I think I got off to a bad start with my belts. I can't get the water pump belt tight because the fan belt gets too tight first. I went in to NAPA to get a shorter water pump belt, but after getting back to the shop, the one I had was already shorter than the one listed. Now I think I need a longer fan belt. Not sure what is stock because parts are from different years. I'm using the fan from the old 59ab, but it seems to fit. Not sure if that changes belt size? Anybody have the NAPA belt numbers and or a length? They are both real close to 5/8" wide and fit the pulleys well. My water pump belt is a 25-22552. My fan belt is a 25-08700. One or both need to be different. Confused? I am.... Thanks in advance.

 

Will look today, I have napa belts on mine I think...

 

It's difficult to help people when they fail to mention what the hell they are working on! 8BA is meaningless inre to fan belts.

 

Sorry Bill, but I think the 8ba was a car engine. No belts or manifold when I got it. It's a '49 engine in a '47 2 ton and using the fan from the '47's stuck 59ab. The po of the engine did however install new ball bearing 48 truck water pumps on it, so we are going wide belt.

 

Mine is similar using the wide belts and HD truck fan...

Fan belt- Napa 25-22358
Gen/WP belt- Napa 25-20544

However, your combination of WP and fan pulleys may be slightly different sizes.
I usually end up exchanging several belts to get the right size....

 

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