Abstract: A push rod gauge for finding the optimum length of push rods in a push rod engine. The gauge has a mounting bracket which is affixed to a cylinder head after the rocker arm has been removed, a push rod holding channel is held by the face plate and has measuring marks on its outer surface. A push rod member is placed in the conventional position of a push rod and the cam shaft is turned. The position at which the push rod moves an equal length above and below a zero line mark is noted. A push rod is then adjusted or cut to this preferred length. The device can be used on any engine having push rods.