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Pulley clearance

o1gnah

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Sep 19, 2023
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Location
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I reassembling my 318 and am a bit concerned about the clearance from my crankshaft pulley and fan pulley. I purchased a w/ac water pump (didn’t realize it was w/ac when purchased)”the one that seems to be to close” no rubbing but less than 1/8”. I attached the old one (not reusable) and had much better clearance. My question is what should the clearance be and if this is an issue? Thanks
2 pics of each

Probably just need to get a new pump w/out ac. oe replacement

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Changing the water pump can not do what you are saying, it should be in the exact same position. Doesn't matter if it's a/c or not, same position.
 
Hmmm? Well there is in fact a noticeable gap between the new acdelco and the old rusted pump
 
A/c cars have different pulleys and the belts run in different positions. I didn’t think there’d be a difference in the pump itself though
 
The pulleys should have that built in difference. The number of fins on the impeller is the difference. I probably wouldn't use an auto store pump anyway. I have Flowkooler pumps, they could all come from the same mfr, I don't know. This is a cast iron pump from Flowkooler on my '69.

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Is the center cog in this photo belt usable or is it just a gap?

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