Volkswagen Passat (2001 - 2005) - 04 TDI 130 whistling noise

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Mon 31 Mar 2008 19:52
04 TDI 130 whistling noise - nkosibob
2004 tdi 130----when I de-celerate to change gear I hear a real funny sort of whistling noise from under the car, only lasts a few seconds---but it's really annoying. The car's performance is not impeded although my fuel consumption dosen't seem to be all that good---maybe just the cold air of recent weeks---when I rev the engine up and let go the throttle, the decrease in rpm is much slower that when in driving mode, but I can still hear the whistle so it is nothing to do with the clutch, has anyone any ideas on this beauty

rob

engine and year details edited into the subject lines, this is a new system* aimed at trying to help casual readers asses at a glance what the question is about

* in glacial terms

Edited by Pugugly on 31/03/2008 at 19:58

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Mon 31 Mar 2008 21:00
04 TDI 130 whistling noise - Screwloose
bob

It's a common TDi complaint; likely to be the over-run clutch on the alternator.

Not necessarily a fault; more of a characteristic.
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Mon 31 Mar 2008 22:39
04 TDI 130 whistling noise - 659FBE
I'm a little doubtful of this.

Try the car firstly with no electrical load and then with all lights + window & mirror heaters on. The overrun clutch will not disengage under load.

659.
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Mon 31 Mar 2008 23:12
04 TDI 130 whistling noise - oilygezzer
it could be alternator over run clutch but is could be a loose or split turbo/intercooler pipe...
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