RAM 1500 Truck 2WD V8-4.7L VIN N (2002)
Thermostat: Service and Repair
THERMOSTAT
REMOVAL
WARNING: DO NOT LOOSEN THE RADIATOR DRAINCOCK WITH THE COOLING SYSTEM HOT AND PRESSURIZED.
SERIOUS BURNS FROM THE COOLANT CAN OCCUR.
Do not waste reusable coolant. If the solution is clean, drain the coolant into a clean container for reuse. If the thermostat is being replaced, be sure
that the replacement is the specified thermostat for the vehicle model and engine type.
1. Disconnect the negative battery cable.
2. Drain the cooling system.
3. Raise and support the vehicle.
4. Remove the splash shield.
5. Remove the lower radiator hose clamp and the lower radiator hose at the thermostat housing.
6. Remove the thermostat housing mounting bolts, thermostat housing and thermostat.
INSTALLATION
1. Clean the mating areas of the timing chain cover and the thermostat housing.
2. Install the thermostat (spring side down) into the recessed machined groove on the timing chain cover.
3. Position the thermostat housing on the timing chain cover.
4. Install the housing-to-timing chain cover bolts. Tighten the bolts to 13 Nm (112 inch lbs.).
CAUTION: The housing must be tightened evenly and the thermostat must be centered into the recessed groove in the timing chain cover. If not,
it may result in a cracked housing, damaged timing chain cover threads or coolant leaks.
5. Install the lower radiator hose on the thermostat housing.
6. Install the splash shield.
7. Lower the vehicle.
8. Fill the cooling system.
9. Connect negative battery cable.
10. Start and warm the engine. Check for leaks.
