Yep, engine tick is usually either a small exhaust leak, or lifters that are sticky and not pumping back up.
I have solved the sticky lifter tick a few times using a product called Seafoam. Essentially when you are planning your next oil and filter change, buy a can of Seafoam. Read the directions but basically you add it to the engine oil and run and drive the engine so it circulates with the oil.
What it's doing it cleaning the oil system by dissolving the buildup or varnish and sludge that tends to cling to things like the inside of lifters and rocker trunions and such.
Once it's been run through the system according to the directions, drain the oil, maybe flush with a quart of cheap thin oil, and then perform your oil change as usual. New oil, filter...yata yata yata.
Then go for another drive, and report back about the engine tick.