Question about 1990 Jeep Cherokee Limited

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1990 jeep cherokee pioneer

I have a 1990 jeep cherokee pioneer that overheats whenever i'm stopped or go over 60 MPH. I already changed the T-stat and the water pump and it still overheating. Any idea why? Thanks

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Radiator or coolant temperature sensor maybe bad clutch fan

Posted on Feb 24, 2013

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Radiator may be plugged up inside or a bad headgasket. Try the radiator first since it is far easier.

Posted on May 29, 2008

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Temp. guage indicates overheat 10 mins. from startup


Hi Reggie, I'm glad to help. TWO things I want you to check. ONE: You have changed out a lot of stuff, so you may have air trapped in the cooling system, you'll need to remove the radiator cap and let it run until your at operating temperture, while watching to make sure it doesn't overheat on your of-course. If after running the engine say 30 minutes and topping off the coolant if needed, it still runs hot. Move on to: TWO: If you have the electric fan, some do, some don't. If it is electric make sure the fan is coming on, if it doesn't come on then you have found your problem, replace the fan assembly. Hope this helps and have an awesome day Reggie!

Jan 09, 2014 | 1996 Jeep Grand Cherokee

1 Answer

95 jeep grand V8 overheats cold upper radiator hose and cold heater


clogged radiator or bad water pump or both
google grand cherokee forums and join one or more and post this and future ques there

Feb 03, 2013 | 1995 Jeep Grand Cherokee

1 Answer

I just changed the alternator, the water pump, the thermostat and the serpentine belt in my 1990 Jeep cherokee, 4.0L in-line 6 cyl. However, my truck is still overheating, WHY?


Hello,
After all said and done,its a bit pertubbing that your car is still overheating.
However,there is still a particular component which if you don't replace,all the other components you replaced won't be of great importance.
I'll suggest you replace the rubber gasket which lies in between the engine compartment and the radiator, When this component is weak,the water mixes with the oil in the engine compartment,hence the oil looses its viscousity easily thereby it looses its ability to absorb heat which makes the engine to overheat automatically.

Thank you for using fixya.

Jul 10, 2011 | 1990 Jeep Cherokee Limited

1 Answer

Engine Cooling problem 2000 Jeep Cherokee 4 cyl


Although the 4 cylinder is too underpowered to have air conditioning in my opinion, it still shouldn't overheat within 10 minutes unless something is wrong. If your Jeep doesn' not overheat when you are driving WITHOUT AC on then your compressor might have a problem and causing the engine to work too hard to turn it.

But if it overheats without the AC on, then the first thing you need to do is check the cooling fan and see if it operates! There has been a lot of problems with the cooling fan relay on this model. If that isn't it, then move to changing the thermostat and checking the water pump.

Jul 03, 2011 | 2000 Jeep Cherokee

1 Answer

2000 jeep grand cherokee, when idling keeps overheating have replaced radiator, water pump, radiator hose ,cap & thremostat, and relay. as long as Im driving the temp stays at 210, please offer...


Since you have already changed everything that you have, I can not think of anything new that might cause your Jeep to overheat. Are you going by the meter in your vehicle or doing separate temperature measurements? I had a defective temperature gauge that caused me to chase my tail till I did separate measurements.

Jun 16, 2011 | 2000 Jeep Grand Cherokee

1 Answer

My 2000 jeep grand cherokee laredo started to overheat so i changed the thermostat and now the tempature gauge reads below 150 when driving over 40 mph, but on the street its fine. what could be the...


Sounds like you installed either a bad t-stat or something foreign like a piece of gasket or some gasket sealer is stuck in the t-stat itself, causing the t-stat to stick open

Jan 05, 2011 | 1996 Jeep Grand Cherokee

1 Answer

I have a 2004 Jeep Grand Cherokee with a V8. I


Water pump would never do that. pump either works or doesn't. You should have no heat 'till the engine is warmed up. Engine heats the water. If it was doing this before you changed the thermostat then the old one may have been bad. However, at this point, Id be looking to see if you have it installed with the spring end towards the engine, if the electric fans are coming on and if the radiator is internally obstructed and not flowing properly. You need to re-fill the system with the heat on full hot and the fill cap off to ensure that air purges from the system. If equipped with air bleeds, use them as well. One trick I use to prevent air binding is to warm up the engine to the point that the temperature is just below where it normally runs at. Turn the engine off and wait about three minutes for the stat to open and then begin filling slowly till it's full.(running) Used to be you could check radiator flow by putting your hand on it in different spots when hot. Cold spots would be where flow is restricted. Today radiators are not easily reached but most good shops use a heat sensing gun to check this. If your radiator fills through a cap on the radiator if you need to dribble coolant in or it backs up, that is a good indication that the radiator is obstructed as well (providing t stat is working.)

Dec 07, 2009 | 2004 Jeep Grand Cherokee

2 Answers

I had a new water pump installed on my 2005 jeep grand cherokee laredo as it was leaking. After the installation, the temperature gage is still running hot. Could it be the thermostat?


Thought I answered this one already. but here's the short version. Yes , change the t stat after servicing wp. They become unreliable after any high temps (above normal). Check the electric fan, and the mechanical fan to make sure both are working properly. If all else fails. remove radiator and back flush. often overheat or high temps can loosen block rust and obstruct part of the radiator core.
When re-filling, turn heater on high to eliminate air pockets in system.
Good luck with it
If you need more info, just ask!

Apr 05, 2009 | 2005 Jeep Grand Cherokee

1 Answer

89 jeep pick up


what you have too do is heat the truck up and as the truck is warm take the small hose off the head and take the cap off the water bottle on the side wram engine!!! not hott!!! let the water and antifreeze come out of the small hole it needs too be bleed from the replace hose back and it should be fine warm moter not hott!!

Oct 16, 2008 | 1990 Jeep Cherokee Limited

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