I am adding an accessory heater. How do I tie in the hoses into the coolant and at what point? What should I use for a shut off valve? Thanks for any answers in advance!
I run a '37 Ch**y heater in my AV8 roadster. The hot water "in" hose should come out of the right head thru the threaded boss forward of the outlet. The return hose should go into the lower right engine inlet hose that connects the radiator. This lower connection is made thru an accessory ****** that can be bought thru any early ford parts supplier for about $5. Make sure you run the hot water into the lower pipe on the heater and the return out of the top. I don't use a shut-off valve. When it's too warm for heat, I install a by-p*** hose. A shut-off is in future plans.
One hose line would connect to a fitting in the p*** side head....usually to one or other side of the radiator hose outlet in the head. These generally have a manual shut-off valve in the fitting. The other hose line would go to a fitting in the lower (p*** side) radiator hose. Sounds goofy but that's how they did it in the '39-42 flatheads. You can buy the fitting from MAC' ANTIQUE AUTO PARTS. You pull the lower hose, cut an opening about 3" from the engine side, place the inner and outer pieces of the fitting into the hole, and tighten it up. Now you will have a heater hose fitting IN the radiator hose! Another choice would be if your water pump has the opening and fitting for a heater hose barb. This is more common on the later flatheads.
I'm trying to follow here... Each head on my flatty currently has an outlet where I have a temperature gauge installed. Each of my water pumps also have outlets where I have temperature gauges installed. Could I install a hose ****** in one of the heads and another in one of the water pumps and put my heater core in between the two and have a working heater set up? I'm looking at the retro vintage air solution. Thanks!!!
That should work. I bought a flathead industrial engine a few years ago, and it had the setup mentioned by @Fortyfordguy. It had a fitting in one of the lower rad hoses that sandwiched the fitting between the innef and outer surfaces. You would make a hole in the lower tad hose and then place the fitting through the hole, place a metal “cap” over the fitting sticking out of the hose, then tighten a nut down onto the metal “cap”. Kind of hard to explain. The other hose was attached to the PS head which had a hose ****** fitting threaded into it.
What engine do you have? Speedway sells a pair of pumps with outlets on each pump for the '53 engine. I'm ***uming these are what you have. If you do, then the hose should route from the right-side pump fitting to the heater inlet and return from the heater outlet to a fitting on the right head. I've got to ask why you have temp gauges running from your water pumps? I understand running one on each head, but four is kind of overkill. I would suggest that you install a shut-off valve at the head so that you don't have hot water running through your heater in the summer. I suppose you could install the shut-off at the pump outlet if you have room for it. '37-'48 water pumps, notice no threaded outlets: '53 water pump from a different vendor, right side with outlet. Drivers side has no outlet.
You could drill & tap side of block in water jacket & tap one waterpumps To keep low out of view so much , Or Tap a head , Block & head is feeds Return between lower rad hose & one of pumps , Choosing of nice looking small fitting & valve's Clean looking. Or you will need a T on one heads for heater feed with one of Temp gauges. Tapping water pump below propeller Side or front side 90's or straights .
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