Lycoming 17B23935 Exhaust Valve is a precision-engineered engine valve component designed for use in compatible Lycoming aircraft piston engines. This exhaust valve controls the release of combustion gases from the cylinder during the exhaust stroke, playing a critical role in engine breathing, combustion efficiency, and overall performance.

The exhaust valve operates under some of the most demanding conditions inside the engine, being exposed to high combustion temperatures, pressure pulses, and repeated opening and closing cycles. Proper valve sealing and operation are essential for maintaining cylinder compression, efficient exhaust flow, and reliable engine performance.

The 17B23935 exhaust valve is an alternative replacement for LW-16740 and is manufactured to meet Lycoming specifications for aircraft engine applications. Its design provides the durability required to withstand thermal stress, mechanical loading, and continuous operation in the combustion environment.

The exhaust valve should be inspected during cylinder maintenance and engine overhaul procedures for signs of burning, erosion, cracking, deformation, or improper sealing. Replacement of worn or damaged valves helps restore cylinder performance and supports continued engine reliability and airworthiness.

Key Features

- Part Number: 17B23935
- Manufacturer: Lycoming Engines
- Component: Exhaust Valve
- Alternative To: LW-16740
- Controls exhaust gas flow from the engine combustion chamber
- Maintains proper cylinder sealing and compression
- Designed to withstand high temperatures, pressure, and cyclic valve loads
- Precision-manufactured for reliable valve train operation
- Suitable for compatible Lycoming aircraft engines