What condition is the Harmonic Balancer?
A damaged / widened keyway will make timing marks off.
A damaged (enlarged diameter) center hole will be off balanced and it my work loose.
A loose H.B. can make a Tack, Tack, Tack sound that my be quieter when metal expands as engine heats up.

dave h.
'89 Raider V6 5spd;Aisin Hubs;; Gen2 LS: frt. brakes, rear coils;U.C.arms;R.trailing arms;idler arm; rear LSD axle w.disc brakes ;2 battery system for Dog's fan; relocated ECU; custom bumpers;J.Baker receiver;Conferr roofrack; t-bar crank.