Which component is placed in the cam gear dowel pin-hole?

• A. Polylock
• B. Feeler Gauge
• C. Rocker Arm
• D. Cam Bushing

Answer: (D)

The key idea is that the hole in the cam gear that receives the dowel pin is designed to hold a cam bushing. This bushing provides a smooth, wear-resistant surface and precise alignment between the cam gear and the camshaft. With the dowel pin locating the gear, the bushing keeps the gear’s inner bore concentric with the shaft, reducing wear, controlling clearance, and helping maintain correct timing. The other items don’t fit this role: a Polylock is a locknut for rocker arms, a Feeler Gauge is a measuring tool, and a Rocker Arm is a separate valve-actuating component. The cam bushing is the part meant to live in that hole.