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billydean335 billydean335 is offline
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Join Date: Dec 2019
Car: 2008 BMW 335i
Default Popped Motor? Steps to Diagnose. - 07-21-2020, 11:04 AM

Hi everyone!

I "Blew" my motor in January of this year.

After doing some research on other issues causing the symptoms my car is having, I'd like to be 100% certain that it is case.

My car has a loud ticking noise. Louder than normal. Looked up a video of a spun rod bearing and it does not sound like that at all. Black smoke coming from exhaust. Rough Idle.

If no metal shards or shavings are in the oil/oil filter, would that mean that my issue is coming from somewhere else?

Possibly injectors? Lifters?

Just looking for some advice on steps to take in order to really determine if my motor needs to be replaced, Thanks!


2008 BMW 335i
FBO JB4 + E85 BEF & XHP STage 3
Tomioka 15ts, VRSF 2" Inlets. E40.

Cosmis Racing XT-005R 18x9 Squared

Federal 595 255-35-18 Squared

Stock M-Sport Suspension
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iminhell1 iminhell1 is offline
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Posts: 348
Join Date: Jul 2015
Car: 2010 135i
Default 07-21-2020, 03:16 PM

Black would be lots of unburnt fuel.
Could be stuck injector dumping fuel in. Unplug them one by one and see if you can get clean exhaust once.

But first I'd do a compression test. If you get one that's low (not zero or teens) could the wall washed and the rings can't grab (rings need oil to seal, fuel washes away the oil).


2010 135i auto,
2020 mods: Speedtech S366, VTT DBBL, PR Coils, dual 450's, etc
Best stock turbo 1/8 mile: 7.469 @ 98.56, 1.769 60'
Best stock turbo 1/4 mile: 11.480 @ 121.79 1.802 60'
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