Gm Global Technolgoy Operations, Inc.

Ralph L Clayson, Iii

Charles Michael Philo

A valve actuation assembly is disclosed for use on an internal combustion engine. The assembly includes a cam follower having a follower body. The follower body has an upper head portion and is configured to receive a pair of spaced rollers therein. The rollers are mounted on shafts in the follower body and extend outwardly from the head portion to engage corresponding spaced cam surfaces of a rotatable camshaft for actuating the valve lifter and, consequently, an associated engine valve. The head portion of the follower body cooperates with the inner sidewalls of the rollers to define a space therebetween for straddling a radially outwardly extending spacer mounted for rotation on the camshaft between the spaced cam surfaces. The side surfaces of the outwardly extending spacer are operable with corresponding sidewalls of the rollers to prevent rotation of the cam follower relative to the camshaft.

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Grand Rapids, MI, United States of America

Ralph L Clayson, Iii