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Old 05-09-2010, 10:52 AM   #1
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Unhappy Overheating problems.

Hello My name is Jim, I have a 95 Jeep Cherokee sport and I've been having some overheating issues. It has basically a new cooling system. New Radiator, Tstat and water pump. Every thing has been flushed, fresh oil and filter the whole 9 yards. However it still overheats after driving for a while. It will stay at around 210 for awhile and then usually it will begin to raise while idling. When I move again it will still stay hot and continue to rise to the red. The kicker is the Radiator cap is cold and the engine is blazing. It is a brand new cap as well. Seems like a circulation problem but I can't figure it. When the Jeep is cold I can crank it up and let it idle for 30 min and it won't go past 210 but as soon as I start driving it heats up after about 15 or 20 min. Any Ideas? Air bubble possibly? Is there a way to burp the Jeep? Blown head gasket? It runs great when the temp is good. Like the champ it is, it's a warrior I refuse to give up on it. Thanks for any help folks.. ps. I am in Florida so it is hot and humid driving conditions. Keep in mind also that I had all fresh 50/50 fluids in system as well. Thanks. Jim
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Old 05-09-2010, 11:56 AM   #2
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Quick fix but not problem solver, run with your defrost or AC on. This will turn on your electric fan more often. Is your top hose hot? If not you have a blockage somewhere. I don't understand how the cap could be cool. How about your overflow tank? Is the level changing at different temps?
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Old 05-09-2010, 12:52 PM   #3
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Yes the top hose does get hot and the overflow tank does seem to change levels. Higher when hot lower when cold. I believe the switch for the electric fan doesnt work. The Elecriric fan hasnt worked for years. It has always ran hot but not hotter than 210 - 215. My next step I guess is to get the electric fan working and see if there's a improvement. The 3/4 hose connecting the overflow tank and the rad cap is luke warm as well. Everything else is blazing.
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Old 05-09-2010, 12:54 PM   #4
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[QUOTE=Magic1;533614]Yes the top hose does get hot and the overflow tank does seem to change levels. Higher when hot lower when cold. I believe the switch for the electric fan doesnt work. The Electric fan hasnt worked for years. It has always ran hot but not hotter than 210 - 215. My next step I guess is to get the electric fan working and see if there's a improvement. The 3/4 hose connecting the overflow tank and the rad cap is luke warm as well. Everything else is blazing. It tales about 15 min and a little driving and it's close to 260.
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Old 05-09-2010, 01:05 PM   #5
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Try running the motor then shut it off and have someone see how long the clutch fan spins after the motor is shut down. It should only spin 1 maybe2-3 times and stop, if it keeps spinning it means the clutch is worn out...Tj
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Old 05-09-2010, 01:08 PM   #6
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Thanks man I'm gonna get right on it.
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Old 05-09-2010, 01:18 PM   #7
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Fan seems to stop right when engine is shut off. Don't know what to think.
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Old 05-09-2010, 01:38 PM   #8
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Quote:
Originally Posted by Magic1 View Post
Fan seems to stop right when engine is shut off. Don't know what to think.
Must have an air bubble or Maybe the serpentine belt is spinning the water pump the wrong way? (common problem when a new belt is put on...lol) try "Burping the motor...Tj
Read this post http://www.cherokeeforum.com/f2/my-j...heating-19007/ or search for "burping a motor" or here http://www.lunghd.com/Tech_Articles/...BurpAirMod.htm
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Old 05-09-2010, 01:59 PM   #9
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Probably a stupid question but what way should the water pump pulley be spinning clockwise or counter? I have flushed and flushed the system. Ran it with the cap higher then the motor and everything. Thanks for everyones time I appreciate any advice you have.
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Old 05-09-2010, 02:07 PM   #10
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Quote:
Originally Posted by Magic1 View Post
Probably a stupid question but what way should the water pump pulley be spinning clockwise or counter? I have flushed and flushed the system. Ran it with the cap higher then the motor and everything. Thanks for everyones time I appreciate any advice you have.
Let me go check brb...Tj
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Old 05-09-2010, 02:13 PM   #11
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Hmm..wife took jeep so I don't know but I'm looking it up in the manual...Tj
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Old 05-09-2010, 02:15 PM   #12
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Thanks man I appreciate it.
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Old 05-09-2010, 02:16 PM   #13
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It spins counter clockwise http://www.stu-offroad.com/engine/belt/belt-1.htm
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Old 05-09-2010, 03:10 PM   #14
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Water pump is spinning correctly. The belt is positioned how it should be for a 95. I'm at a loss of words.
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Old 05-09-2010, 03:21 PM   #15
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i have same model as you. i over heated before. check your hoses. one of mine was closed/pluged up and one was collapsed. also. u flushed it? so you added coolant back in hopefully. and it could be your water pump. or your ac compressor. do you have cold air in your a/c?
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