Why does my Jeep Run Hot?

95

Asked by Aug 28, 2009 at 10:43 AM about the 2000 Jeep Grand Cherokee

Question type: Maintenance & Repair

I have a 2000 Jeep Grand Cherokee 4.7 V8 with 108000 miles. Some times while in traffic, or a drive through or long stop light the temperature will rise to around 230 instead of the 210 in the middle. The temp will rise even faster with the AC on. However, when I'm moving, the temp. stayes around 210. Any ideas as to whats going on?

6 Answers

135

First start with the easiest and simplest things to check, thats always number one when troubleshooting your rig. I would look at all your belts, if you have a loose belt that simply isnt turning the fan at idle, the wind may be moving the fan when you drive. Next check your fan itself, turn your car on, leave it in park and pop your hood, look to see if your fan is spinning, if its not spinning at idle then you have a problem with a temperature sensor that tells the fan to come on. Your thermostat could also possibly be the problem, it could just be sticking closed. I would start by checking these things, they are all real easy to check and you can do yourself, dont waste your money yet just in case it turns out to be a loose belt :)

13 of 13 people found this helpful.
1,405

i had the same problem, your cooling fan is not running when it should. try changing your temperature switch right by your thermostat. i dont know its name but talk to your local parts dealer theyll know what your talking about. it will cost you about $15-20

10 of 10 people found this helpful.
95

Some of those Engines just run a little hot at times and it could be normal. But, definitely check the condition of the fan and electric motor. Just because the fan is turning, doesn't mean it's turning fast enough. You are likely going to have to replace the electric fan motor soon if it keeps up after the weather cools off. They tend to wear out on that year/model. It's not too difficult if you have the tools and patience.

6 of 6 people found this helpful.
10

flush the eng after you you get all of the Old water out. Then take off the fan an then then remove the old wether pump and and put a new water pump on once you get the old weather pump on a tighten down. then Look at all of the heater hoses if any of them are Bad Chang them starting with the heater hoses and then look a the rest of them. If any of them Feel spongiform put put new on, we you do that Shang the thermostat and put put in a fail safe this way if it still over heat the thermostat ?A lot of times the impale come loos and you will not every notice till there is pressure is on IT. Then a father all of what you did you are ready to put in new Annti freeze to be put in and it has to brd half and half and then check the radiator and mad sure it's the right one and your JEEP should stop running HOT. Ed from Jersey I hope it helps

1 of 1 people found this helpful.
20

I have a 2001 Jeep Grand Cherokee Limited 4.0 inline 6 with 125K miles. I replaced the timing chain, IAC,TPS, Cam position sensor, crank position senor, and park position sensor. I can't figure out why it still idles high on start. I've checked all the vacuum lines. Anyone have any ideas?

2 of 2 people found this helpful.

long story short,i went through everything,believe me.The problem is the cooling system trapping air due to system leaks.I did not have any visible leaks,until i started testing for a blown head gasket,and i found very minor leaks everywhere i looked.After solving all of them the fan runs perfect,without changing the fan or any part of it.I am not a mechanic but i went deep on this one.even the factory pressed fittings on the heater lines weep.A pin hole in the radiator i stumbled on.The clamps on the main radiator hoses need to be changed.The list goes on,new water pump.I believe i still have a minor leak yet to find,but for the first time since i have owned the jeep it maintains 199-203 with force.I added booster fans that now cause it to run a couple of degrees hotter,because the thermostat is on the cold side.(what the frik)I did not change the radiator,i plugged the pin hole and the difference is unbeileivable,nor can i explain it.

Your Answer

Grand Cherokee

Looking for a Used Grand Cherokee in your area?

CarGurus has 70,648 nationwide Grand Cherokee listings starting at $1,045.

ZIP:

Jeep Grand Cherokee Experts

  • #1
    inuevafreak
    Reputation
    2,120
  • #2
    Tom Demyan
    Reputation
    1,910
  • #3
    thejeepdoctor
    Reputation
    1,830
View All

Related Models For Sale

Used Jeep Cherokee
363 Great Deals out of 47,069 listings starting at $2,795
Used Jeep Wrangler
314 Great Deals out of 16,231 listings starting at $2,500
Used Ford Explorer
853 Great Deals out of 63,388 listings starting at $995
Used Dodge Durango
306 Great Deals out of 21,420 listings starting at $2,195
Used Toyota 4Runner
299 Great Deals out of 21,852 listings starting at $1,700
Used Chevrolet Tahoe
651 Great Deals out of 39,510 listings starting at $1,000
Used Ford F-150
2,315 Great Deals out of 183,061 listings starting at $1,000
Used Chevrolet Silverado 1500
2,124 Great Deals out of 167,339 listings starting at $1,995
Used BMW X5
443 Great Deals out of 12,266 listings starting at $2,000
Used Chevrolet Camaro
414 Great Deals out of 30,788 listings starting at $3,550
Used Ford Mustang
724 Great Deals out of 38,316 listings starting at $895

Used Cars For Sale

2018 Jeep Grand Cherokee For Sale
21,784 listings starting at $27,190
2017 Jeep Grand Cherokee For Sale
91 Great Deals out of 21,277 listings starting at $21,999
2016 Jeep Grand Cherokee For Sale
21 Great Deals out of 2,360 listings starting at $19,700
2015 Jeep Grand Cherokee For Sale
183 Great Deals out of 5,333 listings starting at $17,295
2014 Jeep Grand Cherokee For Sale
176 Great Deals out of 6,181 listings starting at $13,688

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.