To adjust hydraulic rockers, it goes like this.

- Put the motor at TDC
- Adjust both valves on cylinder 1 with a box wrech. Just tighten the nut until the pushrod can barely rotate between your finger tips. Then crank it down 1/2 turn more. That should load up the spring about 0.025", which is ideal.
- Roll the engine 1/4 turn.
- Adjust cylinder 8 the same way

The order is 1, 8, 4, 3, 6, 5, 7, 2 with all 1/4 turns in between. To check you're at the proper cylinder for adjustment, cylinders 6, 5, 7, 2, 1, 8, 4, 3 will have an exhaust valve rocking when adjusting the coresponding valves in the sequence above. i.e. if you're adjusting cylinder 1, cylinder 6's exhaust valve should be starting to rock. It's even easier if you have the intake off because you can watch the lifter

Hope that helps!