Abstract: A method of constructing a speed target on a camshaft in a combustion engine is disclosed. In applying the method a multiple number of ring segments are positioned around a portion of the camshaft. The multiple number of ring segments form a closed ring having a variable outer magnetic surface for reading by a speed sensor. Further, the multiple number of ring segments are secured in a radial direction and in a circumferential direction with respect to the camshaft.

Abstract: Disclosed is a push rod retainer for retaining an extremity of a push rod and a first end of a rocker arm in proximity of each other, comprising a base section accommodating at least a part of a junction space wherein the extremity of the push rod and a connection member of the rocker arm are joinable; and at least two resilient projections extending from the base section and at least partly in a direction towards each other, said resilient projections bounding a first entrance to the junction space. Also disclosed is a rocker arm having a connection member that is provided with a circumferential constriction configured for engagement by the resilient projections of the disclosed push rod retainer, and a method of retaining together a push rod and a rocker arm.