Hi All. I know this is a long shot for anyone to identify an engine noise just by listening to a sound bite. The noise is coming from my 3l M54 6 cylinder Z3 (21K on the clock). It is only there on tickover, at about 850 revs it disappears. I don't think it is anything to worry about but would like to know the cause. I have listened carefully but can only tell its coming from the front of the engine. If you listen to the attached sound recording you will hear the noise disappear after 14 seconds as I gently raise the engine speed and come back at 20 seconds. Any help welcome. Hopefully the recording will play if you click on it.
Kind of a rattle on tickover only
- Thread starter Bentley
- Start date
Could be the tensioner or idler pulley bearing for the serpentine belts.
Or viscous fan bearings
Easy way to eliminate is to remove the belt and run the engine briefly without and see if the noise goes away. NOT FOR LONG as there is NO water pump with the belts off.!!!!
Or viscous fan bearings
Easy way to eliminate is to remove the belt and run the engine briefly without and see if the noise goes away. NOT FOR LONG as there is NO water pump with the belts off.!!!!
Radiator fan?
Could be the exhaust manifold heat shield, mine rattles at idle.
Yes.
I'd be tempted to agree with Brian as a starting point. Problem with recordings is that they can make the sound seem worse when listening, but gives a fair idea though.
If you have a can of silicon spray try giving the belt a quick squirt while it's running and making the sound, if it goes away you've found the main area of interest. I does sound like a belt issue to me.
Tony.
Tony.
- Joined
- Oct 19, 2014
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- Model of Z
- 2.2i Sport