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Thread: Trying to heat things up!

  1. #1
    Join Date
    May 2013
    Location
    Reading pa
    Posts
    1

    Default Trying to heat things up!

    1999 4.0 auto trans cherokee,
    heater only gets warm at best
    Temp stays right at 190
    And lower rad. Hose is cool
    Does Anyone know what gives
    Its hard to play in the snow when you can't see out the window
    Thanks for your help!

  2. #2
    Join Date
    Jan 2012
    Location
    Houston
    Posts
    15,968

    Default Re: Trying to heat things up!

    Especially with the lower hose being cool, it seems that you aren't getting proper circulation of your coolant OR you aren't getting hot enough for the thermostat to open. Might try changing out the thermostat and checking the system for blockage. If I recall, the stock thermostat is a 195* thermostat, you might want to switch to a 190* to get it to open at your temps.

  3. #3
    Join Date
    Sep 2009
    Location
    Chico, CA
    Posts
    29,847

    Default Re: Trying to heat things up!

    Yes, try a different 195° thermostat. The lower hose is cool because your radiator is working. Be thankful for that. But in snow, you can slip a piece of cardboard in front of half of the radiator. Old trick we did in the snow country to keep the engines warmer. Also you might want to flush the system and make sure the core is flowing at full capacity
    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

  4. #4
    Join Date
    Aug 2011
    Location
    NSW Australia
    Posts
    5,210

    Default Re: Trying to heat things up!

    190* - ought to be adequate for some heat ??

    If the lower rad hose is "cool" to touch ... then the temp gauge might be telling you furphies ... so it might pay to check that as well.

    If you still have issues after sorting out/confirming the running temps ... then a blocked heater core or a faulty blend door could give you grief too.

    Theres no heater, coolant flow,control tap, on a '99 ... so thats one less thing to worry about.
    I hate watching simplicity and reliability being ruined by bureaucracy and technology.

    Quote Originally Posted by MattybPDX
    If my jeep is going to be a grocery getter it's at least going to be a friggin awesome one.

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