Question about 2001 Jeep Cherokee

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Car runs hot while idling, then cools down when you start driving. Have to add antifreeze but cant tell where it is leaking. could it be a heater valve busted or is it possibly the water pump?

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It`s easy to see if the water pump is working just drain some of the fluid out of the radiator and look inside while vehicle is running NOTE due this only when vehicle is cold.
Know if it`s not flowing after it starts to warm up then either the thermostat is stuck closed or the water pump is bad i would start with the thermostat if i where you the other job is a lot harder and more expensive
Also the fluid disappearance could be caused by the fluid boiling out when it gets hot one last note check pressure cap on radiator for wear or cracks if bad replace hope this helped you.

Posted on Sep 10, 2009

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If there is no visible leak (dripping or puddle under car after parking), check the engine oil. If it's milky white, your coolant is leaking into the oil (head gasket is bad). When the car runs hot when idling, is the cooling fan kicking on? If not, the switch that is supposed to signal the fan to turn on at a certain temp is defective, or possibly the fan motor is bad. Check the water pump for signs of leakage. There is a weep hole at the center under the pulley that spins the pump. Use a small mirror to look for evidence of a leak there. If you find it, replace the pump, as the leak will get worse, and is a sign of the bearings going bad.

Posted on Sep 10, 2009


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If i just put water and no coolant could this make my car over heat

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Can i drive my 2010 jeep liberty with a leaking heater core?

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Why does heater blow cool air?

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Heater blows cold air when the truck is idling or in stop and go traffice

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My heat In my car is not working unless u are driving then heat will blow out hot but when the car is not in motion the air turns cold. I already replace the water pump,and thermostat

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2004 cheverolet impala 3.4L engine - Started running hot. Had never changed antifreeze, bought a flush and refilled with antifreeze. Ok for several weeks, started running hot again. Replaced the...

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I have a 98 cavalier. it runs hot after engine is runnung for a while. the fan comes on and helps it a bit but not enough. and the air from the heater inside never gets warm , where do i start? thx

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