Rocker arm assembly and components therefor

A method of precision manufacture of an outer arm of a rocker arm assembly comprising the steps of:

• casting an outer arm of a rocker arm assembly, the cast outer arm comprising separate left and right side arms;
• clamping the outer arm via a clamping lobe on a bottom surface of each of the left and right side arms;
• and
• precision processing the outer arm while the outer arm is clamped via the clamping lobes,
• wherein the step of precision processing comprises forming a slider pad on a top surface of each of the left and right side arms and wherein clamping the outer arm via the clamping lobes reduces distortion of the outer arm caused by the precision processing.

A method of precision manufacture of an outer arm of a rocker arm assembly comprising the steps of:

• casting an outer arm of a rocker arm assembly, the cast outer arm comprising separate left and right side arms suitable for forming slider pads on a top surface of the left and right side arms;
• clamping the outer arm via a clamping lobe on a bottom surface of each of the left and right side arms, the clamping lobes located directly beneath areas suitable for forming slider pads on the left and right side arms;
• and
• grinding the outer arm while the outer arm is clamped via the clamping lobes, the grinding forming slider pads on the left and right side arms and wherein clamping the outer arm via the clamping lobes reduces distortion of the outer arm caused by the grinding.