Available for more than 30 years, the Grand Cherokee is a popular model offered by Jeep. Whatever engine type or year you might have, changing the thermostat in a Grand Cherokee remains the same. If you have overheating issues with your Jeep, here's how to change the thermostat.
Open draincock on the radiator to drain the coolant from your Jeep Grand Cherokee. This draincock is located on the lower right side facing the rear of your Cherokee. Use a sealable container and reuse the coolant if it is relatively new and clean.
Follow the upper radiator hose to the point where it meets the thermostat housing. The thermosat is located inside the housing. Use a clamp tool or vise-grip pliers to loosen the clamp holding the hose to the housing. Work the end of the radiator hose free of the thermostat housing.
Remove two bolts holding on the thermostat housing cover. Pull off the cover. Take note of the position of the old thermostat. Remove and install the new thermostat in exactly the same position.
Scrape off residue of the old thermostat gasket from the inside of the thermostat housing cover using a razor blade. Avoid getting any debris inside the thermostat housing.
Install the new gasket. Reattach the thermostat housing cover and radiator hose. Start your Jeep Cherokee and run the heater on high. Allow the engine to warm up. Check for leaks.
