Alright everyone, I've got a 629 with an L20b with probably a lot of miles. I'm not real sure how many it's got on it to be honest, I picked the truck up from some guy who's been driving it like this for about 5 years. But it sounds great and runs great, makes good oil pressure and stays cool and all that. But once it's up to temp, I get a valve tick. Reminds me of my buddy's old Mazda pick up that had one about just as loud. So my question is how would you solve it? Adjust valves? Not change anything with it? Resort to horrible Oil additives? I'm not real confident I can adjust the valves properly myself.