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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.


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Old Sat, Nov-04-2017, 05:08:28 AM   #1
bigjae1976
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Default Rod bearing pics - 2004 M3 motor w/93k miles

Never mind the broken exhaust hub...the bearings look good...for an S54.




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Old Sat, Nov-04-2017, 05:11:59 AM   #2
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Default Re: Rod bearing pics - 2004 M3 motor w/93k miles

Look pretty good to me, about right.
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Old Sat, Nov-04-2017, 05:23:37 AM   #3
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Default Re: Rod bearing pics - 2004 M3 motor w/93k miles

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Old Sat, Nov-04-2017, 05:32:45 AM   #4
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Default Re: Rod bearing pics - 2004 M3 motor w/93k miles

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Look pretty good to me, about right.

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.


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Old Sat, Nov-04-2017, 05:35:07 AM   #5
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Default Re: Rod bearing pics - 2004 M3 motor w/93k miles

Yeah I was going to say, top row doesn't show any copper. Impressive.

I think most folks use blackstone analysis as a guide as to when to do it?
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Old Sat, Nov-04-2017, 05:41:28 AM   #6
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Default Re: Rod bearing pics - 2004 M3 motor w/93k miles

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Yeah I was going to say, top row doesn't show any copper. Impressive.



I think most folks use blackstone analysis as a guide as to when to do it?

Might not help if you buy the car used but oil sampling every couple of oil changes to establish a history is a good approach.

Iíve gotten out of the habit of using oil analysis with my E90 M3. My e46 is a track car so I can yank the motor in 2-3 hours. Not much of a hassle to do rod bearings whenever.


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Old Sat, Nov-04-2017, 05:43:50 AM   #7
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Default Re: Rod bearing pics - 2004 M3 motor w/93k miles

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Originally Posted by bigjae1976 View Post
Might not help if you buy the car used but oil sampling every couple of oil changes to establish a history is a good approach.

Iíve gotten out of the habit of using oil analysis with my E90 M3. My e46 is a track car so I can yank the motor in 2-3 hours. Not much of a hassle to do rod bearings whenever.


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2-3 hours... How many do you go through a year?
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Old Sat, Nov-04-2017, 05:48:04 AM   #8
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Default Re: Rod bearing pics - 2004 M3 motor w/93k miles

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2-3 hours... How many do you go through a year?

I donít have AC, heater core, emissions equipment and a bunch of other stuff. Makes it way easier!

Disconnect the driveshaft, drain the oil and coolant, pull off the front end, drop the front subframe, remove the intake manifold and it pretty much just comes out.


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Old Sat, Nov-04-2017, 03:34:06 PM   #9
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Default Re: Rod bearing pics - 2004 M3 motor w/93k miles

I just changed mine last week with 135k miles on them. I reckon they could have lasted at least another 10k miles.
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Old Mon, Nov-13-2017, 04:01:00 PM   #10
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Default Re: Rod bearing pics - 2004 M3 motor w/93k miles

replace with OEM, VAC? any other options?
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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)