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CF Veteran
noob with a problem
Hello,
I recently purchased a one owner 01 Cherokee sport. I have always wanted one and finally was able to get one! Anyway the thing runs great except my temperature gauge is not accurate. I was trying to remedy the problem and have been un able to solve it.
The first symptoms of a problem was at idle sitting at stop lights, the gauge would rise to about 220 and then the auxiliary fan would kick on and it would stay there. as soon as I started driving again the temp would go back down and sit just under 210. so to try and fix the problem I put in a new thermostat. Now that the thermostat is in my gauge is on the other end of the spectrum, it will rise to about 130 and sit there. So far I have tried putting in a new thermostat sensor and that has done nothing. I have been looking all over the forums for an answer but can not seem to find one. Anyone have and idea or input?
I recently purchased a one owner 01 Cherokee sport. I have always wanted one and finally was able to get one! Anyway the thing runs great except my temperature gauge is not accurate. I was trying to remedy the problem and have been un able to solve it.
The first symptoms of a problem was at idle sitting at stop lights, the gauge would rise to about 220 and then the auxiliary fan would kick on and it would stay there. as soon as I started driving again the temp would go back down and sit just under 210. so to try and fix the problem I put in a new thermostat. Now that the thermostat is in my gauge is on the other end of the spectrum, it will rise to about 130 and sit there. So far I have tried putting in a new thermostat sensor and that has done nothing. I have been looking all over the forums for an answer but can not seem to find one. Anyone have and idea or input?
Herp Derp Jerp
Join Date: Nov 2011
Location: Parham, ON
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Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
The original problem is the textbook indicator that the mechanical fan's viscous clutch has failed.
As for the thermostat/temp sensor problem that's very interesting.
CF Veteran
Join Date: Sep 2010
Location: Mercer County, NJ
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Year: 2001
Model: Cherokee
Engine: 4.0L I6 HO
Hello,
I recently purchased a one owner 01 Cherokee sport. I have always wanted one and finally was able to get one! Anyway the thing runs great except my temperature gauge is not accurate. I was trying to remedy the problem and have been un able to solve it.
The first symptoms of a problem was at idle sitting at stop lights, the gauge would rise to about 220 and then the auxiliary fan would kick on and it would stay there. as soon as I started driving again the temp would go back down and sit just under 210. so to try and fix the problem I put in a new thermostat. Now that the thermostat is in my gauge is on the other end of the spectrum, it will rise to about 130 and sit there. So far I have tried putting in a new thermostat sensor and that has done nothing. I have been looking all over the forums for an answer but can not seem to find one. Anyone have and idea or input?
I recently purchased a one owner 01 Cherokee sport. I have always wanted one and finally was able to get one! Anyway the thing runs great except my temperature gauge is not accurate. I was trying to remedy the problem and have been un able to solve it.
The first symptoms of a problem was at idle sitting at stop lights, the gauge would rise to about 220 and then the auxiliary fan would kick on and it would stay there. as soon as I started driving again the temp would go back down and sit just under 210. so to try and fix the problem I put in a new thermostat. Now that the thermostat is in my gauge is on the other end of the spectrum, it will rise to about 130 and sit there. So far I have tried putting in a new thermostat sensor and that has done nothing. I have been looking all over the forums for an answer but can not seem to find one. Anyone have and idea or input?
Should I try another thermostat? Again thanks for the help!
CF Veteran
Join Date: Jan 2013
Location: west chester, pa
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Year: 1999
Engine: 4.0
Thank you for the responses, I will look into the fan clutch. As fas as the temp of the stat its 195. I drove it a little last night and it's actually heating up to about 150. Still goes no higher though. Also pretty positive I installed the stat correctly, remove housing, clean everything up, insert new stat into recessed hole and reinstall housing. Should I try another thermostat? Again thanks for the help!
I put it in the same direction as the old one came out. Not sure how to describe it but as long as the old one was in correct it should be. the stat i bought didn't have a top or bottom mark. If it was in wrong wouldn't I overheat though??
A little more info from this morning, I tried to run the heat this morning and it wasn't hot. there was a heater core installed right before i bought the jeep. could my system need flushed? i did notice some very small flecs of what appeared to be dried antifreeze in the radiator filler neck and didn't think anything of it till now.
