Padgett, I am thinking the same thing ( timing chain has over 214,000 miles) so I am in the process obtaining the chain tensioner, I have the other parts already. As soon as I find out what kinda tensioner to get (counterbored or chamfered) I will replace it. I was just getting any opinions on what I might need to do next if the timing chain did not hush the ratteling. Was just wondering if anybody has ever had any lifters collaps, weaken, rocker arm wear etc etc. Anybody ever have any excessive wear on their cam button/spring??