On Thu, 7 Apr 2005 20:18:16 +0100, "90ninety"
> When running at speed (60 - 70 MPH) for 10mins or so the temp gets very
>near the red, but no further.
>When I slow down to 40 - 50 MPH the temp wil still stay near the red for 5
>or 6 minutes then it suddenly plunges to below half way!
>Transition from near red to below halfway take a couple of seconds.
>I have my own ides of possible causes - but don't wish to appear stupid
>before those of greater knowledge!!!
>This weekend I intend to give the rad, heater etc a good flush and new
>Any other ideas chaps?
>All help appreciated - Stew.
My 2.5 n/a runs around half on the guage all the time, slightly below
half on regular 50mph ish, if I'm gunning it (65-70 on motorways) the
guage will be slightly over half, ditto if I'm driving
enthusiastically off-road or on windy backroads.
I would expect you to be running hotter at 70mph because a 2.5 n/a is
working very hard there.
Faced with your symptoms I'd overhaul the cooling system, drain and
flush the block and radiator, new thermostat, nice new 50/50 coolant
mix (10.8 litres) and if that didn't solve the behaviour and the
radiator didn't look too rough (missing fins etc) then I'd look at the
sensor for the temp guage.
in my humble opinion, if following my advice kills your engine it's
not my fault, etc etc etc.
1984 110 CSW 2.5(na)D
(3,000 rivets flying in close formation)
charity calendar project -
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