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Old 02-12-2026, 01:23 PM
Factory6speed Factory6speed is offline
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Location: Pittsburgh, PA
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Quote:
Originally Posted by Salty B. View Post
Ugh. Did it get sucked into the crank seal?

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It doesn't really look like that happened. I got the crank pulley off and don't really see any disturbance to the seal. I'm not sure what I'm seeing in the oil filter. But either way there was a lot of copper, it needs a rod bearing. I'm looking forward to pulling the oil pan to really see.

Quote:
Originally Posted by andrewwynn View Post
I'm not aware of m54 having an issue with swallow serpentine through FMS but I've experienced it happen with the N55.

If you can examine the rod bearings with the engine in place, and especially if you never heard knock, there's a good chance you didn't cause crank damage.

I just did the initial autopsy on wife's n55 that spun 2-3 rod bearings and it looks like the crank survived. Likely needs to be polished and 50% honed just a bit but that can use thicker bearing shells and be restored.

One bearing was worn down to polished copper, but the crazy one: the bearing shells turned enough to overlap and stuck to the crank and spun inside the big end until about 1.3mm wore off the outside of the bearing shells!

The rubber bits kill the engine when they get into the oil galleys and stop the flow. Odds seem good you can clean and change rod bearings.

Where are you located?


–awr–

Using Tapatalk VIP on iPhone

I'm near Pittsburgh. I fixed it in the profile thing

Yeah, I debated hard on just doing the rod bearings in situ, but decided not to. This engine has 140,000 miles on it and really is a bit of a mess from the prior owner. If I did that, knowing my luck, next year I'd have to do the head gasket or something. I haven't driven the car in almost 6 months so I figured let's just pull it out and do this now.

It came out pretty easy. Getting the connectors out of that DME cage was not fun. And the subframe again stuck on the two bushings on the front bolts, and ruined what otherwise would have been a nice graceful pull. I didn't think they would stick as I did the oil pan less than 2 years ago, but they did, I guess i forgot to grease them. The usual coolant everywhere.

Tonight I will tear this apart and try to get it on the stand and maybe down to the crankshaft. I would love to film it all like that guy does, but that's a ton of effort and I don't have a good microphone, sorry. If the bores are looking good and round I hope to avoid the machine shop possibly.

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'05 E53 3.0 6mt
'17 F30 340ix 6mt
'96 E36 328is, in progress

Last edited by Factory6speed; 02-12-2026 at 01:29 PM.
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