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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 Tue, Nov-28-2017, 02:15:09 PM   #51
bimmerfan08
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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
The substances being measured accumulate in the oil over a period of usage...mileage in this case. Its hard to say but I would think that blackstone can help with that analysis. You're not using blackstone to run oil samples because you can get it done for less with more detail elsewhere. You want access to the analysis of the data which they should have a really good handle of.

I did an analysis of 1000 mile old oil and the made the analysis from the elevated copper reading that my rod bearings were about to go. By the time I received the report, I had spun my bearings at the track the day before.

Running the motor to failure at this point isn't a terrible idea. You can get a used motor for about $3500. As long as that used motor is good and you only throw rod bearings, VANOS rebuild, and a valve adjustment at it...you can part our your blown motor and maybe get to about the same financial point as just doing the rod bearings now assuming you DIY everything.

Hindsight is 20/20 but if you pull the oil pan its not a bad idea to do rod bearings.
Except if more people started doing this, the price of used S54s wouldn't be $3,500 anymore.
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Old Tue, Nov-28-2017, 06:32:55 PM   #52
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Default Re: Rod bearing pics - 2004 M3 motor w/93k miles

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The problem with that is that most motors seem to come with some sort of undocumented issue. Most people I know that swap motors have a significant issue again shortly thereafter. Sometimes the devil you know is better than the devil you don't.

Which is why I like to do oil analysis at every oil change. Spot a change in the trend-- address it before it's an issue. E.g. your lead levels would have elevated long before your copper levels did, had you been doing oil analysis all along-- then you would been out a couple hundred for a DIY rob bearing change instead of $3500 for an engine, plus all the lock downs again. And rod bearing wear is just one of many issues oil analysis can tell you about.

I would not count on blackstone's analysis of levels-- their knowledge is much more general instead of s54 specific.

Besides rod bearings and VANOS, havenít seen many motors with other issues. The motor will probably have caked on oil on the front timing cover but the point is you donít need to obsess about the rod bearings.

If the motor fails then itís not the end of the world. I wouldnít do much beyond the occasional oil analysis every 2-3 oil changes and then pop off the valve cover once in awhile.


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Old Tue, Nov-28-2017, 06:34:20 PM   #53
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Default Re: Rod bearing pics - 2004 M3 motor w/93k miles

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Originally Posted by bimmerfan08 View Post
Except if more people started doing this, the price of used S54s wouldn't be $3,500 anymore.

True but I think weíre a long way from that. S54s arenít flying off shelves at $3500.


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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)