Sealed Power WH345DCP Engine Piston

Sealed Power WH345DCP Engine Piston

The Sealed Power WH345DCP is a standard-size engine piston built for select Chevrolet, Pontiac, Cadillac, and GMC V8 applications. It features a 4.000-inch bore, 1.548-inch compression distance, flat top design with 4 valve reliefs, and a DUROSHIELD skirt coating for reduced skirt wear.

Key Features

• Standard-size piston with a 4.000-inch bore
• 1.548-inch compression distance for matched engine geometry
• Flat head with 4 reliefs for valve clearance
• Hypereutectic alloy construction for modern engine service
• DUROSHIELD skirt-coated piston surface
• Pin diameter: 0.927 inch; pin type F
• Ring groove widths: 5/64, 5/64, and 3/16 inch
• Minimum clearance: 0.0010 inch

Detailed Description

Sealed Power WH345DCP is engineered for engines that require a standard 4.000-inch piston with a flat crown and four valve reliefs. The negative 6.9 cc dome volume, 1.548-inch compression distance, and hypereutectic alloy construction make it a precise replacement choice for rebuilds that need consistent dimensions and stable fitment. The DUROSHIELD skirt coating adds a wear-resistant surface where piston-to-cylinder contact matters most.

This part cross-references 474190 and 3911020 for the same application. It is a strong fit for classic and late-model Chevrolet Camaro, Corvette, Caprice, Impala, Nova, and related V8 platforms, as well as Pontiac and GMC applications listed below. For buyers searching for a Sealed Power WH345DCP piston for 1967-1970 Chevrolet Camaro or a WH345DCP piston for 1984-1990 Chevrolet Corvette, the dimensional specs are the key match points.

What It Helps Address

• Worn or damaged piston crowns during engine rebuilds
• Excessive skirt wear in high-mileage engines
• Compression loss from piston wear or scoring
• Valve-to-piston clearance needs in 4-relief applications
• Standard-bore replacement requirements during overhaul

Installation Notes and Tips

Verify bore size, compression distance, pin diameter, and ring groove widths before assembly. This piston uses a 0.927-inch pin and requires the specified lock ring LR-63; lock ring is not included. Confirm minimum clearance and cylinder finish during machine work, and match ring selection to the listed groove widths. Body fitment includes 1967-1970 Chevrolet Camaro, 1984-1990 Chevrolet Corvette, and 1969-1970 Chevrolet Nova applications, along with other listed Chevrolet, Pontiac, Cadillac, and GMC models.

• Fits 1990 Cadillac Brougham, N/A
• Fits 1987-1990 Chevrolet Camaro, N/A
• Fits 1967-1970 Chevrolet Camaro, N/A
• Fits 1985-1990 Chevrolet Caprice, N/A
• Fits 1969-1970 Chevrolet Caprice, N/A
• Fits 1984-1990 Chevrolet Corvette, N/A
• Fits 1982 Chevrolet Corvette, N/A
• Fits 1987-1990 Pontiac Firebird, N/A
• Fits 1982-1985 Chevrolet Impala, N/A
• Fits 1969-1970 Chevrolet Impala, N/A
• Fits 1969-1970 Chevrolet Bel Air, N/A
• Fits 1969-1970 Chevrolet Blazer, N/A
• Fits 1969-1970 Chevrolet C10 Suburban, N/A
• Fits 1969-1970 Chevrolet C20 Suburban, N/A
• Fits 1969-1970 Chevrolet El Camino, N/A
• Fits 1969-1970 Chevrolet K10 Suburban, N/A
• Fits 1969-1970 Chevrolet K20 Suburban, N/A
• Fits 1970 Chevrolet Monte Carlo, N/A
• Fits 1969-1970 Chevrolet Nova, N/A
• Fits 1970 GMC G25/G2500 Van, N/A
• Fits 1970 GMC G35/G3500 Van, N/A
• Fits 1970 GMC Jimmy, N/A
• Fits 1968-1970 Pontiac Acadian, N/A
• Fits 1969-1970 Pontiac Laurentian, N/A
• Fits 1969-1970 Pontiac Parisienne, N/A

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. WH345DCP is built to those standards for rebuilders who need consistent dimensions and dependable machining quality.