BMW M3 Forum
BMW M3 Forum BMW M3 Gallery BMW M3 Reviews BMW M3 Social Groups BMW M3 Chat M3Forum Sponsors >>
Loading


Mobile M3forum
Go Back   BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X) > BMW M3 Discussions > E46 M3 (2001-2006)
Tire Rack Buy Winter Tires Now!
Not a member? Register Now!
Register Gallery All Albums Garage Search Today's Posts Mark Forums Read Calendar FAQ

E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


Reply
 
Thread Tools Display Modes
Old Mon, Nov-13-2017, 04:09:50 PM   #11
CrookedCommie
Captain Slow
 
CrookedCommie's Avatar
 
Join Date: Aug 2014
Posts: 851
In the garage:
Reputation: 0 CrookedCommie is on a distinguished road
Location: Cincinnati

Bulgaria




Default Re: Rod bearing pics - 2004 M3 motor w/93k miles

Quote:
Originally Posted by bigjae1976 View Post
Not sure if you can tell but there is no copper showing. The journals looked good and all measured to .002 with plastigage. I think it supports my theory that doing the rod bearings between 80k-100k is about right.


Sent from my iPhone using Tapatalk
I'm guessing you mean street miles, what about HPDE championship winning engines? Brand new WPC treated bearings and every blackstone report shows lead
Jump to top CrookedCommie is offline   Reply With Quote
Sponsored Links
Register now and remove these ads
Old Mon, Nov-13-2017, 04:19:18 PM   #12
bigjae1976
Registered User
 
Join Date: Nov 2008
Posts: 4,988
In the garage:
Reputation: 0 bigjae1976 is on a distinguished road
Location: Wichita

United States




Default Re: Rod bearing pics - 2004 M3 motor w/93k miles

Quote:
Originally Posted by Dirty Elf View Post
replace with OEM, VAC? any other options?

I stuck with OEM WPC treated bearings and rod bolts.


Sent from my iPad using Tapatalk
__________________
2013 F30 328i - Melbourne Red
2011 E90 M3 - Monte Carlo Blue
2004 E46 M3 - Imola Red
Jump to top bigjae1976 is offline   Reply With Quote
Old Mon, Nov-13-2017, 04:22:29 PM   #13
maw1124
Registered User
 
Join Date: Mar 2013
Posts: 70
In the garage:
Reputation: 0 maw1124 is on a distinguished road

United States




Default Re: Rod bearing pics - 2004 M3 motor w/93k miles

Are rod bearings a real issue on these, or only when tracked, or what? I knew there were an issue on the E9X cars, but I wasn't familiar with that issue here.

maw
Jump to top maw1124 is offline   Reply With Quote
Old Mon, Nov-13-2017, 04:29:08 PM   #14
bigjae1976
Registered User
 
Join Date: Nov 2008
Posts: 4,988
In the garage:
Reputation: 0 bigjae1976 is on a distinguished road
Location: Wichita

United States




Default Re: Rod bearing pics - 2004 M3 motor w/93k miles

Quote:
Originally Posted by CrookedCommie View Post
I'm guessing you mean street miles, what about HPDE championship winning engines? Brand new WPC treated bearings and every blackstone report shows lead

Yeah, street miles.

Track miles have more variables. My theory based mostly on hope and guessing is that your rod bearing replacement intervals should be more frequent once you disturb a factory motor. Think what you want...BMW was likely more precise when they put the motor together.

I think that max RPM plays a huge role. If you’ve got a tune and spin it up to 8200+ RPM every shift, I’d guess you’re looking at a 20k to 30k track mile interval on the OE bearings. The more often you shift at 7500ish RPMs gets you closer to the 80k to 100k interval.

My HPDE championship winning strategy is to build a matching spare motor and swap motors every so often. Then check the bearings when the motor is out.


Sent from my iPad using Tapatalk
__________________
2013 F30 328i - Melbourne Red
2011 E90 M3 - Monte Carlo Blue
2004 E46 M3 - Imola Red
Jump to top bigjae1976 is offline   Reply With Quote
Old Mon, Nov-13-2017, 04:30:26 PM   #15
Adrian S
Registered User
 
Adrian S's Avatar
 
Join Date: Apr 2011
Posts: 17
In the garage:
Reputation: 0 Adrian S is on a distinguished road
Location: Cape Town

South Africa




Default Re: Rod bearing pics - 2004 M3 motor w/93k miles

Quote:
Originally Posted by maw1124 View Post
Are rod bearings a real issue on these, or only when tracked, or what? I knew there were an issue on the E9X cars, but I wasn't familiar with that issue here.

maw
The short answer is yes. All the high-revving M engines have this issue sooner or later.

Although it is a matter of debate as to when they should be done, as rod bearing wear can vary quite a lot from individual engine to engine. Some engines go well over 120 000miles on original bearings. It all depends on how the engine has been treated throughout it's life.

What is almost certain, however, is the fact that when a rod bearing lets go it usually does a lot of damage - necessitating a replacement engine or at least a new crankshaft/bottom end rebuild.

