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Shop Kaiser Willys

Fan Belt
Fits 41-71 Jeep & Willys with 4-134 engine

Part # 647629

New Replacement Fan Belt.

Just like original wide track fan belt for single groove pulleys. Goes around water pump, generator, and crank pulleys.

4-134 engine

41-45 MB
41-45 GPW
46-49 CJ-2A
49-53 CJ-3A
53-64 CJ-3B
55-71 CJ-5
46-53 Truck
46-53 Station Wagon
48-51 Jeepster

Part # Price





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The belt that is on my 1947 willys is a 17-41.4 will this bely #647629 work?

Willys Jeep Parts Tech:
I don't know what belt you have but this belt is made specifically to work with the original equipment on your vehicle.

My belt ran off pully today. Fortunately, I was running slow enough to notice it and got engine off right away. My question is: I have a 1950 Willy's 4 cyl F Head 473 engine. Looks like belt that came off may have been wront. It had 41" on it. Will this one 647629 fit it?

Willys Jeep Parts Tech:
Give us a call and we can help. The belt should be tight, which is can be done via adjustment on the Alternator/Generator at the arm.

What size is this belt?

Willys Jeep Parts Tech:
Not sure what answer you are needing - please give us a call to discuss.

I have a 1954 Army Jeep with a plow on it the plow pump is mounted on top of the generator and all 4 of the pulleys are wide and I need a wide belt to fit do you have a wide belt that will fit.

Willys Jeep Parts Tech:
647629 is a wide belt but you'll probably need a longer one to accommodate the extra pulley. Email a picture of your set up.

My 46 CJ2 engine has a double crank shaft pulley, will the 647629 fan belt fit this engine? Thank you

Willys Jeep Parts Tech:
That would be unoriginal if your double groove. But if you are double groove then use part number: 118866

I purchased a wide belt from NAPA and my crank pulley and water pump pulley are wide but I have an alternator and it has a narrow pulley. Will your belt work on my jeep if I can get it tight enough?

Don't do it. Get the right size pulley or you will tear up your bearings in the water pump and alt.
Willys Jeep Parts Tech:
I would address the improper pulley on your vehicle. It may work if tensioned properly though and not slip, but its not ideal.

Is it the same belt for both 6 and 12 volt systems? (i.e. WO - A9490 / WO - A9490-12)

Willys Tech:
There is no difference between the two.

I have a belt for my L134 engine and it wont fit to small its a three five auto belt the number is 17x1075 is the above belt larger and the correct belt for my engine

Willys Tech:
This is the proper wide belt for your fan belt.
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