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Jeep Cherokee and Grand Cherokee Overheating

abdgabdg Posts: 1
edited June 2015 in Jeep
I recently went to the mechanic to get my engine belt replaced. The next day I took it out to discover that the car has begun to overheat. I dont know what the issue could be. There is no coolant leaking either. Any thought as to what the problem could be and what I can do to fix it?

See Also
Engine Overheating? - 9 Steps To Solve (YouTube)


  • roofiemtlroofiemtl Posts: 2
    My 2002 Laredo I6 has just started to overheat. I purchased a new thermostat. Installed it and replaced the coolant. But I am not that lucky. I even changed the oil to full synthetic MOBIL 1 and added SYN. Slick 50. Nope, still gets there. The fan is working with air on or off. I see it spinning. At idle is where it starts to take a crap. driving no problem. Can it be maybe the fan isnt spinning fast enough.....
  • tuggajbtuggajb Posts: 646
    Replace fan clutch round thing with fins right behinde the fan blades blades both to it
  • roofiemtlroofiemtl Posts: 2
    It is a plastic electric fan. Do these have a fan clutch?
  • tuggajbtuggajb Posts: 646
    nope i was thinking you had tow package dont have fan hooked to water pump

    if over heating when stoped would think that elect fan not running right or up to speed if me would replace elect fan
  • dawn16dawn16 Posts: 4
    just bought this from a dealer , drove it home on fri and i cant' drive it. first the coolant fan keeps running, so replaced that and now works fine. still overheating so replaced the thermostat still overheating. did notice a light on the dashboard that looks like a camera to me ( for engine,emission,etc) also displayed is low coolant. filled the radiator completely.. it over heats with in a few minutes,even in idle. did notice when it is idling the overflow fills up to the top , when you shut the vehicle down it goes down as fast as it came up. any ideas.. I hoping nothing big i just got this and can't even drive it.
  • tuggajbtuggajb Posts: 646
    same as other reply bad head gasket

    dealer should be able to check if have exaust gases in colent sure sounds as if have bad head gasket

    have they checked raddiator flow so as to see if raddiator is pluged?
  • dawn16dawn16 Posts: 4
    yep jgc needs head gasket how much are they and the labor part?
  • tuggajbtuggajb Posts: 646
    don,t realy know as i do my own work
  • 5213252132 Posts: 62
    Did you replace the water pump yet? The lives of water pumps, on these engines, are short lived.
  • Ok bought the vehicle for 500 bucks cant beat it.vehicle was overheating. first the water pump was replaced due to the shaft being broken and the pulley kept throwing the belt off. next i replaced the thermostat was replaced. looked a little smaller then the one that was in there but it was the oem recommended. next the electric fan stopped working. It was shot so i replaced it and still didnt work then replaced the relay no luck and finally coolant temp sensor which the one they gave me did not match up to the connector and one from a 97 worked. fan still wont kick on and the vehicle constantly overheats still. Can someone please help me??
  • 30583058 Posts: 3
    i have a 2003 ,overheated. solution: change the fan motor. faulty fan motors due to faulty windings from factory.

    For anyone having overheating problems with their Jeep Grand Cherokees take these necessary steps before taking your vehicle to a dealership..........

    1. If your vehicle is equipped with a fan clutch, take your hand with the vehicle turned off of course and spin the fan by hand... you should feel resistance, if there is no resistance you will need to replace the fan clutch.

    2. If the fan clutch has resistance, turn the air conditioning on... look at the electric fan motors.. both should be spinning if they are not spinning there are two possibilities... there is a relay that is known to fry for the electric motors... verifiy it is working correctly... if it is then you need to replace the electric motor for the fan....

    **** another quick and easy way to check the clutch fan is while the engine is running find a focused flashlight of laser pointer and shine it onto the fan blades.. you should see a consistent circles of light if it is spinning properly... if your seeing the laser pointer or flash light hit on blade at a time than you can gurantee that it is the fan clutch.

