Since I've had my 1965 f250 I've noticed that the heater has been bypassed. I want to replace the heater core before winter hits but I'm not sure what part number to look for. I know I have the 12v ford fan, but not sure what part number to look for.

Thanks for the help!

 

I find it pretty easy to go to a web site like Napaonline.com and put in the vehicle type and then search for vehicle specific parts. If I plug in your 1965 F250 as my vehicle and then search heater cores I only get one choice.

https://www.napaonline.com/napa/en/p...519_0194796274

Visually it looks correct to me.

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How do you know the heater core is bad?

If your truck has the deluxe fresh air heater with two cables mounted under the dash (to the right of the steering column) on a bracket, one of those cables controls the heater water valve.

The valve is notorious for leaking and/or getting rusted up internally.

I suggest you hook up the heater, then see what the problem is.