You will need:
- A new thermostat (be sure to get the correct size for your vehicle)
- A new gasket
- Thread sealant
- A ratchet set
- A screwdriver
- A pan to catch coolant
Step 2: Prepare the vehicle.
- Park the vehicle on a level surface and turn off the engine.
- Allow the engine to cool down completely.
- Disconnect the negative terminal of the battery.
- Drain the coolant from the radiator by opening the petcock at the bottom of the radiator.
- Catch the coolant in a pan.
Step 3: Remove the old thermostat.
- Locate the thermostat housing on the front of the engine.
- Remove the bolts holding the thermostat housing in place.
- Remove the thermostat housing and gasket.
- Remove the old thermostat from the housing.
Step 4: Install the new thermostat.
- Apply a thin coat of thread sealant to the threads of the new thermostat.
- Place the new thermostat in the housing.
- Install the new gasket.
- Replace the thermostat housing and bolts.
- Tighten the bolts until they are snug.
Step 5: Refill the coolant.
Replace the radiator cap. If you cannot refill from the radiator, you can use the coolant reservoir tank.
Check the coolant level in the radiator.
Add coolant as needed until the level is full.
Step 6: Test the thermostat.
Start the engine and allow it to warm up to operating temperature.
Feel the upper radiator hose. It should become hot as the thermostat opens.
If the upper hose does not get hot, the thermostat may be stuck closed.
If the upper hose becomes too hot, the thermostat may be stuck open.
Step 7: Reconnect the battery negative terminal.
Reconnect the negative terminal of the battery.
Start the vehicle and check for any leaks.
