So when I went on lunch today at work, and just now as I was getting off work, my cars engine ticked both times. I got to work at 1:30 and started my car at 4:30 to go to lunch, it was a quiet tick. So it was 3 hours in between. Started it up to go back to work...quiet, no tick at all. Then at 9:30, 4 hours and 30 minutes later, it had a louder tick. Again ist just a single tick that lasts for about 3-5 seconds. Then goes right away. Starts in the morning have NO tick at all, has piston slap but no tick. This is driving me crazy. Does my car (honda k24 even have lifters that could tick? and its already had a valve adjustment at the dealer about 10,000 miles ago. Even if it is a valve or lifter, will this tick cause wear? and if it does would it show up in a used oil analysis? again it only ticks 3-4ish hours after the car has been driven. Its just a single tick too. Im lost, should i be concerned? I dont have money to get it checked out. Not trying to beat a dead horse hear...The engine should be clean after 16,000 miles worth of synthetic oil changes. IT ALSO TICKS with the rpm...when i start it up and it revs up to 1500 rpm the tick goes with it then slows down as the rpms go back down. Would a ticking lifter or valve cause any wear anyway? anything to be concerned about?