- New thermostat (OEM or equivalent)
- Thermostat housing gasket (if recommended by the manufacturer)
- Drain pan
- Funnel
- 5/8-inch wrench
- 3/8-inch ratchet with 7mm and 10mm sockets
Instructions:
Step 1: Drain engine coolant
- Open hood and locate the drain plug for the engine coolant. It is typically located on the lower front of the engine block, near the water pump.
- Place a drain pan underneath the drain plug and open it slowly to let the coolant drain out.
- Allow the coolant to drain completely.
Step 2: Remove the thermostat housing
- Locate the thermostat housing on the engine block. It is usually located near the upper radiator hose connection.
- Use a 5/8-inch wrench to loosen and remove the bolts that hold the thermostat housing in place.
- Be careful as the coolant may still be warm, and avoid touching it directly.
- Lift off the thermostat housing.
Step 3: Remove the old thermostat
- Remove the old thermostat from the housing.
- Inspect the old thermostat for any signs of damage or corrosion.
- Clean the housing thoroughly, wiping off any old gasket material.
Step 4: Install the new thermostat
- Check the new thermostat and ensure it matches the old one.
- Install the new thermostat into the housing, making sure it is seated correctly.
- Replace the housing gasket if it was recommended by the manufacturer.
Step 5: Reinstall the thermostat housing
- Reinstall the thermostat housing and secure it with the bolts you removed earlier.
- Tighten the bolts to the specified torque (refer to your vehicle's service manual or user guide).
Step 6: Refill the engine coolant
- Replace the drain plug in the engine block and tighten it securely.
- Remove the radiator cap and slowly add the recommended amount of engine coolant.
- Use the funnel to avoid any spills.
Step 7: Check for leaks
- Start the engine and let it run for a few minutes until it reaches operating temperature.
- Check for leaks around the thermostat housing and radiator cap.
- If any leaks are found, tighten the bolts or fittings as needed.
Step 8: Test the thermostat
- Allow the engine to cool down completamentely.
- Start the vehicle and note if the temperature gauge reads within the normal operating range once it reaches operating temperature.
- This indicates that the thermostat is working correctly.
Note: Refer to your vehicle's service manual for any specific guidelines, torque specifications, or additional steps that may be required for your specific model and year of Chevy Silverado.
