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Hi. Got a dumb question. The heater control valves on our old fords that are cable operated have an arrow on them. Does it really matter which was the coolant flows through these things? It looks like a simple mechanism inside, and I cant see why it would matter.
The reason I ask. I just purchased a replacement from one of the Ford Restoration Companies which is 3 letters... supposed to be exact replacement for my 69 F100. Well, I receive it today and the arrow on the valve points away from the cable. Every other picture I look at online for this part shows the arrow pointing towards the cable. So If I hook it up like my old one (on the hose from the thermostat going to the heater core), the arrow will be pointing away from the core. Keep in mind it will look identical to the old one which has the arrow pointing towards the core. If I hooked it up according to the arrow, I would put it on the outlet of the core. I've heard this is incorrect as it puts pressure on the core when the heater is not in use.
I have hooked up a hose and run water both directions through the valve and it seems to flow and shut off the same regardless of which side I hook up the supply. So I don't see why it matters, but of course I still wonder why the arrow is there. Any thoughts?
The heater valve goes on the output of the manifold.
Its orientation is based on the control cable that it is connected to it. Meaning, sliding the heater control to the right is "hot" and therefore pushes the cable and, in turn, opens the valve.
The heater valve goes on the output of the manifold.
Its orientation is based on the control cable that it is connected to it. Meaning, sliding the heater control to the right is "hot" and therefore pushes the cable and, in turn, opens the valve.
Exactly. If I hook it up it will go right where the old one is, the cable will function the same too. It will work. But the arrow will be pointing towards the water source.. Unlike my old one. My new valve looks identical to my old one and others on-line. Only difference is the direction of the arrow on the side. Make sense? I'm just wondering if if matters if the coolant flows through the valve in the opposite direction of the arrow.
could it throw your control off in the cab ? all i have seen the arrow points in the path the water flows.
No it will work just like the old one. Looks just like the old one, operates the same. Only difference is the stamped arrow on the outside. My new one points away from the cab. Just wondering why it matters which way the coolant flows through the valve. Valve looks very simple... just a round ball with a hole in it.
OK. I have a way of making my questions way too complicated... Lets try again. Here are two photos. One is my new valve which shows the arrow pointing away from the cable. The other is the exact same valve (visually and the cable operation is the same - pull towards cable to flow) from another vendor which shows the arrow pointing towards the cable. Other online photos show the flow towards the cable also. So.. does it matter which way coolant flows through these valves???
C3UZ-18495-A .. Cable Controlled Heater Water Valve (Motorcraft YG-133) / Available from Ford & auto parts stores
Same: 1965/72 and it's spliced into the inlet to heater core heater hose.
Funny you just posted this. I was getting ready to update again. Earlier today I ordered the part you show from O'R**** Auto parts. It turns out it does in fact matter which way the arrow points. Otherwise why would they not be called multi-directional. There are identical valves (Visually) out there but one will say "flows towards cable" and the other will say "Flows away from cable" . They look like simple ball valves but they are more sophisticated than they look. I put the one on my truck that I got from L*C (shown in my pictures above) and it does not work quite right. It hooks right up, looks just like my old one, but the arrow points towards the front of the truck. It works, but not as well as my old one that died. So, here I go getting long winded again. But, for anyone else wondering it does matter which way the arrow points. Our old fords should have the arrow pointing towards the heater core. I'll update after installing the correct Motorcraft part. THANKS!
If you bought the valve from O'Reilly's, it's not genuine Ford and is probably made in China.
I typed post 10 from memory...as this is probably the 500th time I posted this same info over the past 8 years.
Well... It's listed on the O'reilly web site as "MOTORCRAFT - HEATER CONTROL VALVE" - PART # YG133 and has the Motorcraft emblem. It is a special order, not stocked in the store. I called and ordered it today, the guy said it was Motorcraft. So when I go to pick it up, if it's not the real thing, I"ll leave without it. Hopefully the web site and salesperson are correct. Here is link to what I got.
OK. We are done. Picked up correct Motorcraft Valve from Oreilly, and it works like it should.
If anyone is wondering. If you put on a valve that looks correct and the cable opens and closes as it should, but the arrow points away from the heater core. It will not work correctly. That was how the valve I purchased from LM* was. It made my heater blow very hot on, and pretty darn off off. So even though the valve was closing, I guess coolant going the wrong direction gets through. I don't know, I just know it did not work.
Hello dear people,
This is an interesting topic. So that the flow direction of the water through the valve is important, I have now learned. But I have a question, and that sounds silly for the most part, but I'll ask her, because I do not know how exactly the hoses are connected.
I have a F100 from 1969 and the phenomenon that the heating is always warm, even if I close the valve. Now I want to know from where to where the water flows. So, from the water pump to the heater, or from the intake manifold to the heater ??? The valve is then installed upstream of the heater ??? Correct ??? I've seen a lot of images on the net and there are always different connection scenarios ... so the question. I would be happy about an exact answer .... THANKS ...
Greetings Lars
Is this schema of Fordification correct ??? If yes ... which direction does the water flow ???? Sorry for the probably stupid question :-)
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