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#11
27th January 2010, 09:06 PM
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A8 3.7
Thanks for that! Noise seems to be located in the valley of the V8, slightly more towards the pass. side. right at the front. I looked for the tensioner to see if it was steady or not but couldn't find it. Where is it?  Do you need to look from the underneath? My car still has its undertray. 
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#12
28th January 2010, 08:13 PM
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just a small point....as far as i'm aware wd probably isn't the kindest thing to get on rubber components, it might weaken the belt? or if it's thrown about might get on coolant hoses and such? i recall someone once telling me to avoid getting it on brake flexihoses, they could have been mistaken and misinformed but i'm always careful using it near any pipe work, it is a petroleum distillate of somekind after all!
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#13
29th January 2010, 09:54 AM
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B@fink
Yes. that crossed my mind too. Back inthe day, when I was a car salesman, we used to scoosh it on squeaky fanbelts, which it would silence instantly. The noise was driving me mental though! 
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#14
29th January 2010, 03:29 PM
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in't mill, where i used to work back in the day, we used to have something called belt dressing spray for such things. It was stuff specifically for belt driven pumps to sort squeeky v belts that were driven by big hooooooge electric motors. I don't know whether such a thing is available or indeed suitable for in an engine bay but that might be a better option?
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#15
3rd February 2010, 11:18 PM
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Dammit. the WD-40 must be wearing off as she's doing it again!
Almost like a 'honk', when heard from the outside. Help!
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#16
5th February 2010, 02:58 PM
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Hi as the noise is back remove the engine under shield and listen around the air con compressor area with the engine running switch the air con on and off to see if the noise goes and comes back. There is also an idler next to the air con compressor check this with the engine not running by grabbing it and rocking side to side for any movement if you can slacken the belt all the better you can then just spin it and if it sounds rough like a slight grating noise that may be the problem. The idler is available from any motor factor about £20 the air con compressor poss £300 plus. Hope this helps
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#17
10th February 2010, 01:09 PM
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Thanks Amigo
The idler sounds a likely candidate. The a/c makes no difference (thankfully!)
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