Good thing out of this is there won't be any temptation to not do a full rebuild. That was really my intention all along, but now I have a very strong reason to.
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05 E46 M3 Restoration / Build Thread
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Originally posted by Slideways View PostThose are ARP rod bolts. Did the previous owner mention that he had replaced the rod bearings? I would not expect replacement bearings to fail at 140k.
Rod bearings were never changed from any records I have and I have pretty much everything going back to 2005 (including gas receipts with milage he was getting), so highly unlikely that he did rod bearings and didn't have record of it.
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Someone has been in there. Those are 100% aftermarket rod bolts (ARP).Originally posted by attbimmer View Post
Rod bearings were never changed from any records I have and I have pretty much everything going back to 2005 (including gas receipts with milage he was getting), so highly unlikely that he did rod bearings and didn't have record of it.
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Well pulled it off and sure enough these are not factory rod bearings. Odd that there was no record of them being done given all the records I got. They are ACL bearings. Perhaps they failed at some point and someone just tried replacing the bearings without taking out the crank and having it checked.
The bearing was not spun, which I guess is good, but was very worn. Here are some pictures. Rod and crank don't look that bad and you can't feel any damage, but I know that doesn't mean they are good. Top half of the bearing had no copper left at all in the middle. Lower was all copper. Will get it out and sent off to get checked. Luckily I have an excellent crank shop (Marine Crank) just a few miles from my house.



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