i was checking out this damn lifter ticking on google and there is a certified machanic that says sea foam,atf,mmoil and all the others is a waste of time including shooting any cleaner down the push rod!! if we replace the oil pump and the O-ring he guarantee's that will fix the problem of our ticking issues! he said the oil pumps don't last and the pick up tube O ring splits thus not enough oil to lube up there....so i ran my motor today untill it started ticking good and it did start as soon as my gauge showed low pressure ?? apparently changing the pump is a 3 hr job. anyone change their pump/o-ring and still have the ticking ? just wondering!