Vehicle engine intermittent overheating. Water pump, fan or sensor problem.

Asked by Dec 23, 2013 at 12:25 PM about the 2004 Jeep Grand Cherokee Laredo 4WD

Question type: Maintenance & Repair

2004 Jeep Grand Cherokee Laredo 4x4. Engine 4L straight 6. Vehicle engine
intermittently overheats after 15 to 20 minutes at idle speed. Engine does NOT overheat
while driving vehicle and runs normal a little below 200 degrees (per dash gauge). Cooling
fan is electric and separate from water pump. Thermostat and radiator cap recently
replaced.

4 Answers

210,865

If it overheats at idle and not while driving, your not getting enough airflow. Could be the radiator could be clogged, your custom electric fan is not turning on, (temp sensor?) or air in the system, etc.. Worst case is a headgasket issue.

The major problem I had with my Jeep electric fan motor was the brushes were intermittent; tapped fan motor with a screwdriver handle (while off of course) and fan motors has been fine since, going on six months. Only other major problem was battery cables corrode internally next to battery. I cut back two inches of wire and replaced the battery connectors and have had good operation since. Seems a lot of problems are due to poor electrical conduction.

50

where is the temp sensor on my 04 v6 grand cherokeelaredo its not under the head light anybody know what other place tha radiator fan sensor can be

5 out of 5 people think this is helpful.
35

Check and make sure your engine fan comes on, you may have a short in wires to fan, clutch in fan may be blown, run hot wire to fan see if fan runs. Good luck.

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