88 Cherokee still kind of overheating???
::CF Moderator::
Joined: Aug 2011
Posts: 43,971
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From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Old School CF Moderator
Joined: May 2010
Posts: 9,652
Likes: 3
From: Chattanooga
Year: 2001
Model: Cherokee
Engine: 4.0
I am still in a depressed/border line alcoholic state from selling my 88... still hard to think about it. But I love my 98 
-Just kidding about the alcoholic part... haha
-Just kidding about the alcoholic part... haha
Thread Starter
Junior Member
Joined: Jul 2012
Posts: 83
Likes: 0
From: Denver
Year: 1988
Model: Cherokee
Engine: 4.0 Litre
I was thinking that, but I was thinking that if the radiator had a flow issue, it would really overheat during city driving like stop and go traffic. But I swear, I could have the air conditioner on and sitting in 100 degree weather and the thing will not go past 210. Its baffling to me, and right when I get off the highway if it starts overheating it will cool back down. But if this pressure bottle doesn't work, it looks like I will be replacing the radiator, it is the only part of the cooling system that I have not replaced, aside from heater core.
::CF Moderator::
Joined: Aug 2011
Posts: 43,971
Likes: 1,579
From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
I was thinking that, but I was thinking that if the radiator had a flow issue, it would really overheat during city driving like stop and go traffic. But I swear, I could have the air conditioner on and sitting in 100 degree weather and the thing will not go past 210. Its baffling to me, and right when I get off the highway if it starts overheating it will cool back down. But if this pressure bottle doesn't work, it looks like I will be replacing the radiator, it is the only part of the cooling system that I have not replaced, aside from heater core.
Thread Starter
Junior Member
Joined: Jul 2012
Posts: 83
Likes: 0
From: Denver
Year: 1988
Model: Cherokee
Engine: 4.0 Litre
Lol I love my '88 except for the cooling issue. It really does awesome wheeling for being stock, just a matter of getting it to the trails, lol. Its a fun car, I am glad I bought it.
Old School CF Moderator
Joined: May 2010
Posts: 9,652
Likes: 3
From: Chattanooga
Year: 2001
Model: Cherokee
Engine: 4.0
I bought my 88 right after high school. First came a roof rack and some lights, then a Rustys 3 inch kit, then a tires, then a 4.5 inch RC lift, then a dana 44, and some other goodies..then sold it 
...got too good of a deal on the 98. My 88 is the first build thread in my signature if you wanna check it out. May give you some ideas..
...got too good of a deal on the 98. My 88 is the first build thread in my signature if you wanna check it out. May give you some ideas..
::CF Moderator::
Joined: Aug 2011
Posts: 43,971
Likes: 1,579
From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
You need to address the ground issues and the C101 connector issue before you get left stranded somewhere. Super easy to do and cheap!!
Thread Starter
Junior Member
Joined: Jul 2012
Posts: 83
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From: Denver
Year: 1988
Model: Cherokee
Engine: 4.0 Litre
That's awesome, a lot of hard work, something to look forward to. Thanks for your guys' help, I will let you know how everything goes, we are going to the mountains this weekend again.
And cruiser, yes, I need to get that done, I saw your links, thanks for the help!
And cruiser, yes, I need to get that done, I saw your links, thanks for the help!
CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
Ok really stupid question. So I have an 88 jeep cherokee pioneer, I have had some heating issues ever since I bought it. I have had the thermostat, temperature sending unit, water pump, fan clutch, electrical fan relay and pressure bottle cap replaced plus a couple of flushes, car has a little of 76k on it. In normal driving the car never overheats.I live right by the mountains, and I started to notice while driving I-70 up in the mountains that the car starting to get really hot once again. I had the car downshifted into 4th gear to make it up a pretty steep hill at a reasonable pace around 55-60 mph for about 10 miles and the temp got close to around 245, its whatever mark is before the red, and then I hit some downhills and the car cooled. Outside temp was around 90 degrees. Before I replaced everything it would just go into the red automatically. I know cars get hot going up hills, thats normal, but this seems too hot, I just want to know if this is normal for this jeep, if anyone else gets that hot in a similiar situation. Only thing that has not been replaced in the cooling system is the radiator and heater core. I just don't know if this is normal, I mean I have another car that got a little past the midpoint in the same area but not as hot as the jeep. I am just so tired of running into cooling issues with this car, i feel like if I had gone anothe few miles uphill, it would have gone into the red.
Thread Starter
Junior Member
Joined: Jul 2012
Posts: 83
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From: Denver
Year: 1988
Model: Cherokee
Engine: 4.0 Litre
Right after I bought the car. I felt pretty stupid, when I test drove it before I bought it I drove it around the city it ran fine, drove on the highway and it was fine. Everything was replaced about 3 months ago. I replaced thermostat and waterpump first, and when that wouldn't fix the issue I replaced fan clutch, the hose coming from the water pump, the hose going into the thermostat housing, and two flushes. The flushes were done @ Midas. After I get about 20 miles down the highway, or going up an incline at a decent rate of speed is the only time it overheats. Only time, like I said I drove it around the city stop and go traffic the other day, it was around 100 degrees out and I had the air conditioning on and the thing will not get hotter than 210. Its weird...
CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
alot of people will say a fan clutch does nothing for cooling at highway speed i was a beliver also until mine was doing same as your describing around town great a soon as i hit the highway she start creeping up. Ived all ready upgraded to open system i got tired of cooling bottle issue with renix well i replaced my flex fan even thought it seemed to be working doing this issue was gone instantly no mind you also i have no loss of coolant or crapy pressure bottle any more.
Thread Starter
Junior Member
Joined: Jul 2012
Posts: 83
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From: Denver
Year: 1988
Model: Cherokee
Engine: 4.0 Litre
Just wanted to give a little update. It looks like the new bottle is working a little bit better. I headed up the same hill and the temp only really got up to about 220ish, whatever temp the mark is that is right past 210, still a little warm. Kind of hard to gauge since it was only about 85* ambient, I didn't have a bunch of people in the car so no load really. Maybe just replace the radiator this winter, still drives fine around town, even when I would get off the highway it never really got above 210.
Old School CF Moderator
Joined: May 2010
Posts: 9,652
Likes: 3
From: Chattanooga
Year: 2001
Model: Cherokee
Engine: 4.0
Have you actually used a mechanical gauge to make sure that your meter is right? What if you were doing all this **** only to find out your meter is reading hot?
Thread Starter
Junior Member
Joined: Jul 2012
Posts: 83
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From: Denver
Year: 1988
Model: Cherokee
Engine: 4.0 Litre
Yeah, before I put the new temperature sensor in, I did. That was why I put the new one on. After I put the new one in I measured it again and what the gauge was reading and what the meter were reading were just about the same, maybe 10 degrees diffrerence but they almost matched up.
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