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#11
2nd April 2011, 03:51 PM
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If it runs OK standing and low speed but cold at high speed only thing that could be wrong is thermostat stuck open.
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#12
2nd April 2011, 04:59 PM
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It has a new OEM thermostat and water pump fitted. Thermostat is working perfectly.
__________________
 07 Silver D3 A/S8L Quattro  S8 front end, Xenons, Bose, Bluetooth, Voice Control, Autodim mirrors, Heated folding mirrors, Double Glazed Windows, Electric Rear & Side Blinds, Black leather Comfort Seats with front memory seats & mirrors, Front & rear heated seats, Interior/Exterior light pack, TV.I.M, AMI, Parking sensors Front & Rear, Air suspension (soon to be lowered), Keyless entry & Start/Stop, 4 zone climate control, Power Boot Open/Close.
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#13
2nd April 2011, 06:10 PM
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__________________
Conan (the Librarian) Watch it if you dare Currently, 2000 S8, Merlin Purple, Leather Pack 1, Winter Pack 1, SPAX adjustable suspension, AP Racing 6 pot front caliper, 385mm fully floating disks, EBC Yellow Stuff Pads, Black Diamond grooved rear disks and predetor pads, D2 Doctors Brake Block. 1997 4.2 A8SQ - the Projekt. 12 years and ongoing! 1997 4.2 A8SQ - Ming Blue. Restoration sat waiting; saved from the Scrapyard 2003 C5 Allroad 4.2Q - Cobolt Blue. Towing car. Laid up awaiting manual conversion. 2005 C5 Allroad 2.5TDi FE - Grey - Workhorse. 2015 Q3QS SLine - Daytona Grey. Lots of extras! Long Haired Admirals cutter. Previously 2003 C5 A6 1.9TDI FWD - Loaner from D2 Doctor Lifex 1997 S8 - Ming Blue. Loaned out and written off. I loved that car. My first engine swap after cambelt failure. 1996 4.2 A8SQ - Ming Blue. 178k on a cambelt! Trader's 8. Delivered to A8Parts at Lifex. 2003 2.8 A8SQ - powder blueish. Fill in for a while. Sold on. 1998 1.8T A4 Avant FWD. Ming Blue (there's a theme here), PEX for the 97 S8. And a list of non VAG going back 40 years before I saw the light. 
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#14
2nd April 2011, 10:38 PM
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thermostat tested and working correctly
__________________
07 Silver D3 A/S8L Quattro S8 front end, Xenons, Bose, Bluetooth, Voice Control, Autodim mirrors, Heated folding mirrors, Double Glazed Windows, Electric Rear & Side Blinds, Black leather Comfort Seats with front memory seats & mirrors, Front & rear heated seats, Interior/Exterior light pack, TV.I.M, AMI, Parking sensors Front & Rear, Air suspension (soon to be lowered), Keyless entry & Start/Stop, 4 zone climate control, Power Boot Open/Close.
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#15
3rd April 2011, 05:42 AM
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Then that only leave the pixies and a sender!
__________________
Conan (the Librarian) Watch it if you dare Currently, 2000 S8, Merlin Purple, Leather Pack 1, Winter Pack 1, SPAX adjustable suspension, AP Racing 6 pot front caliper, 385mm fully floating disks, EBC Yellow Stuff Pads, Black Diamond grooved rear disks and predetor pads, D2 Doctors Brake Block. 1997 4.2 A8SQ - the Projekt. 12 years and ongoing! 1997 4.2 A8SQ - Ming Blue. Restoration sat waiting; saved from the Scrapyard 2003 C5 Allroad 4.2Q - Cobolt Blue. Towing car. Laid up awaiting manual conversion. 2005 C5 Allroad 2.5TDi FE - Grey - Workhorse. 2015 Q3QS SLine - Daytona Grey. Lots of extras! Long Haired Admirals cutter. Previously 2003 C5 A6 1.9TDI FWD - Loaner from D2 Doctor Lifex 1997 S8 - Ming Blue. Loaned out and written off. I loved that car. My first engine swap after cambelt failure. 1996 4.2 A8SQ - Ming Blue. 178k on a cambelt! Trader's 8. Delivered to A8Parts at Lifex. 2003 2.8 A8SQ - powder blueish. Fill in for a while. Sold on. 1998 1.8T A4 Avant FWD. Ming Blue (there's a theme here), PEX for the 97 S8. And a list of non VAG going back 40 years before I saw the light.
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#16
3rd April 2011, 11:20 AM
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__________________
07 Silver D3 A/S8L Quattro S8 front end, Xenons, Bose, Bluetooth, Voice Control, Autodim mirrors, Heated folding mirrors, Double Glazed Windows, Electric Rear & Side Blinds, Black leather Comfort Seats with front memory seats & mirrors, Front & rear heated seats, Interior/Exterior light pack, TV.I.M, AMI, Parking sensors Front & Rear, Air suspension (soon to be lowered), Keyless entry & Start/Stop, 4 zone climate control, Power Boot Open/Close.
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#17
19th May 2011, 07:46 AM
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Engine running cold
Do these have a viscous fan cos that can sometimes cause the engine to run cold....the only other thing that ever caused an issue for me was a poorly sealed rocker cover on an old e36....but to be honest the only things that can normally cause it are thermostat or viscous fan
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#18
8th December 2011, 06:41 PM
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Hello folks! Did you get any further forward with this A8Chick?
I have the same problem. My 2006 3.0TDI A8 is rather slow to warm up, and never seems to get to 90˚c in fact it seems happier at 60-70˚c. I replaced the thermostat with a genuine one as I know these are known to stick open, no change. Next I replaced the G62 coolant temp sensor to no avail. The Webasto is working fine and I am manually turning it on, but still running cool. The heaters in the car get warm but not hot like my old passat which suggests it really isn't getting warm, but could be a red herring. Any tips? TIA.
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#19
8th December 2011, 06:48 PM
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is the fan on all the time or too much? temp sensor for the fan could be making it overcool the system??
__________________
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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#20
9th December 2011, 03:05 PM
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There is no viscous fan, but there are two well caged and shrouded electric fans and these are both running continuously (abet slowly) from startup, except with the climate control completely off. VCDS shows that they are being told to run by duty cycle, and the Engine output tests speed them up and down correctly. Group 7 also shows oil temp and this a few degrees higher as expected but still cold like the coolant. It would appear that there is only one simplex (two pin grey) coolant temp sensor on this engine. 019 Fan activation\ 1) Coolant temperature\ [\'b0C]\ 2) Air conditioner fan activation\ [%]\ 3) Radiator fan 1 activation\ [%]\ 4) Radiator fan 2 activation\ [%]\ 
Last edited by snapdragon; 10th December 2011 at 01:58 PM.
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