13283 - Service Update. An analysis of engine build data revealed that there could be a durability issue with the engines originally installed in these vehicles. To ensure the highest quality and best ownership experience for our customers, these engines need to be replaced prior to vehicle delivery.This bulletin provides a service procedure to replace the engine assembly on certain vehicles equipped with 4 cylinder engine (RPO LCV or LKW). Due to a casting error, these vehicles may have engine pistons that are dimensionally incorrect. Over time, contact between the cylinder valves and the piston could result in engine noise, rough running and/or bent valves.
