In this video I show the highlights of performing an overhead or valve adjustment on a Cummins ISL 8.9 liter engine in our 2003 Monaco Dynasty on the Roadmaster chassis.

Our coach also came equipped with the Jacobs Compression Brake so the removal, reinstallation and clearances are also shown for the CBrake.

This engine is the CM554 series of engine within the ISL family of engines. The parts used are as follows:

Rocker Cover gasket (Center fasteners); Cummins part # 3965548
Center bolts with rubber grommets; Cummins part # 3990876