Changing your plugs cap and rotor are typically tune-up items and, while good for your car, they will do nothing to quiet your noisy lifter.I have a sticky lifter it'S ticking but not that bad.?Lifters and rotors ain't even related. Put in some STP, and then change the oil in 1,000 or so and do it again. You will probably hear of 46579876 different additives which work well, and they probably all do.
It just needs a little extra lube.