1992 Nissan Maxima timing belt or chain tensioner

i have the se model with the 3.0 v6 dohc 24v engine when i start the car i get a loud ticking sound until the engine reaches normal operating temp. then it goes away until cold startup again.i was told this is the timing chain tensioner.my question is twofold.do i have a timing belt or a chain and can the tensioner be replaced. also i have had the lifters changed at 100,000 mi thanks for any help