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XJ Ask the Question Thread
03-20-2013, 01:55 PM
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Join Date: Mar 2013
Location: West Coast, Oregon
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Year: 1990
Model: Cherokee
Engine: 4.0 liter straight 6
The water pump was replaced a week ago, pulled the thermostat out yesterday and dropped it in a pot of boiling water, seems to work fine. I don't know about the fan clutch, if does have an electric fan and it does come on. When I burp it, I make sure that the *** end of the jeep is quite a bit higher than the front and I burp it by unscrewing the temperature sensor on the back of the head.
03-20-2013, 02:05 PM
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Location: Frederick, MD from Cleveland, OH
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Year: 1993 YJ Wrangler
Engine: 4.0 I6
The water pump was replaced a week ago, pulled the thermostat out yesterday and dropped it in a pot of boiling water, seems to work fine. I don't know about the fan clutch, if does have an electric fan and it does come on. When I burp it, I make sure that the *** end of the jeep is quite a bit higher than the front and I burp it by unscrewing the temperature sensor on the back of the head.
As for open cooling.
03-20-2013, 02:26 PM
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Location: Oregon
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Year: 1996
Model: Cherokee
Engine: 4.0
Might be a dumb question, but whats the point of burping the system? To remove air? Ive asked my dad about it and he just says pour the coolant in and who cares.
03-20-2013, 02:27 PM
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Year: 1993 YJ Wrangler
Engine: 4.0 I6
Yes, it's to get the air out. 'Just pour the coolant in' is fine for 91+ with open cooling systems, but a Renix won't cool effectively with air in the system.
03-20-2013, 02:31 PM
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Year: 1996
Model: Cherokee
Engine: 4.0
Aaah i see. So it is ok for me atleast lol. I know my Z28 had instructions gor burping it but i never bothered then either. Thanks for the info.
03-20-2013, 02:39 PM
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Year: 1994
Model: Cherokee
Engine: Inline 6 4.0L High Output
03-20-2013, 02:51 PM
Junior Member
Either one. If I'm doing more than just topping it off I remove the sensor.
Make SURE you put the sensor back in before you start it...
Make SURE you put the sensor back in before you start it...
03-20-2013, 03:18 PM
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Year: 1993 YJ Wrangler
Engine: 4.0 I6
03-20-2013, 03:23 PM
Junior Member
It's less than an inch from the back right corner of the valve cover right on top of the head. Kind of a pain to get to.
Be careful not to break it. It's fragile.
Be careful not to break it. It's fragile.
