The tensioner is the prime chirper, think even a new tensioner could do it in a few miles...pot luck - fix with the penny mod, it works! Alternator chirp when bearing its on its way out as does the power steering pump, have had both of those do that but the failure to seizure was rapid. You could try using a listening rod to locate the source - length of dowel/ long screw driver etc pressed against ear with the other end moved around engine and auxiliaries until you locate the source (carefully of moving parts of course).
