How do you replace the thermostat on a 2003 Jeep Cherokee?

Answer 1

I don't have specific knowledge of the Grand Cherokee, but heres how I would do it.

The thermostat restricts the flow of coolant circulating to the radiator whilst the motor is still warming up. It is located in the waterline between the cylinder head and the radiator.

Here is where I break into this answer (giant167).

On the 4.7L v-8, the thermostat is located on the bottom left of the engine block. You must drain the radiator and remove the bottom hose to access the thermostat housing.

Mr. Wheeldon continues now.

You might want to loosen the bottom radiator hose clip to drain out and save about 4 pints of the coolant before you start. Look at the top of the radiator and find a large diameter rubber hose headed towards the motor. It should terminate at a dome-shaped housing at one end of the top of the motor. There will be three or more bolts securing the housing. Remove the housing being careful not to damage the paper gasket that seals the housing and hook out the old thermostat. Replace it with one of the same type and temperature rating, making sure it is the same way up. Either replace the gasket or use some gasket past to seal the joint when you replace the housing. Don't over-tighten the bolts. Make sure all the hose clips are secure, then replace the coolant and top it up to the correct level.