1996 Buick Century engine ticking at start up

Engine Mechanical problem
1996 Buick Century 6 cyl 119000 miles

i've noticed a ticking sound coming from my engine when I start it up. But it goes away after 5min or so or after driving. Is this something I should be concerned about? Or is there a cheap way to fix it, like using those engine treatments?
I never noticed the sound before cuz I had a bad a/c pulley and that would always whine, after I replaced it I noticed the ticking.