Quote:
Originally Posted by carl81
Only once driving on a bypass (so not in traffic) did it begin the creep up. That’s the opposite to what my brain tells me when I think of how engine cooling works.
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Maybe with an old-school engine that gets cooled by passing airflow, but a big V8 is tightly packed in and needs help!
On the bypass it's generating a hell of a lot more heat internally than just ticking over idling, that has to be taken away somehow.
I recall when I first got an S8 and opened the bonnet after my first drive round how unbelievably hot it was under there and for how long, but that's normal.
It sounds like something may not be 100% but nothing like as bad as you seem to suspect.
At the end of the day if it all works as expected is there anything to worry about. e.g. Does coolant boil out of the expansion tank, does the engine run rough when cold or hot?
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2003 D2 FL S8. Irish Green Pearl/Beige. Solar sunroof, auto-dim mirrors, electric rear seat functions, ski hatch retrofit; extended leather. Aftermarket DVB-T, reversing camera and full XCarlink (Bluetooth etc.).
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".  (A much rarer model than a D2 S8 by the way!) 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. AgateGrey/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, Auto-dim mirror, Leather, 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!
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