Description

The Cummins Aluminum Piston Assembly M-0187 (Standard Size) is a precision-engineered piston designed to deliver reliable performance, efficient combustion, and long service life in Cummins diesel engines . This piston assembly directly replaces Cummins OE part numbers 3802100 and 3802236 , ensuring OEM-accurate fitment, correct compression height, and proper piston-to-cylinder clearance. Constructed from high-strength aluminum alloy, this piston offers excellent heat dissipation, reduced reciprocating weight, and smooth engine operation. Aluminum pistons are ideal for applications where balanced thermal expansion, fuel efficiency, and responsive engine performance are required, especially in standard-duty and medium-duty diesel operations. The M-0187 piston assembly features precision-machined ring lands, an optimized skirt profile, and consistent weight balance to minimize friction and piston slap. The standard size (STD) configuration is intended for engines with cylinders within factory specifications, making it a perfect choice for in-frame overhauls and standard engine rebuilds without additional machining. This aluminum piston assembly is commonly used during engine rebuilds, preventive maintenance, and professional reconditioning projects . It is trusted by diesel technicians, fleet maintenance teams, and engine rebuilders seeking dependable OEM-style performance.