How to adjust roller rockers w/ hydraulic cam. First start up.

Use the firing order and set the adjusters to zero lash and then go half to three quarters of a turn down. When the lifters are not pumped up take your time. It's hard to feel zero lash unless you do it a lot. You can turn the pushrod with your fingers until you feel a bit of drag and that's your zero.

After you get the engine running and have no leaks or other issues you can go back through and double check them.

It will be easier to fell zero when they are pumped up.