Given this potential for collateral damage, it really makes sense to consider them a wear item and replace them before this happens. I agree with the suggested 80-100k mile range.
__________________
2003.5 BMW M3 Coupe 6MT
2004 BMW 330i M-sport 6MT
Jump to top Adrian S is offline   Reply With Quote
Old Mon, Nov-13-2017, 04:31:18 PM   #16
bigjae1976
Registered User
 
Join Date: Nov 2008
Posts: 4,988
In the garage:
Reputation: 0 bigjae1976 is on a distinguished road
Location: Wichita

United States




Default Re: Rod bearing pics - 2004 M3 motor w/93k miles

Quote:
Originally Posted by maw1124 View Post
Are rod bearings a real issue on these, or only when tracked, or what? I knew there were an issue on the E9X cars, but I wasn't familiar with that issue here.

maw

I think the E9X M3 had a worse issue with rod and main bearings (supercharged only for the mains) but the E46 S54B32 requires a change interval on the bearings above the normal M5X engine family.


Sent from my iPad using Tapatalk
__________________
2013 F30 328i - Melbourne Red
2011 E90 M3 - Monte Carlo Blue
2004 E46 M3 - Imola Red
Jump to top bigjae1976 is offline   Reply With Quote
Old Mon, Nov-13-2017, 07:41:35 PM   #17
Dirty Elf
BSME
 
Dirty Elf's Avatar
 
Join Date: Jun 2011
Posts: 4,387
In the garage:
Reputation: 0 Dirty Elf is on a distinguished road
Location: Orlando

United States




Default Re: Rod bearing pics - 2004 M3 motor w/93k miles

Quote:
Originally Posted by bigjae1976 View Post
I stuck with OEM WPC treated bearings and rod bolts.


Sent from my iPad using Tapatalk
any reason to not go with the VAC coated bearings vs the WPC OEM ones?

https://www.ecstuning.com/b-ecs-part...47835439wpckt/

vs

https://store.vacmotorsports.com/vac...s54-p1336.aspx
__________________
First Road Trip

2004 Silver-Grey ///M3 Coupe
Jump to top Dirty Elf is offline   Reply With Quote
Old Mon, Nov-13-2017, 07:46:09 PM   #18
T3AMFiSh
Registered User
 
T3AMFiSh's Avatar
 
Join Date: May 2008
Posts: 278
Reputation: 0 T3AMFiSh is on a distinguished road

United States




Default Re: Rod bearing pics - 2004 M3 motor w/93k miles

i really want to see a 30k-50k mile rod bearings that were WPC to see if there is actual wear on them
Jump to top T3AMFiSh is offline   Reply With Quote
Old Mon, Nov-13-2017, 07:47:18 PM   #19
T3AMFiSh
Registered User
 
T3AMFiSh's Avatar
 
Join Date: May 2008
Posts: 278
Reputation: 0 T3AMFiSh is on a distinguished road

United States




Default Re: Rod bearing pics - 2004 M3 motor w/93k miles

Quote:
Originally Posted by Dirty Elf View Post
any reason to not go with the VAC coated bearings vs the WPC OEM ones?

https://www.ecstuning.com/b-ecs-part...47835439wpckt/

vs

https://store.vacmotorsports.com/vac...s54-p1336.aspx
one is coated, one is micro pitted.. the WPC is technically micro pitted to let oil stay in the bearing
Jump to top T3AMFiSh is offline   Reply With Quote
Old Mon, Nov-13-2017, 08:27:40 PM   #20
Obioban
Moderator
 
Obioban's Avatar
 
Join Date: Jul 2003
Posts: 34,041
In the garage:
Reputation: 54 Obioban has a spectacular aura about
Location: SE PA

United States




Default Re: Rod bearing pics - 2004 M3 motor w/93k miles

Quote:
Originally Posted by maw1124 View Post
Are rod bearings a real issue on these, or only when tracked, or what? I knew there were an issue on the E9X cars, but I wasn't familiar with that issue here.

maw
The s65/e9X has rod bearing lottery failure (any mileage with any driving style), main bearing lottery failure (any mileage with any driving style) and rod bearing wear (more wear with more RPM usage, necessitating replacement as they wear out).

The S54 just has rod bearing wear (more wear with more RPM usage, necessitating replacement as they wear out)-- none of the lottery failures. Far less of an issue here, really just high revving engine maintenance.
__________________

Current Cars: 2005 IR/IR M3, 2001 LMB/blk M5, Wife's 6mt NA RWD e91, 04 M3 wagon
Past cars: 04 M3, 96 M3, S50B32 e36 M3 CM race car
Jump to top Obioban is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



All times are GMT. The time now is 09:47:37 AM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
M3Forum.com and M3forum.net is in no way sponsored, endorsed or affiliated by or with BMW NA / BMW AG or any of it's subsidiaries or vendors.
BMW and M3 (E90 M3 | E92 M3 | E93 M3 | E46 M3 | E36 M3 | E30 M3) are registered trademarks of BMW AG.
M3Forum Terms of Service
Copyright ©1999-2017 M3Forum.com
Discussing Rod bearing pics - 2004 M3 motor w/93k miles in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)