The rocker shaft support ring for the Citroen 11CV 11D is a crucial component that secures the rocker shaft in place, ensuring the engine runs smoothly. This ring stabilizes the shaft, allowing the engine’s moving parts to operate smoothly and efficiently. Proper maintenance and timely replacement of this ring are vital to prevent wear on the rocker shaft and adjacent components. A well-functioning support ring contributes to the motor's longevity and performance, essential for preserving classics like the Citroen 11CV 11D.