I started noticing a tapping sound coming from my engine when it's cold or after sitting for a few hours. The tapping goes away when the engine gets warmed up. The engine runs perfectly fine. After searching online and listening to videos on youtube I think I've narrowed it down to a stuck or collapsed lifter. I haven't priced the job at a shop yet but i'm thinking of tackling the job myself. I have changed the lower intake manifold gaskets on the same engine about 4-5 years ago but that is as far into an engine as I have ever been. I really want to replace all 12 lifters instead of just the bad one to avoid any future lifter problems. The only thing I'm really concerned about is getting everything (rocker arms,push rods)set back up when assembling everything. Are there special tools to set up the rocker arms? or do I just torque them to a certain torque setting? Anyone else tackle this job before or have any tips that may help me? Any help is appreciated.
By the way here is a video I made showing the tapping sound.