#1
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Whining noise in the cabin
So.. I have this kind of whining noise in the car.
It varies in frequency with the engine rpm and also seems to get less audible the more I push the throttle at a constant rpm. It’s not LOUD, so if I listen to the radio I can’t hear it, but it’s still annoying.. If I turn AC off (push econ button) the noise disappears, so.. More likely to be the AC compressor itself or a pulley somewhere ? Car in signature, ‘06 3,0tdi.
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06 A8 3,0TDIq My daily driver and project... 97 A4 1,8Tq. Powered by a 4,2 from the '01 S6, full rollcage, FIA seats and 6-point harnesses, B5 RS4 KW Competition race suspension, B6 S4 brakes, 18" Toyo RS1 slicks, carbon fiber roof. V8 trackday racer 14 VW Caddy 1,6TDI from my employer.. (X)00 A8 2,8q, (X)97 A4 1,8Tq, (X)92 S4 2,2Tq, (X)92 80 2,3E |
#2
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It's not the Mrs, is it?
Sorry. |
#3
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in warm weather I've found the radiator fan runs at quiet high RPM with the AC on that can cause more noise in the cabin, but that is a constant sound that does not vary.
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Manny 2004 A4 1.8T Sport Cabriolet, 89K Miles Past 2004 D3 A8 3.7 Quattro, Xenon, Bose, Blinds, Solar Sunroof, TV, ACC, phone and almost every option. 168K miles rising slowly with retrofit AMI and DVB-T in place of Analogue 2003 Volvo S60 D5 SE Manual, 197K miles. 2001 D2 A8 3.7 QS, Bi-Xenon, Bose, Blinds, Electric Everything, retrofitted RNS-D, 191K Miles |
#4
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Its a common problem - mine had had it since I bought it and is to do with HVAC fans/flaps which, apparently, requires a fair amount of work to replace. There is a thread which I contibuted to so ill see if I can find it.
Edit: This thread touches on it but it does refer to earlier posts on the subject. http://forum.a8parts.co.uk/showthrea...=ghost+machine
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2002 D2 S8 – Ming Blue, Valcona leather, Vavona wood insert, solar sunroof (to be fitted), Heated rear seats, extended leather pack, 18” Avus, ski hatch, Bose, auto dim rear view mirror, rear blind. Last edited by David's8; 5th July 2018 at 02:01 PM. |
#5
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Mine does this. Does my nut in. Was the last thing I thought of. I’d messed with everything before I switched the HVAC off and boom. Silence.
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2010 A8 SE Executive 4.2 FSI D4 2007 Mini Cooper S R56 2008 D3, gone, but not forgotten after 9 years and 90k. |
#6
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The commonest whining noise is the auxiliary coolant pump, but that stays on even if the HVAC is off so it's not that (for a change!).
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2003 D2 FL S8. Irish Green Pearl/Beige. Solar sunroof, auto-dim mirrors, electric rear seat functions and extended leather. Ski hatch retrofit. Aftermarket reversing camera. DVB-T and XCarlink now removed as redundant. 2016 Volvo V40 T5 Cross Country (4WD) with ALL the toys including adaptive cruise etc. etc. Osmium Grey with Blonde/Charcoal leather interior. Polestar performance "optimisation". (Even rarer than a D2 S8!) Oh, and a brand new engine at just under 30,000 miles on the factory one! Finally: gone, but not forgotten..... 1998 D2 PF S8. Agate Grey/Platinum. Every option (I think) except electric rear seats, Tiptronic steering wheel, ski hatch, towbar & dimming door mirrors. e.g. Cruise control, NavPlus/TV, Bose, GSM, Xenons, Solar roof, Parking sensors, Alcantara/leather everywhere of course. (internal dimming mirror added later) 1998 (very early) Ford Focus 1.8 Zetec; ABS/TCS, Heated screen/mirrors, Aircon. Added Auto-dim mirror, Leather seats, Trip computer, Cruise control, OEM Ford SatNav with CD changer. And before that a lot of Rover 800s, a few oddities, a lovely Triumph Dolomite 1850HL with Overdrive and way back in my schooldays an Austin Seven aka Mini 850! |
#7
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Did any of us ever manage to sort this? Still annoys me, (but then most things do).
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2010 A8 SE Executive 4.2 FSI D4 2007 Mini Cooper S R56 2008 D3, gone, but not forgotten after 9 years and 90k. |
#8
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do you have a video of the noise as i have a whining noise that goes with engine rpm also, i think its engine related ie turbo but can't find the location on the noise
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#9
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I’ve just tried to capture the noise. Cycling between HVAC Econ on/off.
Not really found a way yet, to get it to be picked up by my phone’s mic.
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2010 A8 SE Executive 4.2 FSI D4 2007 Mini Cooper S R56 2008 D3, gone, but not forgotten after 9 years and 90k. |
#10
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I'd guess at the magnetic clutch on the aircon compressor beginning to fail, when the econ button is pressed it doest try to engage, but when the aircon is required the magnetic clutch should cause the aircon pump/compressor to drive off the engine/belt. . .
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Confidence is the feeling you have before you know better . . . . Audi A8 D2 3.7 Quattro Sport 1999 FL - Melange 2nd Place Winner - A8-Freunde Annual German Meet 2012 at Edersee 20" x 9" Bentley GTC Wheels with 385mm W12 Front Discs & Bentley Caliper Covers, Front Lowered on Coilovers, Xenons, Combined DRLs and LED Foglights to modified OEM front fog lamp position, Alcantara/Leather, Full Black Alcantara headlining + pillars and blind shelf, Bespoke Flat Bottomed Sports Steering Wheel, Dark Myrtle Wood, Autodim Mirrors, Bose, Blinds, Digital TV, Ski Hatch, Modified rear exhaust section for extra V8 Burble Audi S8 D2 Final Edition 2002, Avus Silver with Red Leather Interior Tiptronic with Sport mode button, Sony rear entertainment package, Bose sound system, Audi Navigation Plus, 20 inch Final Edition alloys, Full Cat Back Stainless Milltek exhaust, giving a great V8 burble Audi A8L D2 4.2 Petrol with LPG - Ebony Black Audi A8L D4 FL 4.0T Petrol twin turbo - Havana Black Audi A2 1.6 FSi Sport - Dolphin Grey with Votex body kit and Red Leather Interior and some other A8's A8L's and Mercs |
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