The Surprise Inside Cummins ISX

By Steve Scott

Cracker Jack® and the Cummins® ISX engine have something in common – a surprise inside. Looking inside a Cummins ISX to see what surprises you may find could also be considered a treasure hunt… you may find several, or none.

Here is an overview of some of the updates, and a few safety measures that may catch you off guard when repairing or rebuilding Cummins ISX engines.

Cummins ISX engines have been around since the late ’90s and will continue to be produced and needing repairs for the foreseeable future. There have been multiple updates to these engines over the years. The earlier dual camshaft engines have been replaced by the later single camshaft designs.

This article summarizes the major changes with the following ISX engine components: pistons, liners, connecting rods and bearings, and camshaft (single vs. dual).