Sealed Power WH851CP Engine Piston

Sealed Power WH851CP Engine Piston Overview

Sealed Power WH851CP is a standard-size hypereutectic engine piston built for precise cylinder fitment and consistent combustion chamber geometry. It features a recessed head design, DUROSHIELD skirt coating, and a 0.8005-inch pin diameter for applications that demand accurate dimensions and stable operation.

Compatible With 1998-2003 Chevrolet S10, 1998-2003 GMC Sonoma, 1998-2002 Chevrolet Cavalier, and 1998-2002 Pontiac Sunfire applications, this piston is specified for engines using a 3.5039-inch bore and 1.200-inch compression distance. The WH851CP part number is a direct reference for buyers matching OE-style piston dimensions and ring groove layout.

Key Features

• Standard-size engine piston for select GM and compact car applications
• Hypereutectic alloy construction for dimensional stability
• DUROSHIELD skirt coating for reduced skirt wear
• Recessed head design with .065-inch deep x 2.650-inch diameter recess
• 0.8005-inch piston pin diameter with 0.02-inch pin offset
• Three-ring groove layout with 1.50 mm, 1.50 mm, and 3.00 mm widths
• Sealed Power WH851CP identification for accurate ordering

Detailed Product Description

The Sealed Power WH851CP piston is engineered around a 89.000 mm bore and standard-size dimensions, making it a precise replacement choice for engines that require the listed compression distance, pin size, and recessed crown profile. Its hypereutectic material helps maintain piston shape under operating heat, while the skirt coating adds a wear-resistant surface where piston-to-cylinder contact is most critical. For shoppers searching for a 1998-2003 Chevrolet S10 piston, 1998-2003 GMC Sonoma piston, 1998-2002 Chevrolet Cavalier piston, or 1998-2002 Pontiac Sunfire piston, WH851CP provides a clear specification match.

Sealed Power designs its engine components with modern manufacturing controls and materials selection to meet demanding engine service requirements. This piston cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Repair Uses

• Restoring compression loss caused by worn piston rings or piston wear
• Replacing a damaged or scored piston during engine rebuild work
• Correcting piston-to-bore fit issues in standard-size applications
• Addressing skirt wear in high-mileage 2.2L and related engine service
• Supporting rebuilds that require the specified recessed-head piston design

Installation Notes and Tips

Verify bore size, compression distance, pin diameter, and ring groove widths before assembly. Minimum clearance is listed on the piston fitting information on the carton label, so confirm that measurement during engine preparation. Match the piston to the correct cylinder and ring package specifications, and inspect the cylinder wall condition, connecting rod fit, and ring end gaps during installation.

Quality Assurance

Sealed Power parts are manufactured using ISO- and QS-certified processes and are built with current material and design standards for engine service. The WH851CP is a standard-size piston intended for accurate fitment and dependable rebuild results when the listed vehicle and engine specifications are confirmed.