Who Should Worry?
Those owners of a Cummins 24v ISB engine in a 1998-2001 model year vehicle. This does not only affect Dodge Rams. The 53 block was also used in medium duty trucks from different manufacturers, mobile homes, public school buses and mass transportation buses. Update: Recent information I have received from a 1998 12v owner says that some late 12v engines have “53” blocks. This owner knows because he HAS one. His truck has a build date of 11-97. He did say, however, that he has had no problems with his block, regularly pulling heavy trailers in the Rocky Mountains.
