Lower Engine Piston Compression Ring – GM (93744928)

Lower Engine Piston Compression Ring is a reciprocating component that seals the combustion chamber. Clearance and surface finish decide whether it seals correctly, so the bore has to be measured before a replacement is chosen.

Replace the Piston Compression Ring when a leak-down test shows air escaping past the rings, when the skirt is scuffed, or when ring lands are cracked. Check the ring end gap in the bore it will run in.

The Piston Compression Ring in this listing carries part number 93744928 and sits in the Pistons, Rings & Cylinders category. The number stamped on the original part is the only reliable cross-reference.

This is GM dealer-sourced stock rather than an equivalent, so the number on the Piston Compression Ring traces straight back to the manufacturer.

This is the lower unit in the assembly; confirm the location on your vehicle before ordering.