RAM 2500 Truck 4WD V8-5.2L VIN Y (2000)
Thermostat: Service and Repair
WARNING: DO NOT LOOSEN THE RADIATOR DRAINCOCK WITH THE 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.
REMOVAL
Factory installed thermostat housings on 3.9L V-6 or 5.2/5.9L V-8 engines are installed on a gasket with an anti-stick coating. This will aid in gasket
removal and cleanup.
1. Disconnect negative battery cable at battery.
2. Drain cooling system until coolant level is below thermostat. If not equipped with air conditioning, proceed to step number 4.
3. If equipped with air conditioning:
a. Remove the support bracket (rod) located near the rear of generator.
b. The drive belt must be removed. Refer to Engine, Drive Belts, Mounts, Brackets and Accessories.
c. The generator must be partially removed.
Remove the two generator mounting bolts. Do not remove any wiring at generator. If equipped with 4WD, unplug the 4WD indicator lamp
wiring harness (located near rear of generator).
d. Remove generator. Position generator to gain access for thermostat gasket removal.
WARNING: CONSTANT TENSION HOSE CLAMPS ARE USED ON MOST COOLING SYSTEM HOSES. WHEN REMOVING
OR INSTALLING, USE ONLY TOOLS DESIGNED FOR SERVICING THIS TYPE OF CLAMP, SUCH AS SPECIAL CLAMP
TOOL (NUMBER 6094). SNAP-ON CLAMP TOOL (NUMBER HPC-20) MAY BE USED FOR LARGER CLAMPS. ALWAYS
WEAR SAFETY GLASSES WHEN SERVICING CONSTANT TENSION CLAMPS.
CAUTION: A number or letter is stamped into the tongue of constant tension clamps. If replacement is necessary, use only an original
equipment clamp with a matching number or letter.
4. Remove upper radiator hose clamp. Remove upper radiator hose at thermostat housing.
5. Position the wiring harness (behind the thermostat housing) to gain access to thermostat housing.
