Checking valve lift with hydraulic lifters | The
WEBJun 9, 2010 · from Latrobe, PA (Mister Rogers' neighborhood) The MOST accurate way is to pull the intake and check lifter rise off the edge of the lifter. If you trust the rocker ratio, multiply the lifter rise by that ratio. If the engine has Rhodes type lifters in it, they will bleed down like that with low (no) oil pressure.