Hi all,
Since I've had my 1991 1.6 MX5 (just over a year now) when I get it up to
80/90mph in hot weather the temperature gauge goes up noticeably higher, to about 3/4 of the range (as opposed to about 1/3 otherwise). If I slow down the temperature goes down again, as it also does if I turn the internal heating up full blast which, I guess, allows some of the hot air to be drawn away from the engine. I've put in a new thermostat and have flushed the radiator but neither of those have helped. Could it be that the radiator just needs replacing? I would have thought that flushing it out would get rid of any possible blockage, plus that if there was a blockage it would cause the engine to heat up pretty quickly regardless of speed and external temperature, but who knows. Has anyone else had this problem?
Thanks
Eric