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Thread: 1999 Cherokee heater issue

  1. #1
    Join Date
    Nov 2012
    Location
    Long Island
    Posts
    30

    Default 1999 Cherokee heater issue

    Picked up a few days ago what is now my 4th jeep. And yet I've never experienced this problem yet but, warming up my truck on the driveway engine comes up to temp and the heater blows cold yet when I drive away the heat comes up perfectly. Fluids are fine no leaks running 210 is about rite. Any thoughts. It's a bit different then my 95' slightly.

  2. #2
    Join Date
    Sep 2009
    Location
    Chico, CA
    Posts
    29,847

    Default Re: 1999 cherokee heater issue

    I would suggest checking your water pump. They have plastic impellers that can wear out and cause a lack of pressure. I think they are partially worn out and need higher speed to get the needed circulation.
    230 hp 4.3L Chevy
    Built 4L60E with manual lockout
    Atlas 4 speed
    Griffin radiator
    On board air
    Warn 9.5ti on custom bumper
    7.5" RE front and bastard pack rear on custom long arms
    30 gal gas tank
    lockers
    And a bunch of other stuff

  3. #3
    Join Date
    Nov 2012
    Location
    Long Island
    Posts
    30

    Default

    Sounds logical. If its the same as my 95' last time I changed that one it wasn't plastic. Definitely metal blades

  4. #4
    Join Date
    Jun 2010
    Location
    Calgary, AB
    Posts
    1,123

    Default Re: 1999 cherokee heater issue

    Wifey's TJ was the same,.. it was low on coolant
    Stock:
    2007 SRT8 Grand Cherokee w/2008 upgrades
    2004 TJ Rubicon
    2000 Cherokee Sport 2 Dr - Donor
    2000 Grand Cherokee Laredo
    1990 Comanche Eliminator
    1990 Comanche Sport Truck
    1989 Comanche Sport Truck
    1988 Comanche
    1986 Comanche Metric Ton Turbo Diesel
    1989 Cherokee Chopped Comp Rig

    and thats just the jeeps

    WWW.RACINGFORTHECURE.CA

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