Question about 2001 Jeep Grand Cherokee
You may have a stuck closed thermostat or the impeller has failed on the water pump.
Replace them both. You never trust a stat that has gotten hot, and there is no sure fire way to test. You can take it out, put the car back together and see if the engine still gets hot to determine if it's the stat, or the water pump, but once you do all that, you might as well just replace them both.
You also need to make sure the radiator is not all slugged as well, and make sure the radiator cooling fans are both working.
There is a cooling fan relay that is prone to failure as well. Mine did in my '03 Jeep Cherokee. It's located behind the right headlight, and requires that you remove the headlight, drill a hole in the plastic shield, and replacing the relay. You can get a new one at the auto parts store. For more detailed instructions, go to www.wjjeeps.com
Posted on Jan 29, 2009
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Posted on Jan 02, 2017
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