According to Cummins, there was a production of rocker arms that prevented proper oil flow, starving the components. This is not because of an issue with the camshaft itself, but with the rocker arms. In short, an ISX camshaft can flatten out. We discussed this briefly in Cummins ISX Engine Spotlight. The ISX also has a history of camshaft issues. This kind of problem is more common on older style EGR systems, as many newer ones have tried to address and fix the issue. Similarly, there might be a white residue left behind from the burnt coolant. If you notice that it's using a larger amount of coolant than normal, it's probably worth investigating further. This is a difficult problem to diagnose, but monitoring the coolant consumption can help. On the ISX, it most likely has to do with a leak in the EGR valve. Like any other engine with an EGR, the system can cause some problems. EGR IssuesĪs we mentioned, the EGR system was a newer addition to the ISX. The 3 Most Common Cummins ISX Problems and Failures 1. Here we discuss some of the problems you might run into with your ISX. Some of these issues depend on which version of the ISX you're running-obviously if you're running a pre-2002 ISX without an EGR then you won't be experiencing issues with the EGR. Throughout its production history, Cummins has made various changes to the engine in order to keep up with the increasing restrictions, changing from a dual-cam to a single-cam and adding a cooled EGR system to reduce NOx emissions.ĭespite its popularity, it does have its problems, like any other engine.
It soon replaced the N14, the other workhorse engine produced by Cummins. The first ISX was produced in 1998, as a response to the EPA's tighter emissions restrictions. The ISX diesel engine by Cummins is one of the most popular engines on the road today.
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