Belt rubbing water pump

Appreciate the pics kuda. The double-groove alt pulley - this was an AC engine but the PO removed the AC and I guess just hacked together a pulley set-up that would work. Sounds like that's a common thing people do.

Also, clearly my alt. mounting is NOT the same as what you have, so I'll probably replace that. Mine just has a single pivot on the "engine side" of things, which means there's really no way it can be tight enough without a ton of deflection.

So my question is, is it worth it to just replace all of the pulleys and brackets to have the right set-up? I assume the water pump isn't bad but how tough is it to swap out a crankshaft and alternator pulley on the car?


If you have a stock A/C crank pulley, the two inner belt grooves will be the same size as the two belts are the same size and pulleys all the same diameter. The non A/C crank pulley has a smaller diameter for the alt-water pump belt. This may be the main reason why your belt is hitting. Your groove is too big of a diameter than the non A/C pulley.

The grooves for the belts in the alt pulleys are not in the same position for the single and double groove pulleys. It is slightly off front/rear.