New A3.. low volume whistling noise when engine is idle

Hi,
My 2004 Audi A3 1.6 FSI (roughly 7200 miles on the clock) produces a low volume whining noise when the engine is idle. It's almost like a light
whistling noise when the car is reving around 750 rpm. If I apply slight power (without it being in gear), the whistling goes and returns when the engine returns to idle.
This only seems to happen when the car has been running for an hour or so or more. Any ideas what this might be please?
Thanks in advance.
..Ray
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It forgot the words?

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David, Good one. Ray, The whistling noise may be a belt - I've heard that overly tight timing belts have been described as making a whining or whistling noise. You might ask the service techs at the Dealer when you next have it in there. Cheers! Steve Sears 1987 Audi 5kTQ 1980 Audi 5k 1962 and '64 Auto Union DKW Junior deLuxes (SPAM Blocker NOTE: Remove SHOES to reply)

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Thanks Steve. Will check with the service guys in the next week or so. What's strange is that the noise only happens after the engine has been running for a while.. could this be temperature related? Also, it's only started recently, and I've had the car for 8 months or so now.
Thanks again.
..Ray
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Warm up the engine until the whistling starts then run some simple diagnostics.
1. Does it stop if you park the car or does it continue if you idle. Rev the engine if it doesn't happen when you are idling.
If only occurs when moving, then it is either air, or transmission drive line. does it only occur if you turn the steering wheel? Then Steering pump or belt Does turning on the air conditioner provoke it.
If it occurs with the car idling then try to find where it comes from by looking under the hood/
Have you checked your fluids, eg power steering fluid?
Vacuum leak?
Once again, if all else fails, teach it the words.

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Thanks David. It doesn't occur when in motion, only when stopped. It does persist when leaving the engine idle for a while (15 minutes), but each time a rev is added, it goes until the revs drop to idle again, at around 750 rpm or so.
Also happens regardless of whether the steering is moving or not. Power steering fluid is okay, will check for leaks and other stuff too though. I get the feeling that it might indeed be a belt as Steve suggested earlier, as when I shut down the engine, the whistling "tone" dies with the engine, as if it was caused by something rotating (sorry, not a great description, I know..). Will probably drop it down to the Audi guys to check it out.
If I'd known what song it was whistling I'd teach it the words too.. ;)
Cheers.
..Ray
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<snip>

"...ive gooot youuuu...under my...*ermm*...belt!?"
Nahh...that was a bad one. ;o)
--
Gio



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LMFAO
:-)

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