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The Cummins ISX VGT turbocharger is an impressive piece of engineering. By using a Variable Geometry Turbocharger (VGT), Cummins was able to improve engine performance, emissions, and drivability across a wide range of operating conditions. Unfortunately, one component of the VGT system has developed a reputation for being both expensive and prone to failure: the electronic actuator. Over the years, we've seen countless discussions about failed actuators, fault codes, and exp

The Cummins ISX has earned a reputation as one of the most popular heavy-duty diesel engines on the road. When properly maintained, these engines are capable of delivering hundreds of thousands of miles of reliable service. However, many owners, fleets, and engine rebuilders have encountered recurring issues involving liner movement, liner fretting, and head gasket failures. Understanding how these problems develop can help prevent costly repairs and improve engine longevity.