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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 Wed, Aug-15-2018, 11:09:30 PM   #31
bigjae1976
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Default Re: I guess its my turn: crappy Blackstone

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Originally Posted by Texaz3 View Post
I think if the set of bearings lasted through 100-120K originally, and you replace it with something that would be fine for another 100-120K miles, at 200-240K miles on the engine, there will be other things that probably would warrant at least partial rebuild anyway.

IMO, if stock lasts 100k to 120k then an in car replacement will likely have a slightly shorter life span.

Fact, youíre not going to be as precise working underneath the car vs the factory.

Just a theory...


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Old Wed, Aug-15-2018, 11:12:27 PM   #32
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Default Re: I guess its my turn: crappy Blackstone

Sorry to hear OP. On a side note, are we gonna see a build thread for this E46 M3? The last thread for the E36 M3 awesome.
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Old Wed, Aug-15-2018, 11:30:07 PM   #33
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Default Re: I guess its my turn: crappy Blackstone

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IMO, if stock lasts 100k to 120k then an in car replacement will likely have a slightly shorter life span.

Fact, you’re not going to be as precise working underneath the car vs the factory.

Just a theory...


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Maybe, but that's just speculation at this point.

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Originally Posted by simon_c View Post
Sorry to hear OP. On a side note, are we gonna see a build thread for this E46 M3? The last thread for the E36 M3 awesome.

Yeah, I'm planning to do it at some point, just too many things happening right now with it. Mostly sorting it out mechanically, no time to make things pretty yet. Once I get enough things done - I'll post a build journal.
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Old Wed, Aug-15-2018, 11:34:40 PM   #34
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Default Re: I guess its my turn: crappy Blackstone

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Originally Posted by bigjae1976 View Post
IMO, if stock lasts 100k to 120k then an in car replacement will likely have a slightly shorter life span.

Fact, you’re not going to be as precise working underneath the car vs the factory.

Just a theory...


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Didn't BMW dealers do the recalls with the motor in the car

If the pump is in good condition and the old ones came out with typical wear at 100k+, then the next set should last until a rebuild. That is unless something else goes wrong with the top end like worn rockers, cams or broken head gasket. There is always something.
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Old Thu, Aug-16-2018, 01:04:14 AM   #35
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Default Re: I guess its my turn: crappy Blackstone

On the angle torque, you have to account for spring back. Iíd argue that thereís is a variance in torque on each torque sequence when working on your back. Will that make a huge difference? Not sure.

Factory has calibrated tools and sensors.

My guesstimate is 80k - 100k on the original bearings. Iím going with 60k to 70k on replacements. Figure a 2:1 count for track mileage.

Of course...all theories and good feelings.


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Old Thu, Aug-16-2018, 02:36:27 AM   #36
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Default Re: I guess its my turn: crappy Blackstone

I think its simple - changed the bearings? Do an oil sample if not every time, every other time. Start seeing lead/copper - change again.
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Old Thu, Aug-16-2018, 02:51:55 AM   #37
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Default Re: I guess its my turn: crappy Blackstone

Lifetime warranty on all my bearing components so I'll be doing them every 60k miles If I even drive it that much?
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Old Fri, Aug-17-2018, 06:24:13 PM   #38
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Default Re: I guess its my turn: crappy Blackstone

Ok, the bearings are done, huge thank you to Coulter at MPorium BMW for a tremendous job and quick turnaround. If anyone in DFW are is looking for a bearing job, these guys are the best.

Now to the bearings - they look quite worn, with top shells particularly rough looking with several showing quite a bit of copper as indicated by Blackstone. But overall, these don't look too bad for 110K mile shells. In any case, was a good call to do it.





Getting ready to put new bearings in:



All buttoned up:





Overall, huge relief and peace of mind going forward.
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Old Fri, Aug-17-2018, 06:41:49 PM   #39
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Default Re: I guess its my turn: crappy Blackstone

Looks like they were, indeed, ready for replacement!
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Old Fri, Aug-17-2018, 09:39:14 PM   #40
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Default Re: I guess its my turn: crappy Blackstone

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Looks like they were, indeed, ready for replacement!
Indeed!
I also had them take a sample of the oil, so will see what the readings just before the replacement were. 1069 miles on the oil.
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Discussing I guess its my turn: crappy Blackstone 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)