Question about 2002 Jeep Liberty

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Jeep Liberty Boils Over Into Resevior

My jeep liberty boils over. At idle it will not overheat or boil, but when revved up it will boil after about 30 seconds. The boil over will not be as quick or severe when the heater is on, but it does eventually boil even with the heater on. I have replaced the thermostat, water pump, have it full of coolant, have attempted to remove all of the air, but how does one know that all the air is out? I have not checked the pressure with a compressor for cracks/leaks. So perhaps that is the next move. I am concerned that the radiator does not flow as well as it should and that may be a factor. I flushed it and it is not clogged, but maybe does not flow as well as it should. I think the main thing to consider is that at idle it all works fine. The jeep can idle for an hour and not over heat/boil. When revved up it will boil into the plastic tank through the overflow line coming off the top of the radiator. No water in oil, no smoke, just seems to boil very quickly. Thanks for reading, any help is appreciated. If you have any questions I will answer them asap. Would love to get this maddness over quickly.

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: 1999 jeep gran cherokee is pushing water into

do you have a hose that is collasping on you, please check them.

Posted on Feb 17, 2011

alejandro566
  • 1 Answer

SOURCE: My 3.7 liter 6 V Jeep Liberty (2003) runs hot very

Chek in this order:

1- The water level in the auxiliary deposit.
2- the ventilator, some one have in the center a viscosity licuit that become hard when the temperature increase, if not, the air flow slowly and the water increase the temperature.
3- the valve, this is locate in the return tube from the radiator to the motor, this one regulate the pass of water to maintain the temperature stable.

I hope this help you.

Posted on Nov 03, 2011

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2 Answers

Overheating coolant boiling out into reserve tank


you have a blown head gasket.. doesn't have to have coolant in the oil for a blown head gasket... if hoses are rock hard when running then you have exhaust leaking into the coolant via a blown head gasket...

Jul 14, 2012 | 1998 Plymouth Breeze

2 Answers

I keep geting a low coolant indicator when it first starts in the morningalso it keeps overflowing and boiling our of the overflow tank. This happens even when ythe coolant level is below full.


Either the thermostat is stuck in the closed position...or the engine cooling system cannot pressurize...both will cause an overheat condition.
A blown head gasket can cause overheat condition as well as fluid loss (boil over)

I'd maybe remove the thermostat and either just replace it or not have a thermostat installed just to see if it still boils over. If it boils over with no thermostat installed then you're getting into possible leak in cooling system...i.e. water pump weep hole, hose or radiator leak...or a blown head gasket.

Hope this helps...

Aug 28, 2011 | 1995 Jeep Grand Cherokee

1 Answer

My 2005 jeep liberty overheats at an idle but not all the time the front did get packed with snow in the lower part of the grill but i looked for leaks and damage but found none


If it overheats at idle only, then there is a problem with the fan. Check out this article, to know for sure. There are some good instructions to follow. They will tell why your truck overheats.

Dec 22, 2010 | 2005 Jeep Liberty

1 Answer

Jeep Liberty 2005 3.7 engine running hot, need to install thermostat? fan working, full of water , water tank cap fits good.


A new thermostat would be the easiest and cheapest to do first.There is also the water pump but that normally would cause a complete overheat,probably after about 20-30 miles,water boiling out the overflow.Good luck! Greg

Sep 05, 2010 | 2005 Jeep Liberty

1 Answer

Runs hot 205-210 I live in the desert. It boils over sometimes.


Should not overheat at 210 I don't live in the desert and mine runs at that temp all the time! You need to run a 50/50 antifreeze water mix (verify with a tester) It may also help to use distilled water. Mineral content can lower boil point a bit.That should raise the boil point up to about 225. Also make sure the cap is the correct pressure rating (think it's 18psi) and that it is sealing properly.

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1 Answer

Car overheated and antifreze was boiling and spewing over until engine cooled. 2004 jeep liberty 2wd. Thanks!


Need to know what caused the overheating, possible broken serpentine belt, thermostat, water pump, radiator, fan clutch, cooling fan motor. After motor has cooled down fill radiator with water till full, look make sure serpentine belt not broke, start engine run about 5 minutes, turn off, let sit 3 minutes, start engine look at temperture gauge is it over half way of gauge, Do you have a fan blade driven by water pump or electric fans?

Feb 10, 2010 | 2004 Jeep Liberty

1 Answer

02 Jeep Liberty check engine light and trans. revving


SCANN-TOOL THE CODE ,IT WILL COME UP WITH A TRANS CONTROL UNIT.

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