occasionally getting too hot..
running good 3 core radiator just checked by radiator shop and given the all clean/clear while it was out for a paint,tridon tt2023-180 thermostat,5000 km old engine,16 inch thermo running full time. new coolant
temp generally sits nicely on 1/4 to 1/3 on the standard guage, every now and then it gets too hot, today for instance fairly hot here in perth,was running nice and cool, park car, start up 10 mins later and its up to 2/3 by the time i get out of the car park.
any ideas ? is this the correct thermostat?