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