11 After tearing off the rockers, our faint contact patch was revealed. The patch is the rocker sweep on the tip of the valve through full articulation. Ideally, you want it to fall just above center because when the arm starts to push down on the valve it move forward just slightly. If yours is not in the proper position, you'll need different pushrods. Longer ones will move the patch towards the intake manifold while shorter will move it towards the headers.