Checking the Thermostat

Checking The Thermostat







- Let the engine cool down so that a hand can be put on the cylinder head without getting burnt.







- Check the temperature of the cylinder head with an external temperature gauge.







- Start the engine and run it at idling speed.
- Check by feeling the upper radiator hose close to the thermostat housing, making sure that it warms up quickly when the coolant temperature reaches 89 °C and the thermostat opens.
- The coolant temperature should after this remain relatively constant, approximately 85-95 °C for a minute or so.

Is the function correct?

NO - Changing Components - II

YES - Checking the Sensor's Grounding - I