Patent ID: 7856953

Claim:
A dual valve lifter assembly for an internal combustion engine comprising: a dual valve lifter and a guide for said dual valve lifter; said dual valve lifter comprising: an elongated outer housing, a cam follower mounted at one end of said outer housing, a first and second bore in said outer housing, said first and second bore each having an opening at the other end of said outer housing, a first and second flat adjacent said opening of said first bore, said first bore positioned between said first and second flat, a third and fourth flat adjacent said opening of said second bore, said second bore positioned between said first and second flats, a distance between said first and second flat different than a distance between said third and fourth flat, said first, second, third, and fourth flat each having a flat surface that define a plane and each plane of each flat being parallel to each other and parallel to a plane containing both axes of said first and second bore; said guide comprising a plate adapted to be affixed to an engine block, a first and second hole in said plate, said first hole concentric with said first bore and said second hole concentric with said second bore, a first and second ledge extending downward from said plate and adjacent said first hole, said first hole positioned between said first and second ledge, a third and fourth ledge extending down from said plate and adjacent said second hole, said second hole positioned between said third and fourth ledge, a distance between said first and second ledge different than a distance between said third and fourth ledge, said first, second, third, and fourth ledge each having a flat surface that define a plane and each plane of each ledge being parallel to each other and parallel to the plain containing both axes of said first and second bore; wherein said dual lifter is oriented and prevented from rotation by said guide because of the alignment of said first, second, third, and fourth flat with said corresponding first, second, third, and fourth respective ledge.