ACDelco Engine Piston Pin Retainer

The ACDelco Engine Piston Pin Retainer (also called a piston wrist pin retainer, wrist pin lock or piston pin clip) holds the piston pin in place inside the piston. It keeps the pin from shifting sideways in the piston bore during engine operation, which helps protect the piston and cylinder wall.

Key Features:

• Retains the piston pin (wrist pin) securely in the piston pin bore
• Helps prevent pin movement that can score cylinder walls
• Designed for the demands of continuous engine operation
• Backed by the ACDelco brand, a long-standing name in OE-quality replacement parts

Replacing piston pin retainers during an engine rebuild or piston service is standard practice. Fresh retainers help ensure the piston pin stays properly secured in the assembled engine.