    ******* Never take your vehicle to the DEALERSHIP until you have ruled out all simple causes************ The fact that the vehicle is not overheating when your on the highway tells me that the vehicle in fact does not have a HEAD GASKET issue... and the problem at hand is probably an external cooling device... the Fan cluctch or Electric Motor fan...
  • jeep is so evil. ever since i bought the damn's been giving me problems. so far i've replaced the barrings, water pump, starter, ignition switch, radiator, battery, fan clutch, 1 tail light (the whole assembly) (twice!!)...and now...worst of all i have to replace the rear diff!! i can't take it anymore LOL. i feel your pain. :P
  • i want to change the color of the speedometer question is, is it easy to change?? could a 24 old woman do it?? lol :blush:
  • Last week I was pulling a trailer with my 2001 Jeep Cherokee and the radiator gave up and developed a hole on the side. so I replaced the radiator. Now the Jeep will not cool its self down. I replaced the thermostat cause the upper radiator hose was not getting warm. so now it is warm and still wants to overheat and push all the fluid from the radiator to the overflow bottle. The motor refuses to cool down the upper hose is now getting warm. I need help asap please. I do not want to loose my job cause I can not get back and forth to work. the thermostat is a OEM 180 degree
  • tuggajbtuggajb Posts: 646
    what engine you have?
  • it is the 4.0L inline 6 automatic tranny
  • tuggajbtuggajb Posts: 646
    could have a bad fan clutch to check run engine till wharm sut off turn fan should have resistance .
    could also ruened the water pump as think i read that some of the water pumps had plastic impellers
  • Hello Sean If the coolant is going to the over flow tank that means there is more pressure in the cooling system then the radiator cap can hold back. First thing I would do is check the cap pressure rating then see if there is any resistance to the spring that feels to match the cap rating if not bad radiator cap. How long did you pull the load when the radiator was leaking? Did it warm up on you then cool back down. Coolant temp sensors don't measure air temp. If there was no coolant in your engine the gauge will read cool when acualy the engine will be turning itself in to a molten pile of steel. Sounds to me like your head gasket blew out, or wore you cracked a head. There is a easy way to tell. Go to any parts store and ask for a head gasket leak detector kit. (about 20 dollars) Just follow the instructions on the bottle. If the blue fluid turns yellow that is bad. It has never lied to me yet. Sorry for the bad news but I have seen that exact same problem on 4 or 5 4.0 I6 before.
  • smithedsmithed Posts: 444
    100 to 1 Kirksjohnson is right: you blew the head gasket when it overheated when the radiator blew out. Good luck.
  • iriahiriah Posts: 1
    There was a leak in the radiator of our 2001 Jeep Cherokee Sport, so my son replaced it. He also replaced the upper and lower rad hoses as "insurance." The upper one was clogged with rust. Now he needs to know the location of the bleeder screw to finish up. This is an in-line six, with Auto transmission.
    Many thanks
  • I hope someone here can give me some advice. I know NOTHING about car mechanics and I'm sick of car repairmen (and salesmen) cheating me.

    I bought a 2000 Jeep Cherokee Sport with 45k mile (yes, that's right) three days ago. Had them change the timing belt at the dealer before I took it. Have driven it 200 miles. Pulled in the driveway just now and fluid (I think it is coolant) pouring out from under the front.

    Of course, dealer now closed and I'm without a car until Monday or Tuesday.

    Any ideas would be helpful. I've read on other sites that the water pump should have been changed when they changed the timing belt. Would that cause all the fluids to pour out?

    HELP! :cry:
  • The best thing to do is call the dealer that installed the timing chain maybe they damaged the raditor when the were working on the front of the engine. Either way it sounds like a dealer screw up and they should take care of it for you.
  • ja4haja4ha Posts: 1
    Never overheated before replacing with new radiator (old was leaking) and new thermostat. I was told about air pockets so I install Prestone Reverse Flush Kit. Did not work. Changed the cap to higher pressure but it still filled the tank.

    Don't know what else to do besides the water pump. But either it works or don't...doesn't it? I don't want to remove the pump only to find nothing's wrong with it. Should I replace the pump or should I donate the truck.
  • daddy28daddy28 Posts: 7
    Not sure if you'll recieve this as it is an older post, but the only info i have for you is not much i'm in the same boat, my 2002 jeep GC laredo does the EXACTTT same thing, there was a recall on the radiator fan because they were basically chit, but once it blows out, your radiator fan relays blows out as well, this has happened to me the past 4 yrs all in june or july, and every year they replace the fan for free since it was an inital recall but it costs me 340 out of pocket for the relay that it blows out, alos i get the exact same message about coolant low and yadda yadda, i have no idea about that, i keep a full bottle of coolant in the jeep along with a jug of water at all times because honestly i have no idea when its going to happen so i take no chances, however if you do get this and have any other further knowledge on this problem let me know would ya, thanks.
  • gr3foxgr3fox Posts: 1
    :confuse: my jeep has started overheating about two weeks ago, the cooling fan is running, i have canged the thermostat and flush the cooling system, it only overheats when i sit for long periods,while im driving its fine.Whats wrong
  • Ok So far I still can't figure it out. I changed the relay behind the headlight to find out the one I bought is bad. So I put my old one back in (because the over heating problem is intermittent most of the time until recently)and of course the fan is spinning. But the temp is still going past 210. Tried the laser idea ,and If I point it at the fan it will hold a continuous dot form the laser in a still position(if that makes sense) so what else can I do or need to resolve the over heating problem?
  • tuggajbtuggajb Posts: 646
    if over heating is intermitant the fan could still be bad and not running up to speed could still turn but not fast enought to cool raddiator
  • daddy28daddy28 Posts: 7
    I wish i had more info for you, it took me 3 weeks just to get an appointment at the jeep dealership to have my radiator fan and relay replaced (for the 4th continuous yr in a row) and when i got there i told them to come up with a legit reason why this happens every year but then they told me they needed to keep the jeep for 3 days to do a 4 hr job because they were backed up so i just said screw it and left as the jeep is my only vehicle but i swear if i find out why jeeps are so [non-permissible content removed] and constantly have these over heating problems i will post the solution as soon as possible
  • Sounds like my jeep had a leak in the radiator,changed water pump,changed radiator, changed thermostat, and had radaitor cap checked. Bleed cooling system. Still ran hot. Removed thermostat still ran hot, The temp sensor was not completely bad, but it was reading off. My jeep was running 212. Changed senor runs 204 now. Also check and make sure your cooling system holds the correct pressure. If it was ran low on fluid it could of damaged your water pump.
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