hey guys i got my 1982 hilux and latly when i got over 90 kph it starts running hot. I have replaced the radiator water pump, Thermastat, heater hoses, and Radiator hoses. but for some reason i keep overheating once i go above 90 kph but for some reason if i sit at 85 i dont have a problem and it runs at 79 degrease celcious. can anyone give me any pointers on what to do as i cant fix this problem thanks. Regards Kyle