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Old 10-13-2013, 03:32 PM   #1
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Exclamation Cooling System is a B*%$!!!

Here we go again.

I posted about having the really bad miss when I warmed up, but after changing the thermostat, the miss and rough idle are now gone.

However, my new problem is that my radiator is bubbling at the front when I get heated up and I'm overheating a little bit. Thermostat is a 195* and at the drive thru the day I changed it, the gauge went up to about 230*. My heater is also completely out. Might a well be AC without even having an AC system in my YJ. Is this a radiator problem, a water pump problem, a heater core problem or all the above? I've tried filling it up with coolant and also today I flushed it, but I believe its leaking out of the radiator. Something is failing on me, might be the whole cooling system, any ideas?

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Old 10-13-2013, 04:33 PM   #2
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Open the radiator cap while it's running (take it off while its cold) let it heat up and see if the fluid in the radiator is flowing or just bubbling. If it's flowing your pump is working. But I'm willing to bet the leak at your radiator is the culprit. And no heat? I would check and make sure the hoses going to the heater core are getting fluid and are not clogged. This part is easy fluid in fluid out still not heat then look into the linkages under the dash and ensure they are working correctly.

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Old 10-13-2013, 05:31 PM   #3
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I did that and absolutely nothing even got into the radiator this time. I overheated big time and not a drop of water made it through to the radiator. I don't know if that's because I may not have installed my new thermostat the right way or because of the flush and where its too low. Any idea?
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Old 10-13-2013, 08:01 PM   #4
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May be the thermostat installed backwards. Or it's not opening either way it needs to be taken apart again.
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Old 10-13-2013, 08:23 PM   #5
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When you did the flush, you filled the radiator correct? Not just the overflow bottle?

Just want to make sure.
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Old 10-14-2013, 12:36 PM   #6
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I refilled the radiator with coolant and water and now the temp gauge won't go up past 110...:l I think I have a problem with my thermostat
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Old 10-14-2013, 12:54 PM   #7
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At his point I'm about ready to rip out the whole front end and replace the whole cooling system, I haven't been on the road with my Jeep in over a month and its been 75 and sunny in KY almost since September...
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Old 10-26-2013, 01:00 PM   #8
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When you installed the thermostat, did you ensure that the weep hole was in the 12 o'clock position?
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Old 10-26-2013, 02:49 PM   #9
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Eventually my pump told me it was bad by weeping fluid and loosening the pulley. By the time it gave our I had already replaced the radiator and then the thermostat. But mine never stopped sending heat to the cabin.

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