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derek costello · 11-14-2019, 03:27 PM

The hot water flows out of the right head connection, ( some have a summer shut-off valve at the head) and then returns to the water pump right side at the pump hose fitting. All these fittings are usually 5/8" hose barb for 5/8" rubber heater hose. I changed the outlet fitting on the head for a 45degree fitting instead of the ugly shutoff valve as the valve is also to restrictive, I used a cable controlled water valve ($20. eBay). and installed it behind the heater. Folks say that the Ford system of having the hot water sourced from one side of the engine, makes that side run slightly cooler but we must remember that both pumps pull from a common bottom tank and return to a common top tank at the radiator so temperatures even out!

11-14-2019, 03:27 PM	#4
derek costello Senior Member Join Date: Oct 2019 Location: Niagara Falls Canada Posts: 117	Re: 52 v8 flathead heater The hot water flows out of the right head connection, ( some have a summer shut-off valve at the head) and then returns to the water pump right side at the pump hose fitting. All these fittings are usually 5/8" hose barb for 5/8" rubber heater hose. I changed the outlet fitting on the head for a 45degree fitting instead of the ugly shutoff valve as the valve is also to restrictive, I used a cable controlled water valve ($20. eBay). and installed it behind the heater. Folks say that the Ford system of having the hot water sourced from one side of the engine, makes that side run slightly cooler but we must remember that both pumps pull from a common bottom tank and return to a common top tank at the radiator so temperatures even out!