276 PDF

A service bulletin addressing a rattling noise occurring after engine start for several seconds, specifically for engines 276, 278, and 157. The document identifies the cause as issues with secondary timing chains and inadequate oil pressure during startup. It provides remedies including installing non-return valves and replacing left and right secondary chain tensioners. Detailed instructions are provided for installation and part replacement, ensuring proper fitment to avoid future issues. The bulletin also lists specific part numbers and descriptions with associated vehicle engine numbers and applies only to certain ranges.