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      06-21-2024, 09:45 AM   #1
JeffM2PRDallas
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M2 N55 Recommended Rod Bearing

I'm looking for some advice on replacing the rod bearings on my M2 N55, which has 29k miles on it. It's seen a lot of track abuse.
Do you have any recommendations for brands? Also, can I stick with the standard size bearing, or should I be looking at other options given the track use?

Than you for your help in advance!
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      06-24-2024, 06:11 AM   #2
oldbmwtech
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Quote:
Originally Posted by JeffM2PRDallas View Post
I'm looking for some advice on replacing the rod bearings on my M2 N55, which has 29k miles on it. It's seen a lot of track abuse.
Do you have any recommendations for brands? Also, can I stick with the standard size bearing, or should I be looking at other options given the track use?

Than you for your help in advance!
Why do you want to replace the rod bearings? Is your engine knocking? Also, without disassembling the engine and taking measurements you won't know what size bearing you will need. Doing this would be a complete engine rebuild.
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      06-24-2024, 04:20 PM   #3
chris719
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Quote:
Originally Posted by JeffM2PRDallas View Post
I'm looking for some advice on replacing the rod bearings on my M2 N55, which has 29k miles on it. It's seen a lot of track abuse.
Do you have any recommendations for brands? Also, can I stick with the standard size bearing, or should I be looking at other options given the track use?

Than you for your help in advance!
You'll get better advice on the F87 forums. I'm not sure if I'd be looking at doing rod bearings at 29k unless it's all track time or something. You should find a good shop with experience that can advise you as to what they do on N55s. OEM bearings are color coded and will require you to read the color coding sequence printed on the block I believe.
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      06-25-2024, 07:46 AM   #4
BG42
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The real answer is b58/s58 swap.
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