Piston Rings – Volvo (31330721)

Piston Rings is one of the pistons that converts combustion pressure into motion. Ring land dimensions and skirt coating are specific to the build, not to the displacement.

Replace the Piston Rings during any rebuild that has the head off, and always when the bore shows vertical scoring. Piston-to-wall clearance is set by measurement, not by the part number alone.

Reference number for the Piston Rings: 31330721. It is filed under Pistons, Rings & Cylinders, and it is the number that has to match the part coming off the vehicle.

Genuine VOLVO supplied for this Piston Rings, with the engineering number unchanged from the factory reference stamped on the original.