Piston Ring Set Cummins Engine ISL 8.9 / 9, ISLe 8.9 – Engine QSL 8.9 / 9, QSLe 8.9
Used on Cummins engines in the ISL/QSL family and in 8.3–9 L applications. Located in the piston. Its function is to seal against combustion pressure, control lubricating oil, and transfer heat from the piston to the cylinder wall. Made of special steel/cast iron for piston rings.
Engines: Cummins ISL9, ISL/ISLe, QSL/QSL9; 6C8.3/GTA8.3 in some applications.
When purchasing a replacement engine, I recommend checking the ESN and CPL, because Cummins may use different piston/piston ring configurations within the same ISL/QSL family.
It connects the piston to the connecting rod. It allows the piston and connecting rod to move relative to each other and transfers the combustion force to the connecting rod.
Confirmed applications: Cummins ISC, QSC, ISL, QSL; it is also documented for engines in the 6L/6LT family.
To ensure exact compatibility, I still recommend checking via ESN/CPL, because not all configurations use the same connector.