1. #1

    normal operating temp vs. towing temp???

    I have a 180 degree thermostat in my 81cj7 258ci. my normal day to day operating temp is between 180-195 degrees. When I am towing approx 1200-1500 lbs the temp will increase as far as 210 deg or so. Is this normal? Would it benifit me to put in an electric fan assembly. Im not a mechanic but, I thought if you put a 180 degree therm. in the engine should run at that temp. Not 30 degrees higher. Am I doing any harm by letting it run upwards of 210 degrees? Thanks. Bryan

  2. #2

    Re: normal operating temp vs. towing temp???

    No matter what your thermostat is opening at 180.What may help you is a lager radiator.Also a transmission cooler would help also if you have an automatic.I assume you have a factory radiator,if you move up too a 3 core your problem will most likley go away.As far as the temp hitting 210,you are not any damage.I run a 190 stat and during the summer I hit 210 a lot.

  3. #3

    Re: normal operating temp vs. towing temp???

    I do have a trans cooler. I will check in to a 3 core radiator. thank you.

  4. #4
    Join Date
    Feb 2009
    Location
    Dayton Ohio Area
    Posts
    6,430

    Re: normal operating temp vs. towing temp???

    I run an electric fan pulling 3300 cfm you could set the temp from 165 to 210. If I keep it at 165 it really cools the jeep well. It was expensive but what a difference.
    "Never look down on anybody unless you're helping him up" - Jesse Jackson

  5. #5

    Re: normal operating temp vs. towing temp???

    ideally the temp would be consistant, but it will rise. 210 degree's is nothing to worry about, once you go over 225 though, you should be cautious.
    It used to be a jeep Thing,
    But all that stuff broke

    -Johnny-


  6. #6

    Re: normal operating temp vs. towing temp???

    My temps run 210 year round. Never had a problem.
    l _____
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  7. #7

    Re: normal operating temp vs. towing temp???

    yes, most MPI motors run at a higher operating temperature.
    It used to be a jeep Thing,
    But all that stuff broke

    -Johnny-


  8. #8
    Join Date
    Dec 2006
    Location
    San José, Costa Rica
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    1,693

    Re: normal operating temp vs. towing temp???

    Quote Originally Posted by jps4jeep View Post
    ideally the temp would be consistant, but it will rise. 210 degree's is nothing to worry about, once you go over 225 though, you should be cautious.
    I agree; if it goes up from 190* to 210*, you dont really have any issues. This is the difference in temp for me between highway speed and standing at a stop light... My eFan does a pretty good job at maintaining 205~210*. When I wheel (4L down in the mud), the temp does like to climb a bit, but nothing that running the fan permanently on will not cure... Until the radiator gets covered in mud, that is. At that point, only cleaning the radiator cures the problem!

    '94 YJ 2.5L, Sperwinch EPi 9.0, RE 4" Std Lift, Adv. Ad. SYE, Woody Shafts, Alloy Axles, ARB Lockers, 4.88 gears, 62mm TB & Spacer, 165A Alternator, Griffin 3" Aluminum Rad, Taurus e-fan w/ DC Controller, Borla Cat-Back, Flowmaster hiflow cat, PD Ignition, 19# injectors, Adj. FPR (42PSI), MOPAR cam, Safari Snorkel, 33" BFG KM2, 15" AR wheels, Xenon H4 lights, KC Daylighters & Slimlites, Sony sound, Pavement Ends Targa Top, Hanson Front Bumper, JCR Offroad rear, AtoZ Rockers, Rhino lined Tub.

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