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.
Sent from my iPhone using Tapatalk
|
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
Sent from my iPhone using Tapatalk
|
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
