C 2500 Truck 2WD V8-5.7L VIN R (1997)
Thermostat: Service and Repair
REMOVE OR DISCONNECT
1. Drain the cooling system until the radiator coolant level is below the thermostat.
2. Bolts or studs.
3. Coolant outlet.
4. Thermostat from its housing.
5. Gasket (if necessary).
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Clean thermostat housing and coolant sealing surfaces.
INSTALL OR CONNECT
1. Thermostat in its housing.
2. New-gasket into position (if necessary).
3. Coolant outlet.
4. Bolts and studs.
Tighten
Tighten bolts and studs to 28 Nm (21 ft. lbs.).
5. Fill the cooling system.
6. Start the engine and run with the radiator cap removed until the upper hose becomes hot (thermostat is open).
7. With the engine idling, add coolant to the radiator until the coolant level reaches the bottom of the filler neck.
8. Radiator cap to the radiator, making sure the arrows line up with the overflow tube.
9. Check for leaks