ive just recently bought another disco. when i got it, it ran at 1/4 on the temp guage... i know this to be too cold so i changed the thermostat and it runs at halfway now.
driving round town its fine,
out green laning its fine,
go on the motorway or a long run uphill and it starts to overheat. on the motorway i had the heat in the cab turned off and the vents open and it ran over 3/4 on the guage and the warning light flashed. when i put the heat back on in the cab the temp came down again.
its not lost any coolant at all and theres no contamination that i can see in the water or the oil.
i personally think its the head gasket but im troubled because theres no loss of power and no contamination.
could the radiator be clogged with silt or could the problem lie within the incab heating system as it cooled down when i put the heat back on?
i would be very grateful if anyone has experienced similar problems or can point me in the right direction to sorting mine.
many thanks mattyme ](*,) ](*,) ](*,)