Sealed Power E-459K Engine Piston Ring Set

Sealed Power E-459K Piston Ring Set

Sealed Power E-459K is a standard-size engine piston ring set for 4.0000-inch bore applications. It combines a steel top ring with moly face, a grey iron second ring, and a 3-piece flex vent oil ring design for precise sealing in compatible Chevrolet and GMC 4.0L-style rebuilds.

• Standard size piston ring set for 4.0000 bore diameter
• Top ring material: steel with moly face for wear resistance
• Top ring face design: barrel face
• Second ring material: grey iron with reverse torsional face design
• Oil ring design: 3-piece flex vent
• Ring groove widths: 5/64 x 5/64 x 3/16
• File fit: No
• Outside diameter: 4.0000 in

Application Details

This Sealed Power piston ring set E-459K is built around the listed 4.0000-inch bore and standard-size dimensions for engine rebuild work. It is listed for a wide range of Chevrolet and GMC trucks, vans, and SUVs, including 1988-1995 Chevrolet C1500, 1988-1995 Chevrolet C2500, 1985-1995 Chevrolet G10, 1985-1995 Chevrolet G20, 1985-1995 Chevrolet G30, 1988-1995 Chevrolet K1500, 1988-1995 Chevrolet K2500, 1990-1995 Chevrolet P30, 1988-1995 Chevrolet S10, 1988-1994 Chevrolet S10 Blazer, 1985-1994 Chevrolet Astro, and 1985-1990 Chevrolet Caprice. It also covers GMC and Pontiac applications such as 1985-1995 GMC G1500, 1985-1995 GMC G2500, 1985-1995 GMC G3500, 1988-1995 GMC K1500, 1988-1995 GMC K2500, 1991-1995 GMC Sonoma, and 1986-1987 Pontiac Grand Prix.

Sealed Power E-459K is also cross-referenced to 2M5712 and 459K for the same application.

What This Part Helps Address

• Low compression from worn or tired piston rings
• Excessive oil consumption caused by ring wear
• Blow-by that can reduce crankcase sealing
• Loss of cylinder sealing during engine rebuilds
• Uneven ring performance in standard-bore 4.0000-inch engines

Installation Notes and Tips

Verify bore diameter, ring groove widths, and piston compatibility before assembly. This set is not file fit, so ring end gaps should be checked against the engine builder’s specifications during installation. Confirm the application notes for deep oil ring groove requirements and any piston-specific callouts, such as the listed use with H640DCP piston on certain 1991 GMC Safari applications.

Quality Assurance

Sealed Power states that its parts use innovative designs, advanced materials, and ISO- and QS-certified manufacturing processes to meet the demands of modern engines. That manufacturing approach supports consistent fit and dependable rebuild results for compatible Chevrolet, GMC, and Pontiac engine applications.