How often should you change the crankcase filter on a Cummins ISX?
The crankcase filter should be replaced every 125,000 miles or you can install a maintenance free filter.
What causes crankcase pressure in a Cummins ISX?
The most common answer is the crankcase filter being clogged up, or a malfunctioning valve in the filter. The filter should be replaced every 125,000 miles or you can install a maintenance free filter. Other instances could be the crankcase pressure sensor is malfunctioning, but that would require a diagnostics computer and some troubleshooting.
