Frontier 2WD V6-3.3L SC (VG33ER) (2004)
Thermostat: Service and Repair
Removal
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Be careful not to spill coolant over engine compartment. Use a rag to absorb coolant.
1. Drain engine coolant.
2. Remove radiator hoses (upper and lower) and fan shroud.
3. Remove drive belts and pulley bracket.
4. Remove water inlet and thermostat assembly.
Inspection
1. Check the thermostat valve seating condition at ordinary room temperature. The valve should seat tightly.
2. Check valve opening temperature and valve lift.
3. Check if valve closes at 5°C (9°F) below valve opening temperature.
Installation
1. Use a scraper to remove old liquid casket from water inlet and engine mating surfaces.