2011 Honda Pilot, J35 VCM with 123,xxx miles, Compliant.......A/C blowing warm air. Went out to get the vehicle & upon start-up a loud rattle/knocking noise was coming from the engine. I immediately shut it down & checked the oil level....It was within operating range & fairly clean looking. Left it where it was & called the customer to ask about the noise....."Yeah, That's been there for a while" I asked if he would like that looked at? He said "Sure, I guess, But it runs fine" Thought about it being a rocker arm, But the noise wasn't "In Time" with the valvetrain. My long screwdriver to the ear pinpointed it to the timing belt area. Tore the covers off & found what I thought was a collapsed tensioner. Called the customer & quoted a timing belt kit, valve adjustment, & a A/C clutch relay, Customer declined the valve adjustment. Turns out the tensioner was still sound hydraulically, But was worn down or the ram snapped off at the pin hole. Didn't find the tip of the ram anywhere. The tensioner pulley arm had quite a bit of wear as well. He's lucky it didn't jump time, I'm amazed he was more concerned about the A/C!