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voxpop View Drop Down
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Joined: 19-January-2010
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    Posted: 04-August-2010 at 13:53
Hey Guys, bit of a strange one - only when the engine is initially put under load, a squeal can be heard. Happens when taking off in first or in reverse. Tested by leaving handbrake on and slow releasing the clutch - as soon as the clutch begins to bite - squealing noise - once the car has got going, no noise.

Any ideas - thought it might be belts - but surely if a tensioner was going, the belt would squeal all the time ?
E39 523i
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afsar View Drop Down
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Points: 172 		Post Options Post Options   Thanks (0) Thanks(0)   Quote afsar Quote  Post ReplyReply Direct Link To This Post Posted: 04-August-2010 at 16:57
Spray WD-40 on the belts to rule-out belts squeaking.Won't cost more then few quids to try this.
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Points: 45 		Post Options Post Options   Thanks (0) Thanks(0)   Quote voxpop Quote  Post ReplyReply Direct Link To This Post Posted: 04-August-2010 at 19:34
Thought it was a bad idea to put any solvent based lubricant on belts ?


Do the belts come under extra load when driving off in first / reverse ?
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Points: 5445 		Post Options Post Options   Thanks (0) Thanks(0)   Quote UweM3 Quote  Post ReplyReply Direct Link To This Post Posted: 04-August-2010 at 20:28
Originally posted by afsar afsar wrote:

Spray WD-40 on the belts to rule-out belts squeaking.Won't cost more then few quids to try this.


I wouldn't use WD40 for a SLIPPING belt. You want to stop it slipping, not supporting it

I have a can with "belt dressing" for this but I am not sure this is available in the UK. Got it from a friend in the US.
E61 520d, slow and buzzy but my wallet likes the mpg.....
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Points: 45 		Post Options Post Options   Thanks (0) Thanks(0)   Quote voxpop Quote  Post ReplyReply Direct Link To This Post Posted: 05-August-2010 at 08:50
The thing is im not sure its a slipping belt - why would it only slip when i start to move in first/reverse. I would have thought that a slipping belt would slip all the time ?
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jetsetwilly2000 View Drop Down
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Points: 701 		Post Options Post Options   Thanks (0) Thanks(0)   Quote jetsetwilly2000 Quote  Post ReplyReply Direct Link To This Post Posted: 05-August-2010 at 09:42
So it only happens when the clutch is partially engaged?  I'd start with the clutch.  Thrust bearings usually growl but could it be that?
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Points: 45 		Post Options Post Options   Thanks (0) Thanks(0)   Quote voxpop Quote  Post ReplyReply Direct Link To This Post Posted: 05-August-2010 at 09:52
Kinda ruled out the clutch. It will happen with the clutch fully out, but at low speed - say coasting along in first at low speed and you give it a little gas - you get a short bout of squealing or slowly coming to a steep hill and starting to climb it - squeal until you give it extra gas.

Its like when the engine is initially put under load - it squeals a bit


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