Aight. A little Belt Tech …..
As stated before, this PS setup, while I love the passenger side mounted Toyota pump, there is one issue with the 73 F155 in that the harmonic balancer has one wide groove and one narrow groove on the front.
People have a tendency to run the belt that fits the smaller groove and then let the belt just ride the center of the wider water pump pulley and PS pulley.
I’ve seen this often with Saginaw. Thin harmonic. Thin Saginaw. Fat water pump.
These setups always have squealing belts.
Why?
Well, V belts are designed to run on the V sides of the belts and never on the bottom of the belt itself.
If you have a squawking belt and it’s tight, dollars to donuts you will notice one of your pulleys valleys is polished. If it’s polished it’s usually the squeaker.
(I’m normally an OEM belt homer but in this case nothing OEM fit so bear with me)
The belt that finally worked was a 22550
That 22 is the width of a OEM 40 belt. The 550 is that it is 55” long. I probably could have done 22555 or 22560. It’s at the very beginning of the adjustment on the bar.
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Here you can look and see the wider belt is working on the sides in the narrow grooved harmonic balancer
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In this photo you can see how polished the water pump pulley is from the narrow belt
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The only thing I had to trim was a small amount of the fan shroud. The belt has a little flap in it and it was making a little metal noise
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