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Jeep wranger still running hot


sicando's Avatar
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09-09-04, 03:57 PM   #1  
sicando
Jeep wranger still running hot

Ok fellas, here is my problem. I have a 1991 Jeep wrangler 4.0 5sp and you guys helped me solve some issues with it. The problem is the temp. guage is showing 210 + while running at regular speeds, and higher if pulling up hills. I have changed the coolant,thermostat and the serpentine belt, and the guage still reads 210+ degrees. My question is two fold. One....is this an ok temp. to run at or do I need to look further to solve this issue...(the thermostat is a 195) and if its too hot for the vehicle, where do I look next?? The help you all have given me has been much appreciated, and it sure is a great help when your a little unsure of your knowledge. THANKS....

 
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09-10-04, 02:57 PM   #2  
I would check the cooling system temp with a thermometer in the rad to get an idea if the guage is even right.At this point I would not worry that much unless you mean it's going in the red zone.Modern cars will run at 220f alot of the time

 
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09-11-04, 02:42 PM   #3  
sicando
OK on that one...the 210 point on the guage is at high noon, and the red zone does not start until 260 degrees, but I was worried cause the temp on thermostat is 195, and the boiling point is 212...seems too close for comfort, but now I hear anywhere from 185 to 240 is an ok temp. I had no clue the range could safely be that hot. Thanks for the reply.

 
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09-11-04, 04:13 PM   #4  
Radiator caps hold pressure to raise the boiling point of water that's why cooling systems don't boil over at much higher temps than 212 F.

 
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09-11-04, 04:23 PM   #5  
For emissions reasons, modern cars regularly run in the 215-225 range normally. Most electric fans are programmed to come on around 225. Most radiator caps maintain a pressure of anywhere from 10lbs to 18lbs. For every lb of pressure the coolant is kept under, it raises the boiling point by 2 degrees.

 
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09-12-04, 10:02 PM   #6  
joecamel75
I am a certified mopar tech and with what experience I have working on wrangler 4.0 it sounds like it is running exactly where it should be!

 
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09-18-04, 12:44 PM   #7  
sicando
Thanks to all who replied. I feel MUCH BETTER about running with the temp. at 210 or 215 degrees. I just wanted to make sure I wasn't ignoring something that needed 'takin care of' Thanks to all !

 
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