540i engine noise

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   Over the past few weeks I have heard an occasional scrapping sort of sound from the front of my engine. However its stops for days sometimes but as I had my diagnostic stuff plugged into day I had teh engine idleing for some time and tracked it down to the are of the water pump or the termostat housing.
It only does the sound when idling as soon as the revs are lifter it stops.If I hold the ater pipe from the top hose I can sort of feel the noise, I know the water pumpm and the electric thermostat can have issues, just passed the 113k mark on a T plate will no major issues in its lifetime. Anyone had a similar noise, alost like a dry pulley wheel, can the thermostat make a noise? if it is the pump would it not get noiser as the revs were raised?
Thanks in advance
Jeff TT

Edited by Jeff TT

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Jeff TT Members Profile Send Private Message Find Members Posts Visit Members Homepage Add to Buddy List Groupie Joined: 20-August-2004 Location: United Kingdom Status: Offline Points: 93	Post Options Post Reply Quote Jeff TT Report Post Thanks(0) Quote Reply Topic: 540i engine noise Posted: 03-March-2011 at 18:58
	Over the past few weeks I have heard an occasional scrapping sort of sound from the front of my engine. However its stops for days sometimes but as I had my diagnostic stuff plugged into day I had teh engine idleing for some time and tracked it down to the are of the water pump or the termostat housing. It only does the sound when idling as soon as the revs are lifter it stops.If I hold the ater pipe from the top hose I can sort of feel the noise, I know the water pumpm and the electric thermostat can have issues, just passed the 113k mark on a T plate will no major issues in its lifetime. Anyone had a similar noise, alost like a dry pulley wheel, can the thermostat make a noise? if it is the pump would it not get noiser as the revs were raised? Thanks in advance Jeff TT Edited by Jeff TT


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Howard Members Profile Send Private Message Find Members Posts Visit Members Homepage Add to Buddy List Moderator Group Did I say thaaaat? Joined: 14-October-2002 Location: United Kingdom Status: Offline Points: 735	Post Options Post Reply Quote Howard Report Post Thanks(0) Quote Reply Posted: 03-March-2011 at 22:20
	Odds are its the water pump on its way out, though the fan coupling can make a creaking noise sometimes. The noise would change in both cases due to rising revs.If your engine is running a bit warmer than usual, that would firm it up.
	1963 700 LS 1988 635 CSi 1990 M635 CSi no longer! 2001 E38 728i Individual http://www.tyneships.co.uk