 I have a 2011 Honda Odyssey EXL. It's got 115,000 miles on it, and it was making some noise on the passenger lower. It ended up being the timing chain. So I had the timing chain replaced, the water pump replaced. While they were there, I also had them do the plugs and the coils and had a valve adjustment. And now when you put it, it sounds great when it's idling in park, but you put it in gear and there's a knock.