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Old 09-11-2007, 01:14 AM   #1
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Whats your normal operating temp?

The temp guage has markers at what...150, 210 and 250 degrees right? mine pretty much stays at 210 all the time. and the engine bay and hood seem to get awfully hot. hotter then my previous truck or wifes current car. is this normal? or am i having an overheating problem? my coolant levels seem to be fine.

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Old 09-11-2007, 01:19 AM   #2
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you have a 4.0L and they do typically run ~210 degrees. Its perfectly normal. All of mine do.

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Old 09-11-2007, 01:20 AM   #3
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210 is on spec for 4.0, mine runs that as well.

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Old 09-11-2007, 09:01 AM   #4
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I have the 4.0 too and mine runs at about 200-205*. It will barely hit 210 when its in the middle of traffic on a hot day or something like that. So Im sure you are fine.
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Old 09-11-2007, 09:27 AM   #5
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ok great. thanks everyone!
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Old 09-11-2007, 11:40 AM   #6
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210 with my 2.5L
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Old 09-11-2007, 03:17 PM   #7
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A lot of guys will try and do things to remove some of that hot air underneath of the hood, but the engine running at 210 is perfectly normal and actually where it's happiest.
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Old 09-11-2007, 03:28 PM   #8
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If you make it cooler its not gonna run as well? I figured if its running cooler it would prolong the life of the fluids and internals? I was going to put a high flow water cooler in and an aluminum radiator. Is it not worth it?
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Old 09-11-2007, 03:32 PM   #9
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i was thinking about some of the thermo heat shield stuff you can apply to the underside of the hood. not worth it?
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Old 09-11-2007, 03:46 PM   #10
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Better cooling and water flow are never bad things. The 4.0 engine loves to live at 210. It's designed that way. That being said we all know that we stress the engine pretty good when we are wheeling so I don't see a problem with the things you are suggesting Grn and Antwon. It's when people start putting 180 degree thermostats that your engine and PCM start not liking life.
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Old 09-11-2007, 04:17 PM   #11
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Quote:
Originally Posted by GrnTJ View Post
If you make it cooler its not gonna run as well?
Actually - running a 210 is also for emissions. The higher temp helps burn off all the fuel and whatever inside the combustion chamber putting less effor on the catalytic converter, meaning a "cleaner" exhaust.

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i was thinking about some of the thermo heat shield stuff you can apply to the underside of the hood. not worth it?
Louver man! Everybody loves louvers! And because they just look so damn cool!
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Old 09-11-2007, 04:22 PM   #12
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So it wont prolong fluid life or anything?
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Old 09-11-2007, 04:47 PM   #13
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MINE RUNS @ 210 ALSO BUT AFTER THIS PAST SUNDAY WHEN I WENT WHEELING ITS OVERHEATING ,I THOUGH THAT IT WAS THE RADIATOR FULL OF MUD BUT i CLEANED IT AFTER THE TRAIL AND SOME TIMES OVERHEAT AND SOMETIMES NOT I HAVE TO CHECK FOR THE SENSOR CUZ IT LOOKS LIKE IT IS A GAUGE PROBLEM.

PD: SORRY FOR THE CAPS BUT WHERE I WORK I USE CAPS FOR EVERYTHING.
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