1939 Ford flathead belt size
 

Hi again everyone!

Quick question:
What fan belt size would be correct for my 1939 Ford flathead? The belt would cover both water pumps, the generator, and obviously the crankshaft. I tried measuring the old one and I got around 53 inches, but it’s a bit worn and not the most accurate. I saw some 52 inch ones online and was wondering would those work?? :confused: Let me know what you think is best.

Thanks!!

Re: 1939 Ford flathead belt size
 

Most common is a B51, which is 54" long. (B series belts measure 3" longer than their part number)

Re: 1939 Ford flathead belt size
 

Caddy , that’s why we come to the FordBarn.
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