geeves wrote:Lay money on viscous fan. My Wizard did the same thing Open road speeds good as gold but stuck in slow traffic on a skifield road the temp went off scale. It did have an aftermarket grill on which got binned that evening and it was better but still overheating. When hot the fan turned easily by hand. New fluid in the fan and problem gone
Second option bad water pump. The impellor fins can corrode esspecially if you havnt kept the antifreeze up to spec This causes reduced water flow
third option bad thermostat ie not opening fully Easy to test in the wifes best saucepan on the stove
Otherwise advanced or retarded injection timing
turnturn wrote:Have you considered fitting an aftermarket temperature gauge to confirm that the temperature is getting into an area of concern?
geeves wrote:for a temp answer try a touch test.
if you can hold your hand for more than 5 seconds on the radiator its about 80C (plastic tank) If your lucky enough to have metal tank this is 70C
Same on thermostat housing
If you can touch but not hold your hand on its between 80 and 100
at 100 to about 105 a ball of spit will evaporate in 3 or 4 seconds
above that it will boil quickly
at about 120 it will bounce off the surface
100 at the thermostat housing is pretty much as high as you want to go unless you are really working the engine. (80 to 90 much more reasonable) The radiator should not be this hot unless its not doing its job. You say it was flushed but the fins are not blocked with mud?
If the engine is hot but the radiator quite cold look at your water circulation (pump thermostat etc)
if both hot look at airflow
Whats fuel ecconomy like?
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