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Old 12-14-2013, 11:28 PM   #1
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Overheat and no heater??

2000 wrangler sport i6 5spd 130k. Water pump and radiator replaced less then 3yrs ago

I was driving down the highway yesterday when my heat went ice cold. Knowing what would probably happen next. I pulled over and bam 240 degrees. I can't find a coolant leak. But it's all over the motor, fan, hood etc. I started with checking the radiator. Still had coolant. Checked all the hoses. Seemed like a small blockage in the upper heater core hose because well. The hose is hot at the water pump and cold back by the heater core, so I replaced it.

Now, it isn't overheating (as much . . Running at like 210?) but I still don't have heat?

Any suggestions on where to start looking ? I'm thinking the thermostat is probably stuck closed.

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Old 12-15-2013, 10:14 AM   #2
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Sounds like something is plugged up. If one if the hoses going to the core is cold, most likely the heater core is clogged also. Try flushing it both directions.

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Old 12-15-2013, 10:51 AM   #3
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The heater bypasses the thermostat so it's probably not that. With a 2000 you have to suspect a cracked head with those symptoms.
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Old 12-15-2013, 11:21 AM   #4
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Quote:
Originally Posted by AbsolutCaptain View Post
I'm thinking the thermostat is probably stuck closed.
x2 , change it and then throw it in a pot of boiling water and see if it does open ?
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