taking lifters apart is not a major thing, i have done this many times. i kinda play things oldschool, all lifters seemed to be in good condition i just happened to clean them up a bit more, obviously did a oil change before i started the car, and thru in a quart of mavel oil, the noise changes alot at diffirent loads and rpm's and in gear ect, going down the road you dont hear it, but sitting at home idle you hear it then it goes away ect ect