1950 Ford Tudor 226 6 cyl Heater System

[Smitty]

Hi All,


On the 226 6-cyl does the coolant flow from the water pump fitting to the heater control on the firewall or from the cylinder head to the heater control on the firewall? Green bible is not clear on this.


Thanks, Steve

[scooder]

In my experience, the water pump hose goes to the upper firewall (heater) inlet and the cylinder head hose goes to the lower firewall it fitting. I've found this to be true on very wide selection of vehicles.
Hope this helps.
Martin

[Dan in MI]

Scooder is correct. Adding the heater control in the circuit the coolant flows from the cylinder head (hot coolant) to the passenger side of the heater control then out the drivers side to the lower nipple of the heater core. Coolant (cooler coolant) then flows out the top heater core fitting to the water pump inlet. Here it mixes with the cooler coolant from the radiator and cycles back through the engine.

[Smitty]

Dan,
Looks like you have a Ford, is this how yours is setup, hot from the head going to the heater control first then out to the heater core, finally from the heater core to the water pump?
Steve

[Dan in MI]

Yes but mine is a V8. That is the way it is plumbed. This came from the "The 1949-50-51 Ford Book" from The Early V8 Club of America page 5-16. You want the highest temp water going to the control valve first (so there is no hot water in the core during the summer). The return from the water pump is on the suction side of the pump (inlet).

[Dan in MI]

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Here is a flow diagram that may help.

[flatford8]

Originally Posted by Dan in MI

Scooder is correct. Adding the heater control in the circuit the coolant flows from the cylinder head (hot coolant) to the passenger side of the heater control then out the drivers side to the lower nipple of the heater core. Coolant (cooler coolant) then flows out the top heater core fitting to the water pump inlet. Here it mixes with the cooler coolant from the radiator and cycles back through the engine.

I believe going in the bottom fitting and out/returning from top fitting, helps to purge the air trapped in the heater core……Mark

[Smitty]

I am thinking what makes sense is for the hot leaving the head then to control valve then to core and return to the water pump. First stop being the control valve then to heater core.. You can shut off flow of hot coolant to heater core.

[FortyNiner]

The flow for 226 in my '49 F1 (with a control value) looks like this:

[Smitty]

On your picture above: The On the large straight line coming out of the control valve (top), where does that line go? The bottom line coming out of the engine, does that connect directly to the heater core? The last one goes between the heater core and the curved outlet on the control valve.

[FortyNiner]

Top line from water pump to temp valve
Middle line from temp valve to heater core
Bottom line from heater core to head

[Smitty]

Sounds correct as Shoebox had described it. Does hot water flow from water pump or from head?

[FortyNiner]

All of the coolant is hot in my view. The water pump pushes coolant and the head is just a return path.

[Zeke3]

Originally Posted by Smitty

Does hot water flow from water pump or from head?

In my experience, the supply to the heater is from the head and the return is to the water pump inlet, suction side of the pump.

[Smitty]

That's the way I read it, first to get hot is line from the head.