Patent ID: 7293540

Claim:
A process for manufacturing a valve operating assembly, comprising the steps of: a) cold forming, at least in part, a socket comprising the steps of: i) providing a first rod; ii) cold forming, at least in part, a first socket surface into the first rod so that the first socket surface includes a push rod cooperating surface; iii) cold forming, at least in part, a second socket surface into the first rod so that the second socket surface includes a passage that fluidly links the second socket surface to an outer socket surface and a generally flat surface that is annular in shape and generally concentric relative to the outer socket surface; b) cold forming, at least in part, a leakdown plunger, comprising the steps of: i) providing a second rod; ii) cold forming, at least in part, a first plunger opening into the second rod so that the first plunger opening is provided with an annular plunger surface that defines a plunger hole shaped to accommodate a generally spherical member; iii) cold forming, at least in part, a second plunger opening into the second rod; c) machining, at least in part, the second rod to provide an outer plunger surface that includes an undercut plunger surface; d) providing a valve lifter body that includes a valve lifter axis, comprising the steps of: i) providing a third rod; and ii) machining, at least in part, the third rod to provide an inner lifter surface that includes a lifter well and a plurality of generally cylindrical surfaces.