over heating jeep

Needmyjeep · #1 05-11-2005, 01:37 PM

my jeep is over heating. The water evaporates rapidly. My husband has fixed the resivor canister, checked all the hoses, replaced the water pump and thermostat, replaced the radiator fluid and it is still over heating. What else can we try? My jeep runs well. It has over 169--- miles and we bought it from some ladies who ran it hard; its a 4x4 and they were not afraid to run it, but it appears they did not take care of it. Most of my friends and children think it's the ugliest vehicle, but it has gotten me out of many situations I know other vehicles couldn't. Your help is needed. Thanks.

fergmonster · #2 05-11-2005, 10:41 PM

Quote:

Originally Posted by Needmyjeep

my jeep is over heating. The water evaporates rapidly. My husband has fixed the resivor canister, checked all the hoses, replaced the water pump and thermostat, replaced the radiator fluid and it is still over heating. What else can we try? My jeep runs well. It has over 169--- miles and we bought it from some ladies who ran it hard; its a 4x4 and they were not afraid to run it, but it appears they did not take care of it. Most of my friends and children think it's the ugliest vehicle, but it has gotten me out of many situations I know other vehicles couldn't. Your help is needed. Thanks.

year? tranny? etc..... earlier models had a poor cooling system!
mine ran warm til i changed to a different thermostat housing....
what do you mean "fixed the res. canister"?
exactly how hot/warm is it running?

Needmyjeep · #3 05-12-2005, 11:02 AM

Quote:

Originally Posted by fergmonster

year? tranny? etc..... earlier models had a poor cooling system!
mine ran warm til i changed to a different thermostat housing....
what do you mean "fixed the res. canister"?
exactly how hot/warm is it running?

My jeep is an 1989 Cherokee Laredo 4x4 6cyl.
Well, since yesterday he replaced the res canister, replaced the upper rad hose and radiator, and he took the thermostat completely out; he also cleared the air pockets in the hoses. The jeep, prior to my husband changing what I feel is everything out, it was in the HOT Zone. It normally runs no higher than 210. I drove it this morning, it did not overheat, but now the idle is low at about 0-5< rpms and the transmission fluid is leaking. I thought it would stall. I just turned around and came back home. So what do you think is happening now?

rksnc · #4 05-12-2005, 01:21 PM

Well first let me say, taking the thermostat out is not a good idea for alot of reason. First being without the T-stat water will flow though the radiator to fast. The T-stat slow the water down so it will stay in radiator long enough to be cool off.
But I think I would think of things like the fan clucth and maybe radiator is half clod up. May have to replace the radiator. Also makes sure that the fan shroud is still on.

myjeepsux420 · #5 05-12-2005, 06:59 PM

I bet it's the headgasket. You do need to put that thermostat back in, a vehicle will actually over heat without it. The coolant will not have enough time to cool if it continues to flow in and out of the engine.

4x4grey88 · #6 05-14-2005, 10:04 PM

I have a 1988 4.0L 4x4 and I had troubles with overheating too. The thing I did to repair the problem was: change out the thermostat, water pump, temp probe, and the last thing I did was change out the radiaror itsself. I replaced it with a three pass radiator instead of the OEM. I found that the 1992 worked very well for my application. It did not take all that must to replace it either. I had to replace the resovour (water bucket) and modified the heater core lines (you can purchase a new heater valve assembly) by cutting off one of the extra ends and replacing the hose and clamps. My Jeep now only gets up to about 170*. The new radiator costed about $135.00 delivered to the door. The one I installed was an 'open' type radiator.

My Jeep is recently having idle problems. It use to rev high upon start up and then idle down; now it starts and then dies out. Only after a couple times of starting will it stay running. I changed out the TPI and going to change out the sensor on the flywheel.

4x4grey88 · #7 05-14-2005, 10:08 PM

P.S. I also 'burped' the cooling system by loosening the temp probe and letting out some of the coolant. I read that the engine coolant system sometimes gets "air bound" on the 'closed systems' (1988 era).

4x4grey88 · #8 05-14-2005, 10:10 PM

P.S. P.S. PUT THE THERMOSTAT BACK IN...!!!!!

When you remove it it tell the computer "brain" that the engine is up to temp when it is not. Messes up the computer.

Asulli83 · #9 08-22-2006, 12:11 PM

I have a 1989 Jeep 4.0 4x4. I was havning a problem with No start / Hard Start, It was starting and then shuting off, sometimes worked and other times not. My uncle owns a garage and we fixed everything electrical on it,.... Still nothing, I went on these message boards and I found great help! Thank u!

The problem was the <CAS> Crank angle Sensor! $37.00 part now starts and stays started!
~
Yesterday I took it to get something to eat on break and it overheated BAD the coolant boiled out of the Overflow and was pooring out... The only thing I did prior to that was check to see if the AC / vent worked... Would that cause that to over heat>??? Well now I'm checking the t-stat to see if thats it... Any Ideas what I should do>???

fredjacksonsan · #10 08-22-2006, 12:19 PM

Asulli83, welcome to AF. Please note the date on a thread before posting in it; this thread was dead for over a year.

You will be better off to start a new thread concerning your overheating issues. I'll close this one so you can start fresh. Be sure to include a bit more description of how you were driving before the overheat...city traffic, time, speed, etc.

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