #31
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Previously done? How would you know?

If you're the 2nd or 3rd owner, and bought from a dealership (BMW or otherwise), how would you know if they were done if you can't track down the previous owner(s)? oil analysis looks ok so far, so... spend $2400 or not?
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      01-02-2019, 10:32 AM   #32
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If it’s not in the dealers records and you see no signs underneath that things were disassembled, highly unlikely they were replaced.
Oil analysis is not indicative or helpful on later model years.
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      01-02-2019, 10:38 AM   #33
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Quote:
Originally Posted by PilotAce View Post
If you're the 2nd or 3rd owner, and bought from a dealership (BMW or otherwise), how would you know if they were done if you can't track down the previous owner(s)? oil analysis looks ok so far, so... spend $2400 or not?
First figure out your build year. This will correlate to what bearings were used in your engine. You're on the cusp of when they changed bearing materials. The older models had bearings that contained copper in them. So if your oil analysis contained relative amounts of copper you could assume that they are of the older composition, thus not replaced.
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      01-02-2019, 12:33 PM   #34
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Quote:
Originally Posted by PilotAce View Post
If you're the 2nd or 3rd owner, and bought from a dealership (BMW or otherwise), how would you know if they were done if you can't track down the previous owner(s)? oil analysis looks ok so far, so... spend $2400 or not?
There’s no way to tell unless you open it up. You can’t trust oil analysis, few members on here had good report and their engine failed weeks after. Just get them changed.
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      01-04-2019, 10:49 AM   #35
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Quote:
Originally Posted by JP10 View Post
First figure out your build year. This will correlate to what bearings were used in your engine. You're on the cusp of when they changed bearing materials. The older models had bearings that contained copper in them. So if your oil analysis contained relative amounts of copper you could assume that they are of the older composition, thus not replaced.
My 2011 was produced in 04/10 and came with lead/copper bearings. I am not sure when the tin/aluminum bearings started being used in the manufacturing cycle. Does anyone have this information?
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      01-11-2019, 07:54 AM   #36
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Quote:
Originally Posted by Scharbag View Post
My 2011 was produced in 04/10 and came with lead/copper bearings. I am not sure when the tin/aluminum bearings started being used in the manufacturing cycle. Does anyone have this information?
I've been looking for one myself and this would be good information to know. Anyone?
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      01-11-2019, 08:07 AM   #37
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Should be an option for OEM, and OEM treated bearings.
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      01-11-2019, 09:38 AM   #38
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Quote:
Originally Posted by Scharbag View Post
My 2011 was produced in 04/10 and came with lead/copper bearings. I am not sure when the tin/aluminum bearings started being used in the manufacturing cycle. Does anyone have this information?
Quote:
Originally Posted by 0605260 View Post
I've been looking for one myself and this would be good information to know. Anyone?
I know this isn't too helpful without an exact date, but everything I read was mid to late 2010 production date is when the change was implemented.
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      01-14-2019, 08:18 PM   #39
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      01-15-2019, 09:34 AM   #40
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Quote:
Originally Posted by tdott View Post
Should be an option for OEM, and OEM treated bearings.
^ This.

Just had mine replaced at ~82k miles with BMW OE everything.
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      01-15-2019, 01:32 PM   #41
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Originally Posted by IamFODI View Post
Just had mine replaced at ~82k miles with BMW OE everything.
Sorry to hear that.
OE everything is like the worse option available today.
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      01-15-2019, 01:56 PM   #42
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Quote:
Originally Posted by jeff@autocouture View Post
I see it (myself) as not a clearance issue but an issue with improper warm ups as well as reducing friction on the bearing for oil to move past. I also use Redline 5w50 oil. That's my personal input on it. My shop has been using WPC treated OEM bearings + ARP bolts for quite some time now, with not a single car back with bearing issues. This gave me the piece of mind to go with something tried and true.
so what is WPC coating on oem bearings? im thinking of going oem with ARP bolts
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      01-15-2019, 02:01 PM   #43
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Quote:
Originally Posted by KevM3UK View Post
so what is WPC coating on oem bearings? im thinking of going oem with ARP bolts
It's a micro shot peening process to increase strength and decrease friction on a surface.
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      01-15-2019, 02:54 PM   #44
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so is oem shells and arp bolts a good option, im so confused!
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