There is no tension adjustment. Tension is automatically adjusted by the idler pulley.
replace tension put it on
Loosen the tensioner pulley on your 1992 Buick LeSabre. Take the serpentine belt off. Put the new serpentine belt on and tighten it down with the tensioner pulley.
There is no adjustment for ignition timing.
Old age Frozen or misaligned pulley
there is a rattling noise in the area of the serpentine bell
no its driven by the serpentine belt
There is a special tool I saw in a pawn shop that is just for that.
you do not adjust a serpentine belt. the adjustment is done automatically by the tension pulley if belt is loose, purchase a new belt . also check that all pulleys are in good shape before installing new belt
put a wrench on the tensioner pully and pull it to release tension on the belt
with a 9/16 socket and ratchet
I had a 1995 buick lesabre and the A/C compressor went out in the winter time. I waited until spring to replace the compressor. In the mean time, I used a Dayco 72.10 inch belt and bypassed the A/C compressor and it runs fine.