Belts

Stupid question- how much play should you have in the belt that spines the alternator. Mine has a ½” of up and down movement is that to much and should I adjust the belt or replace it.

Should I be worried about the belt for this weekend?

Replace your belt if you see any signs of cracking or frayed edges.

As for tension, probably hard to put a measurement on it but I tighten mine fairly tight with a breaker bar to get some leverage. I don't go super tight, just enough so the belt doesn't slip at any rpm. An alternator under a heavy load (Killer stereo)may need to be tighter as it may slip after the batteries are drawn down from a float with the tunes on.

Over tightening will affect bearing life in the alternator and raw water pump so don't over do it. I also spray my belts with a belt dressing when I change my oil.