A little more info from this morning, I tried to run the heat this morning and it wasn't hot. there was a heater core installed right before i bought the jeep. could my system need flushed? i did notice some very small flecs of what appeared to be dried antifreeze in the radiator filler neck and didn't think anything of it till now.
Seasoned Member
Join Date: Jun 2011
Location: north, ga
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Year: 1995
Model: Cherokee
Engine: 4.0
I put it in the same direction as the old one came out. Not sure how to describe it but as long as the old one was in correct it should be. the stat i bought didn't have a top or bottom mark. If it was in wrong wouldn't I overheat though??
A little more info from this morning, I tried to run the heat this morning and it wasn't hot. there was a heater core installed right before i bought the jeep. could my system need flushed? i did notice some very small flecs of what appeared to be dried antifreeze in the radiator filler neck and didn't think anything of it till now.
A little more info from this morning, I tried to run the heat this morning and it wasn't hot. there was a heater core installed right before i bought the jeep. could my system need flushed? i did notice some very small flecs of what appeared to be dried antifreeze in the radiator filler neck and didn't think anything of it till now.
Seasoned Member
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Location: north, ga
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Year: 1995
Model: Cherokee
Engine: 4.0
Also look at the heater control valve. If its there throw it in the trash. Plug the vacuum line and use a T fitting to run the heater hoses.
Member
Join Date: Apr 2012
Location: Minersville Pennsylvania
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Year: 1991
Model: Cherokee
Engine: 4.0 H.O.
Just installed a new radiator from advanced auto parts into my 1991 4.0
I've been having slow over heating issues on long drives, I replaced the waterpump, thermostat, heater hoses, upper/lower hoses, thermostat housing about 4 months ago with this problem still happening.
I just put the radiator in and I got about 4 miles before it started over heating rapidly, I really hope I'm not an idiot that left one of those safety caps on the new radiator and slid the hose over it
This has made me sick, venting now and then returning to taking it all apart again....
The strange thing is I didn't have any heat coming from the vents? If I left that cap on it should have still had flow to the heater core I would think... unless I got some corrosion or that cap plugged somewhere...
I've been having slow over heating issues on long drives, I replaced the waterpump, thermostat, heater hoses, upper/lower hoses, thermostat housing about 4 months ago with this problem still happening.
I just put the radiator in and I got about 4 miles before it started over heating rapidly, I really hope I'm not an idiot that left one of those safety caps on the new radiator and slid the hose over it
This has made me sick, venting now and then returning to taking it all apart again....
The strange thing is I didn't have any heat coming from the vents? If I left that cap on it should have still had flow to the heater core I would think... unless I got some corrosion or that cap plugged somewhere...
I checked the fan and it all seems good. It doesn't lock up or have any wiggle in it. I can spin it around with a little resistance.
I picked up a new stat and will put that in when I get home.
Thanks again for the help
Moderator of Jeeps
Join Date: Jul 2011
Location: Frederick, MD from Cleveland, OH
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Year: 1993 YJ Wrangler
Engine: 4.0 I6
Just installed a new radiator from advanced auto parts into my 1991 4.0
I've been having slow over heating issues on long drives, I replaced the waterpump, thermostat, heater hoses, upper/lower hoses, thermostat housing about 4 months ago with this problem still happening.
I just put the radiator in and I got about 4 miles before it started over heating rapidly, I really hope I'm not an idiot that left one of those safety caps on the new radiator and slid the hose over it
This has made me sick, venting now and then returning to taking it all apart again....
The strange thing is I didn't have any heat coming from the vents? If I left that cap on it should have still had flow to the heater core I would think... unless I got some corrosion or that cap plugged somewhere...
I've been having slow over heating issues on long drives, I replaced the waterpump, thermostat, heater hoses, upper/lower hoses, thermostat housing about 4 months ago with this problem still happening.
I just put the radiator in and I got about 4 miles before it started over heating rapidly, I really hope I'm not an idiot that left one of those safety caps on the new radiator and slid the hose over it
This has made me sick, venting now and then returning to taking it all apart again....
The strange thing is I didn't have any heat coming from the vents? If I left that cap on it should have still had flow to the heater core I would think... unless I got some corrosion or that cap plugged somewhere...
Moderator of Jeeps
Join Date: Jul 2011
Location: Frederick, MD from Cleveland, OH
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Year: 1993 YJ Wrangler
Engine: 4.0 I6
I'm not following this over a couple pages, but replace your mechanical fan clutch if you're overheating below 15mph