Abstract: An improved cam follower includes a lifter body, a spring seat, a tower, a spring and an anti-rotation member defining at least one interference rib. The lifter body may engage with a cam via a rolling member. The lifter body defines a longitudinal axis, a first open end, and a second end. The spring seat which defines a spring seat opening may be disposed at the first open end of the lifter body. The tower which includes an upper flange may be couples a pushrod to the lifter body. The spring may be disposed between the spring seat and the upper flange of the tower. The anti-rotation member may be disposed proximate to the first open end of the lifter body and includes an outer surface and an inner surface with an interference rib integral to the inner surface which engages with an upper region of the lifter body.

Abstract: A lifter guide includes a lifter guide body having an outer surface and an inner surface that extend from a first end to a second end. The inner surface defines at least one push rod passage. A plurality of compression members are provided at the first end. The plurality of compression members project proudly from the first end. The plurality of compression members are configured and disposed to be compressed by a cylinder head to retain the lifter guide in a cylinder block. The lifter guide is devoid of mechanical fasteners.

Abstract: A lifter guide includes a lifter guide body having an outer surface and an inner surface that extend from a first end to a second end. The inner surface defines at least one push rod passage. A plurality of compression members are provided at the first end. The plurality of compression members project proudly from the first end. The plurality of compression members are configured and disposed to be compressed by a cylinder head to retain the lifter guide in a cylinder block. The lifter guide is devoid of mechanical fasteners.