81f100custom Posted March 23, 2021 Share Posted March 23, 2021 Well, no diagram in my truck either. It is coming back to me now, I had this issue last year, couldn't find a diagram online, belt was worn and couldn't read any numbers on it. But i remember getting the belt at autozone, I think they just looked it up on the computer. There should be a tensioner pulley to the passenger side of the ac pump then the belt goes down to the crank. Please see part number in the "fuzzy vision" pic below Does your truck have the rare upper side molding? I wonder if you have an 1985.5 like mine. Another sign would be no Schrader valve on the EFI manifold. Should look something like this. This one does not have A/C showing but that is a separate belt. Link to comment Share on other sites More sharing options...
Gsmblue Posted March 24, 2021 Share Posted March 24, 2021 Should look something like this. This one does not have A/C showing but that is a separate belt. Sorry Eddie, not enough oil in that engine!! Link to comment Share on other sites More sharing options...
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