So i basically have two questions first what do you think a ticking in the motor would be it ticks when its cold and right before the oil gets to it like right when i start it in the morning and then it goes away until i drive it for a about 30 minutes then it starts to tick again i was thinking it was a lifter that was failing so i was going to change the lifter and if i could figure out which one it is can i just change one or do i have to change them all and do i have to do the 2000 rpm breaking again.