4089430
Engine Piston Kit
Cummins®

The engine piston kit (part number 4089430) is a set of components that work together to create the power needed to drive a truck. The kit includes the piston itself, as well as piston rings, wrist pins, and circlips. The piston is a cylindrical component that fits inside the engine cylinder and moves up and down during operation. It is responsible for compressing the fuel mixture in the cylinder before ignition and converting combustion energy into mechanical energy to turn the crankshaft. The rings help seal the gap between the piston and cylinder wall, while also transferring heat away from the piston head. Wrist pins connect the piston to connecting rods, which then transfer power to the crankshaft. Circlips help keep all these components securely in place within their respective housings. A properly functioning engine piston kit can significantly improve engine performance and efficiency by ensuring optimal compression ratios, minimizing frictional losses, and reducing wear on other engine parts over time.