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Old 07-18-2010, 11:57 AM   #1
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Default Running 210 degrees?

Hello All, Im a newbie and just bought a 98 grand cherokee with a 3" skyjacker lift. Arb front bumper with a 8,000lb winch, euro altezza rear lights, Thule ski rack and jks front control arms and a bunch of other parts. My question is my radiator temp is running at about 210 is that normal? It dosent take long either to warm up to temp when I turn it off my overflow can is boiling. Not enough coolant maybe? Looks like there is more water then coolant, what should I do? Thanks
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Old 07-18-2010, 12:01 PM   #2
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210 is normal the coolant boiling not so much.

i would replace the sending unit and do a full coolant flush and see where that gets you. If anything a coolant flush is never a bad thing and a new sensor, specially a vidal one is not a bad thing either.


also, welcome to the site! post pictures of your rig
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Old 07-18-2010, 12:11 PM   #3
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I will try the coolant flush and get a new sender. Thanks so much
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Old 07-18-2010, 01:56 PM   #4
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Also, coolant heats faster than just water, you have to have the coolant/anti-freeze to prevent corrosion, otherwise just water would be better, it heats slower and cools faster. Also make sure you don't have alot of bugs and junk in radiator. Use caution blowing out w/ an air compressor, just a garden hose probably will do best. Repeat every 50k mi or so. (recomended 70k, but...)
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Old 08-01-2010, 05:08 PM   #5
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Is you winch blocking air flow? Check for grass and other debris between the air conditioner condensor and the raditor (sometimes this area will be full of crap).
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Old 08-01-2010, 09:38 PM   #6
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210 is pretty normal for a Cherokee, 260 is bad.
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Steering stabilizers will not cure or cause death wobble, they only mask the real problem that is causing death wobble. Oil pumps do not make pressure, they create flow. Bearing clearence and restrictions make pressure. It's the crank sensor.
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Old 08-01-2010, 10:25 PM   #7
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My 5.9 runs around 195 typically. In the mountians while trailering my bike it would hit 205 pretty quick going up then cool down. Seems a little odd that you are boiling in the overflow tank. You may want to pressure test the cooling system. The radiator cap too. Ive seen bad head gaskets raise the coolant temp due to hot gasses entering the cooling system and raise the pressure enough to cause coolant to push past the radiator cap into the overflow tank. Any contamination in the coolant?
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Old 08-01-2010, 10:36 PM   #8
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Same logic applies to a hairline crack in a head between the compresion chamber and the coolant passages
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Old 08-02-2010, 02:08 AM   #9
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Default 160 deg F unless I leave in running with the A/C on

My 95 ZJ w/318 cid runs at 160 deg F unless I leave in running with the A/C on in the Hot Texas sun, then it will move up to 200-210.

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Old 08-03-2010, 08:06 PM   #10
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My 94 zj with 5.2 runs 210 with or with out ac running. Normal
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Old 08-03-2010, 10:16 PM   #11
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210 is a normal operating range. No idea why you're boiling over. Test the cooling efficiency of your mix before you bother with a flush. also might be short on coolant
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Old 08-04-2010, 12:27 AM   #12
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also are you sure you are boiling over? because when you turn your car off the pressure of your engine pops the rad cap a bit and releases some coolant back into the overflow tank making it seem like its boiling. If it is doing it while the car is on however....


but try a new rad cap with the correct PSI rating. that may be your problem too!
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4.0 - AX-15 - NP231 - 35x12.5" Baja Claws - lots of engine add ons - and lots of goodies (but not enough...)
Homemade Roof Rack
custom 3/8" front bumper


hard work and respect get you nowhere in todays life... what a shame maybe someday society will become less selfish

selfless over selfish
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Old 08-04-2010, 12:37 AM   #13
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Quote:
Originally Posted by 96_xj View Post
also are you sure you are boiling over? because when you turn your car off the pressure of your engine pops the rad cap a bit and releases some coolant back into the overflow tank making it seem like its boiling. If it is doing it while the car is on however....


but try a new rad cap with the correct PSI rating. that may be your problem too!
x2. Costs 4$ at Autozone and fixed my coolant loss problem
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