Valve adjustment card !!

My son sent this to me .


Really, the toughest part in the whole process is determining when the lifter for the valve you are checking is actually on the heel of the cam lobe and not starting to ride up the opening ramp or off the closing ramp, which would give you a false lash reading. But there’s a great trick to always make sure you are checking lash at the exact right time in the engine’s cycle, and that’s called the “EOIC” method.

EOIC stands for Exhaust Opening, Intake Closing. In other words, when working with a pair of valves for one cylinder (one intake and one exhaust) you can know when the valve is on the base circle of the cam by the action of its mate. When the exhaust valve is opening, you know that the intake valve will always be closed. And likewise, when the intake valve is closing, you know that the exhaust valve will always be closed. This is true no matter the number of cylinders or the cam’s specs, including lobe duration and separation. Heck, it even works with those overly complex overhead cam engines your Blue Oval friends and import fanatics spend their time with.