Question about Mitsubishi Montero
The best way to check a thermostat is to put it into a container of hot water with a thermometer and watch to see if it opens. The opening temperature is usually stamped on the thermostat somewhere. If you'd rather not remove the thermostat from the vehicle, you can run the engine for 5 minutes and see if the electric cooling fan cycles. Most V6 motors will reach operating temperature by then in springtime weather. Can't really do that if the fan is mechanical (attached to the motor). If Your temperature needle on the dashboard hasn't moved at all by 5 minutes, you either have a bad temperature sensor or the thermostat is stuck open. To rule out the temperature sensor, feel the upper radiator hose. If the hose is hot, your sensor is bad or has a bad connection. If the hose is cold, your thermostat is probably stuck open. If the thermostat is stuck closed, you'll usually have overheating and boil-overs from the coolant tank. Hope this helps.
Posted on May 13, 2014
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Posted on Jan 02, 2017
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