WJ Wont come up to operating temerature - JeepForum.com
 
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post #1 of 9 Old 09-24-2013, 09:49 PM Thread Starter
burgundyjeep
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Wj WJ Wont come up to operating temerature

i have a 1999 Jeep Grand Cherokee and the new motor we put in it wont come up to temperature. It sits right at the mark between 100 and 210. The only way it ever gets near 210 is if its 100 degrees outside. We ran diagnostics and the it says its at 150 most of the time. anybody have and ideas?

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post #2 of 9 Old 09-24-2013, 10:05 PM
new2site
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Stuck open thermostat ...?
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post #3 of 9 Old 09-24-2013, 10:07 PM
Jaspah
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Quote:
Originally Posted by new2site View Post
Stuck open thermostat ...?
That's my guess.
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post #4 of 9 Old 09-24-2013, 10:08 PM
COL
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Thermostat is stuck open. You need to replace it. I believe they come with 195* T-stats stock, but you could go to a 180* too.
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post #5 of 9 Old 09-25-2013, 09:26 PM Thread Starter
burgundyjeep
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That's what i thought at first but it is still doing it.
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post #6 of 9 Old 09-25-2013, 10:33 PM
COL
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Did you put a T-stat in it? Did you check to see if your gauge is accurate? Warm it up by driving it ten miles then use a thermometer to actually see how hot the coolant is. Inferred laser thermometers work great.
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post #7 of 9 Old 09-26-2013, 07:11 PM Thread Starter
burgundyjeep
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Believe it or not me and my dad did all that. The new thermostat might be stuck so we just ordered a new thermostat today and were going to put it on. Ill let you know what happens.
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post #8 of 9 Old 09-26-2013, 07:59 PM
pinky2252s
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Quote:
Originally Posted by burgundyjeep View Post
Believe it or not me and my dad did all that. The new thermostat might be stuck so we just ordered a new thermostat today and were going to put it on. Ill let you know what happens.
Boil the thermostat you have and see if it opens and closes.

Is it broken?

Colorado Jeep Club Member #2252
2001 Laredo, 2004 Special Edition
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post #9 of 9 Old 09-28-2013, 04:55 AM Thread Starter
burgundyjeep
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Boiled it and it didn't work, but we did put a new thermostat in and that's working fine now. I believe it was a 195*.
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