Airdriver
Member
L3650 is overheating both at idle and when working. Temp indicator goes about 7/8 way to red. I replaced the thermostat and fan belt. Radiator fins are clean outside. Inside some (30%) thin white scale. All tubes open. No leaks from water pump, but there seems to be no flow from the engine into the radiator. Temp of coolant at top of radiator measured with a candy thermometer was barely 150F when tractor temp indicator was near red. I boiled the thermostat before installing it and it works fine. Could the pump be bad with no other indications? Or could there be something else about the thermostat I don’t know? No immediate indication of head gasket leaks or cracks- no bubbles in coolant, no excess smoke when under load. I’ve owned this 15 yr tractor about 6 months. Thanks, Hal /forums/images/graemlins/confused.gif