Nope, Hydraulic roller. If u can hear chatter, just means one is lose. go back through that one, and check. Best way to adjust is Within pair of valves (intake and exhaust) if the exhaust is all the way down than adjust that intake valve and visa versa. I am pretty sure thats the best accurate way w/o fueler guages, since lifters are spring loaded u can overtighten them. make sure when u tighten them there should be slight movement when pushing on head of rocker. There are prob other ways, but thats the best IMO.