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Heater Blows Warm Air

Discussion in 'Early CJ-5 and CJ-6 Tech' started by Renegade ll, Jan 9, 2019.

  1. Jan 10, 2019
    45es

    45es Sponsor Sponsor

    Naches, WA
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    Depending on how the heater hoses are arranged, they may be providing the bypass function.
     
    Jw60 likes this.
  2. Jan 10, 2019
    sterlclan

    sterlclan Member Sponsor

    exploring the...
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    Put it in front of the grill. Air pressure pushing on cardboard on the radiator is no good. Ate a three core with the fan after the cardboard pushed the core out.
     
  3. Jan 11, 2019
    Norcal69

    Norcal69 Member

    Cottonwood, Ca
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    I have a piece of a realtor sign. It’s that plastic that’s corrugated like cardboard. Covers about 1/3 of my aluminum radiator. Otherwise I wouldn’t crack 150 in 40 degree weather.
     
  4. Jan 11, 2019
    NCRenII

    NCRenII yellow fever Sponsor

    Far Nor Cal
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    I'd be curious if a little re-plumbing may enhance heater function in the winter. The heater core is essentially a radiator in a box where air is circulated into the cabin. A single inlet of warm air and leakage to atmosphere. Seal up the cabin, and once "prssurized" the heater fan ceases to move air efficiently while at the same time outside air (cold) keeps coolant cooler than needed to heat the cabin. A short duct from near the floor of the cabin back to the heater box would allow "recirculation" thereby allowing warmed air to be re-heated. Installing carpeting, or other insulation would also help retain heat.
    In order to "warm" air going to the cabin the engine coolant needs to reach a warm temperature and then have air circulation (through the heater core). Restricting flow through the radiator by choosing a thermostat with the smallest i.d. will restrict water flow and a smaller radiator can reduce cooling off of water. This would require modification seasonally (i.e. short of installing adjustable valves the throttle flow).
    Cardboard or vinyl radiator is a good way to restrict flow of air, yet fluid will still circulate when the thermostat pops open and quickly cool. Reducing flow through the radiator and increasing it to the heater core (along with re-circulating warm air) are surefire ways to keep engine within operating temps and occupants warm.
     
  5. Jan 11, 2019
    Walt Couch

    Walt Couch sidehill Cordele, Ga. Sponsor

    cordele, Ga.
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    Incorporate same tech used with air-cooled engines to heat cabin as well as the usual radiator type system.
     
  6. Jan 11, 2019
    tarry99

    tarry99 Member Sponsor

    Northern California
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    If you still have the original early type "Placebo" heater whereby your getting cold air through the grill and your heater core and fan is mounted to the drivers side firewall......these heaters for the most part are very inefficient...........If you have a stand alone heater mounted under the dash inside the vehicle much like the Summit version ...........that has the core inside and only heats recirculated
    ( already heated air) these little units in cold weather will bring a smile to your face.................of course your always subject to the tin can effect of the cold metal body and air leaks inside from unsealed areas including moving the air or heat to where you need it including the windshield for defrost purposes..........All of this can be accomplished if you take the time , with this system.
     
  7. Jan 11, 2019
    Oldriginal86

    Oldriginal86 Member

    Pasadena, Md.
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    I removed the air intake hose altogether. Put a piece of screen over the heater intake. Now it draws warm air from inside the engine compartment. Helps a bit.
     
  8. Jan 11, 2019
    tarry99

    tarry99 Member Sponsor

    Northern California
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    Fresh air intake removed? Might want to think about that .............lot's of carbon monoxide under the hood.
     
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  9. Jan 11, 2019
    PeteL

    PeteL Member Sponsor

    Hills of NH
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    Yes. Even the vibration can hurt a radiator.


    In my jeeps, I believe the true "Early" type heater was under the dash over the passenger's feet, no outside intake. But not very effective either. The grill intake came later.

    And H*LL NO - don't intake under-hood fumes! Darwin Award potential right there.
     
    Vanguard likes this.
  10. Jan 11, 2019
    Oldriginal86

    Oldriginal86 Member

    Pasadena, Md.
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    With as much air and ventilation the soft top affords and the way I use this thing there is no chance of any build up of anything including heat.
     
  11. Jan 11, 2019
    tarry99

    tarry99 Member Sponsor

    Northern California
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    When do you think the first grill intake heater came about? .........my 65 CJ had the grill intake and the heater delete panel for the firewall on the drivers side but the dealer stuck in a little heater on the passengers side that only barely made one person somewhat happy...
     
  12. Jan 12, 2019
    NCRenII

    NCRenII yellow fever Sponsor

    Far Nor Cal
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    hmm, heated seats anyone?
     
  13. Jan 12, 2019
    PeteL

    PeteL Member Sponsor

    Hills of NH
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    About '57 or '58, IIRC.
     
    tarry99 likes this.
  14. Jan 12, 2019
    dozerjim

    dozerjim Member

    western New York
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    I suppose next youll be telling me that the engine manifold heater in a 5 window Model A was a problem...LOL...:shock:
     
  15. Jan 12, 2019
    tarry99

    tarry99 Member Sponsor

    Northern California
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    They do work..........to keep that core body temp up.
     
  16. Jan 12, 2019
    timgr

    timgr Jeepin' Nerd Sponsor

    Medford Mass USA
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    Indeed. My KL has them, and heated steering wheel too. The warm seats are nice, but the warm wheel is great.
     
  17. Jan 12, 2019
    PeteL

    PeteL Member Sponsor

    Hills of NH
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    Geez, what are we, men or mice?

    Our forefathers rounded Cape Horn reefing the sails in Force Nine gales, and we can't get to the QuickieMart without butt-warmers?

    :cry:
     
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  18. Jan 12, 2019
    timgr

    timgr Jeepin' Nerd Sponsor

    Medford Mass USA
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    Hey, I worked hard to earn my butt-warmers, I'll have you know! :mad:
     
    Vanguard likes this.
  19. Jan 12, 2019
    NCRenII

    NCRenII yellow fever Sponsor

    Far Nor Cal
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    My wife claims I have the (medical?) affliction of noazital.
     
  20. Jan 12, 2019
    Bowbender

    Bowbender I'm workin' on it! Sponsor

    Northern Minn.
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    I drove my Durango for a couple years before I figured out it even HAD heated seats! :confused: (Yeah, I'm a little slow sometimes....)
     

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