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Heater control valve replacement

posted by  b4_ford on  Sat Jul 11 09:43 CST 2009
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last visit: Wed Sep 22 02:10 CST 2010
[RELATED]

About to replace the heater control valve in my 1975 164. It is the same as most 240 heater control valves. Do I need to drain the radiator or will spillage be minimal when I disconnect the hoses?








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    Heater control valve replacement 140-160 1975

    posted by  walrus3 on  Sat Jul 11 10:12 CST 2009
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    Not more than a gallon....
    It's messy stuff, though, and cats like it.
    If you have a functioning block drain, down by the oil filter, that is the place to drain it.
    (For some reason most cars DON'T have a drain valve there, just a plug.)
    You can drain the radiator, pull the thermostat and siphon it by sticking a ΒΌ" plastic tube down passage
    into the block. Have the tube full of water before you start. You'll probably get about 2 gallons
    that way and if the heater valve is open you may drain most of the coolant.
    btw it is good to put the model and year of your car in the place provided.
    --
    George Downs, Bartlesville, Heart of the USA!








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      Heater control valve replacement 140-160 1975

      posted by  b4_ford on  Sat Jul 11 10:26 CST 2009
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      last visit: Wed Sep 22 02:10 CST 2010
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      Usually I mention the model but since this part is most common in 240s I didn't get specific. Thanks for the advice. This is a good excuse to flush the coolant anyway, it needs it.








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        Heater control valve replacement 140-160 1975

        uid 27's pic
        posted by  Art Benstein on  Sun Jul 12 00:27 CST 2009
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        last visit: Fri Oct 17 20:10 CST 2014
        [RELATED]

        I know what you mean about posting by model. Some folks look at all RWD (where this appears) but most look just in their section, and 200 grabs the widest audience.

        Just thought I'd add my experience changing these in 240s. When I drain the coolant from the block drain, I use my garden sprayer pressure tank at the reservoir to force as much out as I can, yet the heater loop remains immune even with the valve wide open. What it boils down to for me, is expecting some spill when I get the hose loose from the valve. Put down some towels and bring a pan inside to put underneath before you do this. It never amounts to more than a few ounces.

        I suppose I could clamp the hoses as an alternative to draining, but my cars are always late for a flush and fill.
        --
        Art Benstein near Baltimore

        Don't sneeze when someone is cutting your hair.







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