276 PDF

A service bulletin that addresses the issue of a rattling noise occurring after engine start in specific engine models. It identifies the secondary timing chains as the cause due to insufficient oil pressure and provides a remedy involving the installation of non-return valves and replacement of chain tensioners. Detailed instructions on parts required, including part numbers and engine numbers, are provided to ensure proper installation. This document is intended for use by service personnel in repairing and preventing further occurrences of the noise.