Black smoke and loud banging from engine is my x5 dead?

Rockstarsi · #1 08-21-2016, 09:28 AM

Set of driving today and car suddenly made a large knocking noise from engine followed by black smoke out of engine. Is it dead ?

bcredliner · #2 08-21-2016, 09:36 AM

Not enough information

Rockstarsi · #3 08-21-2016, 09:43 AM

Cars run fine for last two years no engine issues at all. No loss of power. Car is 3.0d e53 on 02 plate.

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deepblonde · #4 09-07-2016, 07:08 AM

Quote:

Originally Posted by powers1

Now the fact OP reported a knocking noise that has since cleared (has it actually cleared when he drives the car or has he driven it?),suggests the possibility that there could have been an exhaust blockage,like a broken catalytic converter loosing parts out to rear of exhaust system..

All these possibilities are very common ,not just on the M57 ,but until we get some more feedback from OP we really cant say!

Quote:

Originally Posted by Rockstarsi

Not a rubber smell. More oil fuel smell. I thought it came from engine bay and exhaust but can't be 100% sure all happened so fast.

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Quote:

Originally Posted by Rockstarsi

Took it for a drive today. After a oil /air service engine seems as sweet as ever. No power loss. No noise. At a loss as to why it was. Can only think it sucked something up in the engine oil or fuel system. Interestingly mpg has improved

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Quote:

Originally Posted by wpoll

Especially since no E53 has swirl flaps!

Yeah, I know, the internet is full of information that states that all M57 engines do have swirl flaps but in truth, for some reason, BMW never shipped any M57 equipped E53 with flaps of any sort.

Thanks goodness!

Quote:

Originally Posted by Rockstarsi

Cars run fine for last two years no engine issues at all. No loss of power. Car is 3.0d e53 on 02 plate.

If the noise is now gone and the MPG has improved perhaps it was just the cat and some piece of it went out the tailpipe (easy decat!) or is lodged now in one of the rear mufflers?

You could check to see if exhaust is coming out of both tailpipes now?

Would still probably run ok with one of the rear mufflers blocked,
as most of the restriction is in the single Cat anyway.

Oh, and wpoll is right, no e53 diesel ever came with swirl flaps

Rockstarsi · #5 08-21-2016, 09:44 AM

Car still starts and runs but loud noise so turned it straight off. Sounds like noise coming from engine

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upallnight · #6 08-21-2016, 10:48 AM

Oh it's a diesel. Not going to find a lot of help from this side of the pond since diesel X5s for this model wasn't sold here.

bcredliner · #7 08-21-2016, 11:19 AM

Was the engine running rough when this happened? Might be able to help if you record and post the sound but depending on where the sound is coming from it could make things worse. Any symptoms prior to this happening?

Rockstarsi · #8 08-21-2016, 11:45 AM

I've had car recovered. Engine was running sweet prior to this. No power loss no signs of problem with the exception of the light rattle when idle in drive when car is stationary. Here's the odd thing. I've had it recovered back to my house. Started it up to steer it onto the drive and no noise. No smoke ??? What is going on ? Dare to take it anywhere now incase it happens again and costs me a second recovery

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bcredliner · #9 08-21-2016, 11:54 AM

Time to read codes.

Rockstarsi · #10 08-21-2016, 12:20 PM

Could a locked up drive shaft do this

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