Xterra 2WD V6-4.0L (VQ40DE) (2006)
Thermostat: Service and Repair
WATER INLET AND THERMOSTAT ASSEMBLY
REMOVAL
1. Completely drain engine coolant.
CAUTION:
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Perform this step when engine is cold.
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Do not spill engine coolant on drive belts.
2. Remove air duct and air cleaner case.
3. Disconnect radiator hose (lower) and oil cooler hose from water inlet and thermostat assembly.
4. Remove water inlet and thermostat assembly.
CAUTION: Do not disassemble water inlet and thermostat assembly. Replace them as a unit, if necessary.
INSPECTION AFTER REMOVAL
1. Check valve seating condition at ordinary room temperatures. It should seat tightly.
2. Check valve operation.