Concur, plus, likely causes are not changing the coolant at specified=20
time and if added water, it was not pure enough. Also, possible are=20
defective thermostat, a hose that the liner has come loose and=20
collapsed. Did you verify the sensor is accurate.

Fan belt can be quiet and slipping either due to tension or worn pulley.

A rich mixture burns cooler, a lean mixture burns hotter. What are=20
sparkplug colors? Are they light gray/brown, no burnt electrodes, all=20
similar colors? If there is a fan clutch ,not likely unless overheating=20
when slower speeds

On 06/16/2011 05:00 AM, alan.b.pearce@stfc.ac.uk wrote:
>> Deposits in radiator are clogging it, reducing flow rate.
> That would be my bet. New radiator, or find a radiator specialist who wou=
ld unsolder the top and bottom tanks and rod out the tubes. Had the latter =
done one on a car I had, and it made a world of difference.
--=20
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