Thermostat: Testing and Inspection

Inspection
1. Check valve seating condition at ordinary room temperatures. It should seat tightly.
2. Check valve opening temperature and maximum valve lift.
3. Then check if valve is closed at 5°C (9°F) below valve opening temperature.

^ Apply a continuous bead of liquid gasket to mating surface of water inlet.
^ After installation, run engine for a few minutes, and check for leaks.
^ Be careful not to spill coolant over engine compartment. Use a rag to absorb coolant.