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Heater control valve

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by 76Jimmy, Jun 29, 2001.

  1. 76Jimmy

    76Jimmy Newbie

    Jun 29, 2001
    Likes Received:
    I bought a 76 jimmy in which the previous owner took the air
    conditioning system out.I am in the process of putting the system back in but i am having no luck with info on the heater
    control valve.Was there a heater control valve in 76 and if not
    how is the coolant regulated?There is one on the engine but the vacuum line to it is not hooked up.
  2. TX Mudder

    TX Mudder 1/2 ton status

    Jul 10, 2000
    Likes Received:
    How much time and $$$ are you spending on reusing the old stuff? Just want to point out a brand new Vintage A/C is around $1100.
    -- Mike

    <font color=blue> At some point I'll be done building my truck and can actually go wheeling. Until then, I guess sex and alcohol will have to do. [​IMG]
  3. HarryH3

    HarryH3 1 ton status Author

    May 31, 2000
    Likes Received:
    Georgetown, TX
    There was no factory coolant flow valve. The amount of heat entering the cab is controlled by an air door under the dash. I installed a manual valve in one of the coolant lines on mine so that I can shut it off completely in the summer. On old rigs it seems that some heat always leaks past the air door and I didn't need that extra heat in the cab with me! [​IMG]

    <font color=black>HarryH3 - '75 K5</font color=black>
    <A target="_blank" HREF=http://www.angelfire.com/super/ThunderTruck>http://www.angelfire.com/super/ThunderTruck</A>
    It's a great day to be alive...

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