Heater motor conversion

Boeing

Boeing

Member
Original heater on my 1946 F1, because my 6v heater motor had some issues with the wiring, and due to the fact that the truck is now 12v I decided to change the 6v motor to a 12v motor. I realize that there are some modifications to accomplish in order to switch the motors. I cut the bolt extensions on the shaft side. Now I realize that the fan assembly will not sit low enough. It is about 1 inch too high. I could file off the ¼ inch collar at the base of the shaft. But the motor will still be close to ¾ inch too high. Has anyone completed this modification? If so, I would appreciate some help with this mod. Thanks
 
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It would help if we knew that year and model of the car, as well as whether it is a stock or aftermarket heater. Also, if aftermarket, what kind?
 
I have both a stock heater and an aftermarket Arvin heater to use in my 46 pickup/woodie project. Both have propeller type fans and both are 6v. I also am 12 volt converted. Neither of these heaters that I just bought at the Portland swap meet have operable motors. Surely there is a motor out there from a toyota or something else in the junkyard that would yield a good motor and fit in our heaters. I like this kind of thread, but any new ideas?
 
Take the existing motor to Napa Auto Parts and see if they can match the dimensions to a 12 volt motor.
 
I had a 1951 F-1 that I changed engines in and converted to 12 Volts. I used a GM blower resister to drop the 12 volts down to 7 volts. It does have to be mounted in the air stream to keep it cool. To do that I used a hole saw to make a hole in the bottom of the heater case/hsgn and mounted the resister where it would be in the air stream, picked up the 7 volt tap, wired it from the Sw to the resister to the motor and it worked fine for many years. I think I got the resister off an 70's Pont. We had a total out on the lot so I took it off of it. I left the dealership in 1978 to open my own collision Repair shop so it had to be late 70's. Easier and cheaper then buying a new motor or heater
 
Thank you to all of you who have taken the time to reply to my post. I have installed the new 12v motor and mounted the heater under the dash. Now all I need is the correct routing for the heater hoses. I know that one hose is connected to the heater control valve on the top of the right cylinder head. I am not sure where the return line is connected. Does someone have a picture of the correct routing? Thank you...
 
Boeing, I don't have a picture, but on my '47 the return goes to the lower radiator hose on the right side. In my case, that hose is very short and it was a bear to get the fitting in the hose and the hose back on the pump and radiator. There is a special fitting that you install in the hose for this purpose available from C&S and other suppliers.
 
Boeing said:
Thank you to all of you who have taken the time to reply to my post. I have installed the new 12v motor and mounted the heater under the dash. Now all I need is the correct routing for the heater hoses. I know that one hose is connected to the heater control valve on the top of the right cylinder head. I am not sure where the return line is connected. Does someone have a picture of the correct routing? Thank you...
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What motor did you use?
 
Boeing hasn't been on this forum since June, 2018. You can check when a person was last on the forum by clicking on their username and then viewing their public profile. Good luck with your heater motor, hopefully another active user will be able to help you.
 
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