05K21104 – Lycoming™ Genuine OEM Cylinder Power Assembly Kit
Available now on the Airparts.aero Marketplace.
Overview
The Lycoming 05K21104 is a genuine Original Equipment Manufacturer (OEM) cylinder power assembly kit, providing a complete, factory-matched solution for replacing a cylinder on parallel-valve Lycoming 360-series engines. This is not just a cylinder; it is a comprehensive kit containing all the primary components required to restore the power-producing capability of one cylinder to zero-time, factory-new condition. Featuring a nitrided steel barrel for exceptional durability and including a matched piston, ring set, and all necessary gaskets, this kit is the gold standard for performing a proper top overhaul or cylinder replacement.
Key Features
- Nitrided Steel Barrel: The cylinder barrel undergoes a nitriding process, a specialized case-hardening heat treatment. This creates an extremely hard, wear-resistant surface that provides superior protection against corrosion and ensures a longer service life with reduced oil consumption.
- Complete & Matched Assembly: This kit includes a brand-new cylinder assembly (with valves, guides, seats, springs, and retainers pre-installed), a perfectly matched piston with piston pin and plugs, and a complete set of piston rings. This factory matching ensures optimal compression, heat transfer, and oil control.
- All-Inclusive Gasket Set: Comes complete with all the necessary gaskets and seals for the installation of one cylinder, including the cylinder base O-ring, rocker cover gasket, intake sleeve and gasket, and exhaust gasket. This eliminates the hassle of ordering multiple small parts.
- Genuine Lycoming OEM Part: As a genuine factory kit, every component is guaranteed to meet the stringent material, manufacturing, and quality control standards of Lycoming's FAA Production Certificate. This is the only way to ensure the part conforms to the engine's original Type Certificate.
- Ready for Installation: The kit is delivered ready for a certified mechanic to perform the final piston ring gapping and assembly, significantly reducing the labor and complexity compared to overhauling an old cylinder.
Technical Specifications
- Part Number: 05K21104
- Component Type: Cylinder Power Assembly Kit
- Cylinder Barrel Type: Nitrided Steel
- Valve Configuration: Parallel Valve
- Kit Contents:
- 1x Complete Cylinder Assembly (Valves, Guides, Seats, Springs Installed)
- 1x Piston
- 1x Piston Pin & Plugs
- 1x Piston Ring Set (Compression and Oil Control Rings)
- 1x Gasket Kit (for one cylinder)
- Certification: FAA Production Approval
Aircraft Compatibility
The 05K21104 kit is the specified replacement for a wide range of Lycoming's most popular and prolific 360-cubic-inch, parallel-valve engines. It is imperative to consult the specific engine's Illustrated Parts Catalog (IPC) to verify the correct kit for your engine model and compression ratio.
- Common Engine Series:
- O-360 (A, C, J series)
- IO-360 (B, C, L, M series)
- AEIO-360 (B, H series)
- Common Aircraft Platforms:
- Piper Archer, Cherokee 180
- Cessna 172 (some models)
- Grumman Tiger
- Mooney M20
- Numerous experimental and aerobatic aircraft.
Applications
The 05K21104 kit is the premier solution for critical engine maintenance:
- Top Overhaul: The ideal choice when low compression, high oil consumption, or internal corrosion necessitates the replacement of one or more cylinders.
- Engine Overhaul: The foundation of a "new limits" engine overhaul, ensuring all power-producing components are brand new.
- Upgrade from Chrome Cylinders: A superior, factory-approved replacement for older-style channeled or chrome-plated cylinders.
Why Choose 05K21104?
The health of an engine is determined by the integrity of its cylinders. Using a complete, factory-matched Lycoming kit like the 05K21104 is the single best way to guarantee performance and reliability. It eliminates the variables and potential compatibility issues of using overhauled cylinders or sourcing individual parts. The nitrided barrel provides a significant durability advantage over older cylinder types, ensuring better long-term value and engine performance. For a component this central to the function and safety of your aircraft, there is no substitute for a genuine Lycoming factory-new kit.
Order Your 05K21104 Cylinder Kit Now
Restore the power, efficiency, and reliability of your engine with a genuine, factory-new cylinder kit from Lycoming. Visit Airparts.aero to order your 05K21104 power assembly kits today.
The nitriding process applied to the Lycoming 05K21104 cylinder barrel is a thermochemical case-hardening process. The steel barrel is heated in a specialized atmosphere containing nitrogen. Nitrogen atoms diffuse into the surface of the steel, forming hard, stable nitride compounds. This creates a "case" on the surface that is significantly harder (often exceeding 65 HRC) than the base steel, providing an exceptionally wear-resistant surface for the piston rings. Unlike chrome plating, nitriding is a diffusion process, not a coating, so it will not flake, peel, or chip. This results in a much faster and more effective break-in period, superior oil retention due to the microscopic porosity of the surface, and a dramatic increase in the cylinder's service life, especially in preventing corrosion pitting.
Note: This is a flight-critical engine component. Installation must be performed by a certified A&P mechanic in strict accordance with the current Lycoming Overhaul Manual and relevant Service Instructions. Proper break-in procedures must be followed after installation to ensure correct seating of the new piston rings.
- IO-360-A
- TSIO-360-A
Related Documents:
Mandatory SB: [ Click here ]
Repair Information SB: [ Click here ]
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