Lycoming 71481 Cylinder Base Packing Ring is a replacement sealing ring designed for installation between the cylinder barrel and crankcase on compatible Lycoming aircraft piston engines. This packing ring provides a reliable seal at the cylinder base joint, helping prevent engine oil leakage and maintain proper crankcase sealing integrity.

The cylinder base packing ring is an important component of the engine cylinder installation, creating a controlled sealing surface between the cylinder flange and crankcase. Proper sealing helps retain engine oil, prevent contamination entry, and maintain the structural integrity of the cylinder-to-crankcase connection during engine operation.

Manufactured to Lycoming specifications, the 71481 packing ring is designed to withstand exposure to engine oil, elevated temperatures, vibration, and the mechanical stresses generated by aircraft piston engines. Its precision dimensions ensure proper compression and fit when installed according to approved maintenance procedures.

The cylinder base packing ring should be replaced whenever a cylinder is removed, during engine maintenance, or as part of overhaul procedures. Installing a new packing ring helps restore proper sealing performance and supports reliable engine operation.

Key Features

- Part Number: 71481
- Manufacturer: Lycoming Engines
- Component: Cylinder Base Packing Ring
- Provides sealing between the cylinder base and engine crankcase
- Helps prevent engine oil leakage and maintain crankcase integrity
- Precision-manufactured for correct fit and sealing performance
- Resistant to engine oil, heat, vibration, and operating stresses
- Suitable for compatible Lycoming aircraft engines