Lycoming LW-16475 Upper Exhaust Valve Spring Seat is a precision-engineered engine component designed to support and properly locate the exhaust valve spring within compatible Lycoming aircraft engines. Installed at the upper end of the exhaust valve spring assembly, the spring seat provides a stable contact surface that ensures correct spring alignment and consistent valve train operation.

The upper valve spring seat distributes spring loads evenly across the retainer assembly while helping maintain proper valve motion throughout the engine operating range. Accurate positioning of the spring is essential for reliable valve seating, efficient combustion, and long-term durability of the valve train components.

Manufactured to meet Lycoming dimensional and material specifications, the LW-16475 is designed to withstand the high temperatures, cyclic loads, and vibration associated with aircraft piston engine operation. Its precision-machined construction contributes to dependable performance during continuous engine service.

This component is commonly replaced during cylinder overhaul, valve train maintenance, or major engine overhaul whenever inspection indicates wear, deformation, or damage. Installation should be performed in accordance with the applicable Lycoming maintenance manuals and approved overhaul procedures.

Key Features

- Part Number: LW-16475
- Manufacturer: Lycoming Engines
- Component: Upper Exhaust Valve Spring Seat
- Supports and aligns the exhaust valve spring
- Precision-machined for accurate fit and load distribution
- Designed for high-temperature aircraft engine operation
- Suitable for compatible Lycoming aircraft engines
- Common replacement item during cylinder and engine overhaul procedures