Here is the problem I have with needing help with checking valve lash............
I understand the below statement, but I don't understand how you will know when it is open or closed enough for the check? Is it so obvious, or is it experience and feel?
EOIC stands for Exhaust Opening, Intake Closing when working with the intake and exhaust valves in a single combustion chamber. To use this method, pull the valve cover so that you can see the rockers and valve stems and turn the engine over by hand. (You can also use a bump starter if you choose.) Work with only one pair of valves from a single combustion chamber at a time. When you see the exhaust valve beginning to open-you will see the rocker begin to push the valve stem down-you will know that the corresponding intake valve is fully closed with the lifter on the base circle of the cam lobe. Likewise, when you see the intake valve fully open and then start to close (Intake Closing), you will know the corresponding exhaust valve is ready to be checked. Repeat the process with each pair of valves on the engine.