Question about 2001 Jeep Grand Cherokee

1 Answer

Jeep is running hot - 2001 Jeep Grand Cherokee

Posted by on


1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Expert
  • 158 Answers

The first thing, of course is to check your coolant level, and if coolant is required, to add it in the proper proportion with water that is recommended for your climate. Now remember, if you need to add a good bit of coolant, you probably have some sort of leak, and will need to determine where that is and stop it

If it overheats only when sitting it is likely to be an electric cooling fan motor or the thermo switch that turns the fan on and off that is not functioning. Sometimes the fix for this can be as simple as checking to see that the wires are properly connected for both.
If they are, then stand next to the car when you start it up and, after the car has warmed up, listen to see if the fan comes on. After awhile it should cycle on and off to help cool the car. Enough air passes through the radiator when you are on the highway that the fan is not needed, and so the car will not overheat then even if the fan or thermo switch is bad.
if it overheats all of the time, and your coolant is both full and the proper mixture, then you can look to a few other causes: a clogged radiator, a bad water pump, a bad thermostat, or in the worst of all worlds a blown head gasket or the like

let us take the waterpump first. It is a relatively simple propeller like device inside a housing and as it is turned by the belt if pumps the coolant. When it fails, typically what happens is the seal on the pump fails and coolant begins to escape past the bearings on the pump and out a drain hole built into most pump housings and you will see evidence of the failure in coolant pouring out below the pump area.

If that is not the case, let us look next to the thermostat. For the most part thermostats when they fail, fail in the open position--that is, they allow the coolant to circulate freely between the engine and the radiator without a mind toward whether the engine is operating at precisely the optimum temperature or not. So in most overheating situations, the only way a thermostat failure can be the culprit is if it failed in a partly or entirely closed position--thereby limiting or stopping the flow of coolant entirely. If it failed closed the car would overheat in just minutes. Partly open failures, not common but possible, would impede the flow and limit cooling capacity. You might see evidence of it on very warm days only, or climbing hills, or pulling trailers--that sort of thing. An easy way to determine if the thermostat is working properly is this: When you first start the car in the morning, sit for several minutes and watch the temperature guage carefully. It should slowly rise as the temperature in the coolant in the engine increases. Then at some point it should suddenly drop back a bit signalling that the coolant in the engine has reached operating temperature and the thermostat has opened to exchange the coolant with the cooler fluid still in the radiator. If is does, the thermostat is still functioning.

Now, assuming that the thermostat is working and the waterpump is working we need to look at the radiator. If you do not change your coolant often, the inside of the radiator can become coated with sludge from corrosion (the coolant has a corrosion inhibitor in it that goes bad with age). That sludge can serve as an insulator to limit the radiator's capacity to exchange heat. If that is the case here, you will need to use a radiator flush to dissolve the goop and then refill with the proper mix of coolant and water suitable to your climate area.

Have a nice day..

Posted on Aug 03, 2010


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

2006 jeep liberty run hot ,but when i turn the A/C on it wan,t run hot

runs hot, so how much, use a meter?
full flush the coolant system yet.
test the Radiator tube for clogging, using any cheap, IR pyro temp gun? made, (ask how)
clean the leaves, and bugs out to all cores in front of car.
A/C condenser and RAD yet?
are fans working at RAD?

Oct 03, 2014 | 2006 Jeep Liberty

1 Answer

Motor running hot on 06 jeep commander

How hot and when does it happen, idle, running at speed?? When?

Aug 31, 2013 | 2006 Jeep Commander

1 Answer

1987 jeep cherokee 4.0 straight six. runs hot. replaced thermostat still runs hot. what other things may cause this so that im not taken advantage of?

you dont say how hot it runs, could be head gasket problems, or you my just have an air lock in the cooling system

Jan 25, 2011 | 1987 Jeep Cherokee

1 Answer

My 2004 Jeep Cheokee loredo is running hot. Could

Could be several things,

1. thermostat
2. water pump
3. fan motor is bad (is the fan running when at temp?)
4. fan motor relay

Is it running hot all the time or just when setting idle?

May 16, 2010 | 2004 Jeep Grand Cherokee

1 Answer

My 2002 jeep liberty is running hot i have changed the thermostat and the water pump is working and the jeep is still running hot while driving. vehicle does not run hot while in park and running.

your clutch on cooling fan could be faulty or your radiators cores is blocked and restricted.also grilled could be blocked restricting air flow.

Dec 25, 2009 | 2002 Jeep Liberty

1 Answer

The blinkers and wipers and radio dont work unless the key is turned backwards, if the jeep is running none of these work, this is a 1999 jeep wrangler tj

sounds like the accessory side of the ignition switch is not working. When the key is on run position the same wire that is hot coming out when the key is turned to accessory should be hot, along with the ignition wire that runs the engine. (hot meaning it has 12v)

Oct 21, 2009 | 1999 Jeep Wrangler

1 Answer

Overheating jeep cherokee 1991

sounds like you have a airlock or air in the system. i had the same problem. there is two hoses that run along the value cover. undo the top one and plug it with a screw driver or something. then the other hose the one that runs to your water pump you need to install a T on it that you can attach a garden hose too. turn the hose on full blast. the water should come shooting on the engine where you disconnecting the hose. let the hose run for about 15mins or so. i jumped on the bumber a bit to shake the jeep. just to make sure all the air comes out. the point of this is that this is the highest point on the engine. so the water should force any air out. jeeps are bad for this any air in the system really messes things up. the transmission thing has nothing to do with this. good luck

May 17, 2009 | 1991 Jeep Cherokee Limited

1 Answer

Engine runs hot.

has the water pump been replaced at one time?

May 03, 2009 | 1993 Jeep Grand Cherokee

Not finding what you are looking for?
2001 Jeep Grand Cherokee Logo

529 people viewed this question

Ask a Question

Usually answered in minutes!

Top Jeep Experts


Level 3 Expert

81400 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22359 Answers

Kevin Daniels

Level 3 Expert

1455 Answers

Are you a Jeep Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides