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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, Oct-22-2016, 01:44:40 PM   #1
HassanEido
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Default Main bearings

So whats the consensus on main bearings? Ive done my rod bearings @130k miles, now 25k miles later i'm regretting I didnt do the mains as well...so your thoughts guys
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Last edited by HassanEido; Sat, Oct-22-2016 at 01:50:51 PM.
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Old Sat, Oct-22-2016, 03:05:12 PM   #2
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Default Re: Main bearings

In for answers.......I noticed also thatq everyone is always talking about rod bearings and not main bearings.

On my engine rebuild to me it seems like the mains are just as susceptible to wear as the rods

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Old Sat, Oct-22-2016, 03:26:38 PM   #3
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Default Re: Main bearings

I did mains on my spare. Rod bearings were showing copper but mains were in near perfect shape. I am not sure how long they should last but I don't plan to do these on my primary engine unless I pull for complete rebuild.


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Discussing Main bearings 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)