I am in the middle of doing a cam upgrade and have decided to install new liters while I an in there. I plan on installing the adjustable push rods. At one step they put a load on the push rod to deflate the lifters. if I buy new ones will they already be deflated or do they come with oil already in them from the factory. I guess what I am asking,, is do I have to set the push rods differently with new lifters, as compared to the one on the bike that are pumped up?