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Thermostat issues 2001 jeep grand

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Old 06-12-2011, 09:55 PM   #1
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Angry Thermostat issues 2001 jeep grand

Any ideas on this would be great...my car has been overheating for the past couple of months but only when i am stopped (usually 3 min) it will go right back down when i turn on the heat and drive.
here is where it gets ugly. I took off the thermostat housing replaced the t-stat and gasket ( yes i throughly cleaned the old gasket off) and re-assembled. 2 problems occured no heat and a small leak around the thermostat housing. i took it apart again recleaned and replaced with a new gasket now its gushing out water. from what i see the thermostat housing doesnt look warped and the gasket is flush when i put it on the housing.......WHAT AM I DOING WRONG! thanks for any help
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Old 06-12-2011, 09:59 PM   #2
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First off welcome to CherokeeForums.

Seccond, what motor, 4.0L inline 6, or 4.7L V8?

As for the thermostat housing, I'd start with a new gasket and thermostat housing. They're relatively inexpensive, especially when compared to the cost of cooking a motor.

Next, how does the fan clutch feel? If you grab a fan blade (motor off of course) does it spin freely or does it offer some resistance?
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Old 06-12-2011, 10:00 PM   #3
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Did you check the thermostat housing for leaks and how tight did you make it. I broke my thermostat housing 2 times from over tightening a little bit.
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Old 06-12-2011, 10:04 PM   #4
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Hi thanks I have been using this forum for a while now this is the first time i have had such a hard time fixing something on my car
anyway i have a 4.0 v6. i have replace the gasket twice now and used a rtv silicone gasket once (did not work at all even with a 24 hour cure time)

im trying to be easy with that bottom bolt i dont want to over torque but i know its on there good
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Old 06-13-2011, 05:57 AM   #5
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A few things might of happened, the thermostat could of slit slightly out of place, causing the housing not to seal, the housing cracked, Just get a new housing they are 15 bucks, use a good gasket. U should be fine. If the housing isnt cracked I can guarantee u that the thermostat slid a tad.
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Old 06-16-2011, 10:57 PM   #6
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Thanks for all the replies turns out there was a crack in the housing i replaced it and stopped the leaking, but was still overheating...turns out the relay switch that turns the electric fan went...took the whole front off switched it out AND Finally PROBLEM SOLVED.....
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Old 06-17-2011, 09:04 AM   #7
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nexttime u need to replace the relay dont take the front end off save your self the trouble take the rf headlight out and cut a hole in the plastic panel under the light and the relay will be right there just a little flat rate tip from a jeep tech
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