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Heater Hose Connections

Discussion in 'Early CJ5 and CJ6 Tech' started by skratch, Apr 22, 2018.

  1. Apr 22, 2018

    skratch Banned

    bernardo, nm
    Dec 9, 2016
    My 58 CJ5 has two heaters, I think there is a slight leak in the pass. side heater. After a time when I turn it on it will blow out vapor, I can smell anti-freeze odor most of the time, very slight. Here in NM i don't need the heaters most of the year. I want to disconnect both heaters until needed.
    Question is should I connect the two hoses from the engine block, one at the water pump and other from the head for a return flow or plug the block. It seems to me engines without heater connections would probably have plugs in the block.

    Thanks, John
  2. Apr 22, 2018
    Karl Childers

    Karl Childers Member

    Taos New Mexico
    Sep 6, 2017
    I'll be interested as to how others weigh in on this. To my thinking when you turn the heater off the valve is blocking any return flow so by plugging the engine block you are basically doing the same thing without having a hose that could potentially leak in the future.
    skratch likes this.
  3. Apr 22, 2018

    PeteL If it wasn't for physics, and law enforcement... 2022 Sponsor 2021 Sponsor 2020 Sponsor

    Hills of NH
    Aug 3, 2003
    Either way. Many F-heads never had a heater at all.

    BTW, I've had good luck repairing older heaterr cores. Better metal than modern ones.
    skratch likes this.
  4. Apr 23, 2018

    mickeykelley Well-Known Member

    Republic of Texas
    Oct 10, 2015
    Mine never had the heater so it has factory plugs in both.
    skratch likes this.
  5. Apr 23, 2018

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
    Sep 21, 2002
    If you have a valve that is closed by the heater switch then yes the flow would be blocked, but not all have that. Anyone that does needs to at least be periodically be opened and circulated so crud buildup doesn't occur in the line.

    If there are already hose fittings installed might as well just run a hose between them.
    PeteL and skratch like this.
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