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    wallykap's Avatar
    wallykap Posts: 65, Reputation: 1
    Junior Member
    		  
    #1

    Feb 9, 2013, 09:18 AM
    1998 jeep cherokee has minimal heat
    My jeep has low heat. Last summer we changed water pump which had NO vanes to pump water. Engine was back flushed. Recently a freeze plug was replaced and all was good. Temp gauge doesn' t reach normal high temp. A guess would be - from gauge - that temps go up to 160. Any ideas??
    countusin2's Avatar
    countusin2 Posts: 6, Reputation: 1
    New Member
    		  
    #2

    Feb 9, 2013, 10:17 AM
    I know what causes no vanes on a water pump. Antifreeze becomes more and more acidic over time (years of not being changed) finally getting so acidic it can eat though water pump vanes and freeze plugs. I would change the temp sending unit its properly damaged also...
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
    Uber Member
    		  
    #3

    Feb 9, 2013, 10:19 AM
    Reverse flush the heater core.
    ma0641's Avatar
    ma0641 Posts: 15,675, Reputation: 1012
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    #4

    Feb 9, 2013, 10:33 AM
    Quote Originally Posted by txgreasemonkey View Post
    reverse flush the heater core.
    x2
    countusin2's Avatar
    countusin2 Posts: 6, Reputation: 1
    New Member
    		  
    #5

    Feb 10, 2013, 02:00 PM
    Heaters now days are computer controlled using information gathered from the sending units. My aunts car is doing the same thing, unplug the sending unit and the heater won't get hot at all. Of course the water is hot, but without the info the computer won't open the doors that allow the air to flow though the heater core and into the auto..
    ma0641's Avatar
    ma0641 Posts: 15,675, Reputation: 1012
    Uber Member
    		  
    #6

    Feb 10, 2013, 03:20 PM
    Quote Originally Posted by countusin2 View Post
    heaters now days are computer controlled using information gathered from the sending units. my aunts car is doing the same thing, unplug the sending unit and the heater won't get hot at all. of course the water is hot, but without the info the computer won't open the doors that allow the air to flow though the heater core and into the auto..
    True but this Jeep is 15 yrs old. My 96 was still buttons and cables!
    Mcsap9213's Avatar
    Mcsap9213 Posts: 99, Reputation: 10
    Junior Member
    		  
    #7

    Feb 10, 2013, 03:22 PM
    Use cardboard to directly block the radiator if you want a cheap and quick "fix". I had an old Plymouth Acclaim like this and it made a big difference. Not allowing the passing air to help cool it down should give you more heat.

    Just remove it in the spring.
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