Question about Jeep Cherokee
Also - be sure the radiator fans are working properly.
If the system has air in it (from the pump replacement) you will experience overheating.
To purge the air:
Operate the engine with the heater control valve in the HEAT position until the thermostat opens to purge air from the system. Check coolant level and fill as required.
Some 4.0s use a serpentine drive belt and have a reverse rotating water pump coupled with a viscous fan drive assembly. The components are identified by the words REVERSE stamped on the cover of the viscous drive and on the inner side of the fan. The word REV is also cast into the body of the water pump.
Make sure you have the correct pump!! (there are 2 pumps - however you have one or the other - not BOTH).
There is only 1 water pump on the vehicle.
Lastly - overheating can be caused by a lack of pressure due to a leak or air entering the system. Pressure check the radiator, cap, and check the overflow container hose to verify there is no leak/crack.
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Posted on Jul 28, 2009
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Posted on Jan 02, 2017
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