Cummins
Piston for Cummins 6CT
This piston is designed for the Cummins 6CT diesel engine. It manages the conversion of combustion energy into mechanical motion within the cylinder assembly.
Compatible models
Specifications
- Part number
- 3929161
- Brand
- Cummins
The piston 3929161 serves as a primary moving component within the Cummins 6CT diesel engine. It operates by reciprocating within the cylinder bore to convert the energy generated from the combustion process into mechanical force, which is then transferred to the connecting rod and crankshaft assembly. The component features specific grooves designed to accommodate piston rings, which maintain a seal between the combustion chamber and the crankcase while regulating oil consumption across the cylinder wall.
This component is engineered specifically for fitment in the Cummins 6CT engine model. It is manufactured to meet the dimensional and functional requirements of this engine series to ensure proper compression ratios and combustion efficiency. The design accounts for the thermal and mechanical stresses encountered during standard engine operation.
In internal combustion engines, the piston acts as a movable boundary for the combustion chamber. It must withstand the rapid pressure changes and high temperatures associated with the power stroke. By maintaining a precise fit within the cylinder liner, the piston ensures that the expanding gases effectively drive the engine cycle, which is fundamental to the power output and operational efficiency of heavy machinery and industrial equipment.

