When the engine is cold I get a loud clacking sound from what I believe to a lifter. Maybe a bit of dirt or something but until it warms up it is embaressing. Silly question but how much trouble to remove it and clean it up? I guess side cover and valve cover will come off, loosen the rocker arm shaft and pull out the push rod, then pull the lifter. What is the best way to determine which lifter? Anything I missed out or is there a simpler way?