Heater Control Valve connections

F

frmhrt

Member
Here is a rare one, I think. Maybe familiar for those of you in the Northern Latitudes. I am rebuilding the 1949 ford flathead F5 truck I inherited from my dad. He purchased it new in North Dakota and used it for his farm truck until 1996 after which it was used for fun drives and in parades.
I am finishing up with the cooling system. It appears that he bypassed the heater control valve and directly connected from the intake manifold to the heater back to the water pump. Probably was cold most of time up there so he didn’t care if warmth was produced in the cab. I have searched fordbarn, many other blogs, and google but cannot seem to find the answer to this: On the 1949 flathead, what is the proper sequence of water flow connections from:
The right cylinder head output (hot)
to the heater control valve input (top or bottom connector?)
from the heater control valve output (top or bottom connector?)
To the heater core input (top or bottom connector?)
From the heater core output (top or bottom connector?)
To the water pump input? (cooler)
I hope someone will have experience with these questions and be able to give me some insight.
Thx again, for the opportunity to learn.
alan
 
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I'm sure you meant to say right side head, not intake manifold.

Heater flow valve is screwed into the right side head. There are two outlets, one on each side of the main coolant exit. Use the forward one.

Hose goes from the heater flow valve, across the intake manifold in front of the carburetor, and to the rear where it goes through the firewall to the heater.

Back on the right side, the return heater hose exits the firewall, is supported near the front of the engine with a clip, then down to the right side water pump. (The earlier models had the hose go to a spliced in connector on the bottom radiator hose.)

This from memory, as it's been many years since I had a '49 Ford myself, but I believe the hot water heater connections were all pretty similar through the flathead era.
 
yes, you are correct, meant to say cylinder head instead of intake. I have edited my post. Thank you. Not understanding your sequence of hook ups, sorry. Will study. thx

alan
 
Yes, two connection tubes, the bottom one "y's" off the top which penetrates the firewall into the heater unit inside the cab
 
The control valve is separate from the fresh air heater. If our setups match, the valve is mounted above the heater should look similar to mine. While I've got an I6, the hose connections follow the same convention. Before you get too far down the path, I would check the control valve for leaks. There is always a reason for disconnecting something and you need to discover yours. Assuming everything is fully functional makes for some exciting lessons, in my experience.
 

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Yes, thanks, looks just like it. I did test the control valve with a hose, no leaks but turning off valve does not completely prevent flow. Not sure why my dad disconnected it.

Question: What is the hook up/flow sequence for above? I speculate:
Head out to lower heater connection?
Upper heater connection to lower connection of control valve?
Upper connection of control valve to water pump or radiator return?

Correct?
Alan
 
The connections are as you described. If the valve doesn't fully close, perhaps a manual shut-off valve on the head connection would be worth considering.
 
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