1995 nissan pick up truck overheats when going uphill
Vehicle: 2x4, 4 cylinder 135000 k.
When going uphill (very moderate hill in city) temperature gauge shows increase from cold to hot and I can smell rubber.
Fanbelt, alternator belt and power steering belt are in perfect condition.
cooling fluid ok.
Could it be the thermostat?
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If your vehicle doesn't actually overheat, just getting hot, I think that's the normal behaviour for these cars. My 03 AWD behaves the same way. When driving uphill, especialy when towing, the temperature rises close to the red marking, but I have never experienced it overheating. I think that the temperature has to rise much over the normal driving temperature to activate the two electric fans.
When you pointed uphill the vehicle or downhill how much fuel do you have in the tank? If is low,surely one reason is the fuel capacity in the tank and it is not enough for the fuel pump pick up to reach.
Its overheating when you go up long hills because the engine is not getting adaquete air in the system. The radiator is angled to get optimal air a certain way. It may overheat but you shouldn't start seeing smoke.