Well, I've just carried out the rolled up newspaper test and was able to stop the viscous fan (with the gauge just a tad over 90) with just a little shredding of the paper! And, with the engine off, the fan turns easily by hand with the engine hot and cold. So, a knackered clutch seems to be a probable cause of the over-heating in traffic (and under load on steep hills on warm days), yes? The electric fan is running at 90.
Next question, is it an easy DIY job? And I don't mean easy by MJ's standards! And does anyone have instructions and a part number?
As to the gauge itself, it seems someone was having a laugh with it! It doesn't give you the coolant temperature, even though it could, and the divisions marked on the gauge are what exactly? There are 2 between 50 and 90, I don't know which one is supposed to be 120 and I assume that the red line just means 'oh s**t!' Someone went to the trouble of laying the gauge out with non linear divisions that mean sweet FA, it seems; er, 50,60,70..90? 100,110,120 (maybe),130,140? See photo below:
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2002 Final Edition S8. Ebony black with Silver Grey leather and myrtle wood trim. Current mods: solar sun roof, 20mm rear spacers, 15 mm on front, red brembo callipers, 6k headlights, rear view camera, engine remap, alloy dash dial rings, alloy navi rings, tt/phaeton pedal upgrade, (and custom matching foot rest) dension ipod interface & parrot hands free kit (both fully hidden), av input, tv in motion switched thro' PF switch in blanking plug right of steering column, Audi 'quattro' sill covers, repositioned centre console switches, radio clock, .
Planned mods: auto-dimming rear view mirror, dash cam (as steamship's), fit the ski hatch, refit philips drl's (or maybe not - nope, definitely not - horrible botch!).
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