- New thermostat (check your owner’s manual for the correct part)
- A set of wrenches
- A screwdriver
- A socket wrench set
- A funnel
- Coolant (check your owner’s manual for the recommended type and amount)
Step 1: Park your truck in a level spot and turn off the engine. Allow it to cool down completely.
Step 2: Open the hood of your truck. Remove the negative battery cable to disconnect the power supply.
Step 3: Locate the thermostat housing. It is usually a cylindrical metal housing located at the front of the engine block.
Step 4: Use a wrench to loosen the bolts holding the thermostat housing in place. Note: Be careful not to drop the bolts into the engine.
Step 5: Remove the thermostat housing and pull out the old thermostat. Be careful, as the coolant will likely leak out when you remove the thermostat.
Step 6: Clean the thermostat housing and mating surface on the engine block. Remove any old gasket material or debris.
Step 7: Place the new thermostat in the housing. Make sure the gasket is properly seated between the thermostat and housing.
Step 8: Replace the thermostat housing and bolts. Tighten the bolts until they are snug.
Step 9: Refill the cooling system with coolant using a funnel. Add the coolant until it reaches the “full” mark on the coolant reservoir.
Step 10: Reconnect the negative battery cable.
Step 11: Start the engine and let it run for a few minutes to circulate the coolant and check for leaks. Make sure the thermostat is working properly.
Tip: If you cannot locate the thermostat housing or are unsure how to complete any of the steps above, consult your vehicle repair manual.
