656671A1 – Continental Motors OEM Crankcase and Bearing Kit
Available now on the Airparts.aero Marketplace.
Overview
The Continental Motors 656671A1 is a genuine OEM, factory-new crankcase and bearing kit for the IO-550-N series engine, famously used on the Cirrus SR22. This kit represents the foundational building block for a professional engine overhaul or repair. It includes a brand new, matched set of left and right crankcase halves, along with the corresponding factory-installed main bearings and other essential hardware. Manufactured from high-strength cast aluminum alloy and precision-machined to exacting tolerances, this crankcase assembly provides the structural integrity required to contain the immense forces of combustion and support the entire rotating assembly.
Key Features
- Factory-New Matched Set: Includes brand-new, never-installed left and right crankcase halves that have been machined as a perfectly matched set, ensuring perfect alignment of the crankshaft and camshaft bores.
- Pre-Installed Main Bearings: Comes from the factory with the main bearing shells already installed (line-bored) in the crankcase bores. This eliminates the need for complex and specialized machining by the engine builder, guaranteeing correct alignment and oil clearances.
- Heavy-Duty Design: Specifically engineered for the demanding IO-550-N application, featuring robust webbing and structural reinforcements in high-stress areas to ensure durability and a long service life.
- Genuine OEM Kit: This is not an aftermarket component but a genuine Continental Motors kit. It guarantees that all materials, heat-treating processes, and dimensional tolerances meet the original, FAA-approved Type Certificate Data Sheet (TCDS) for the engine.
- Comprehensive Kit Components: The "A1" designation signifies a kit that typically includes the crankcase halves, installed main bearings, the crankshaft nose seal, and associated hardware, providing a complete foundation for the engine build.
Technical Specifications
- Part Number: 656671A1
- Component Type: Crankcase & Bearing Assembly Kit
- Material: High-Strength Cast Aluminum Alloy
- Main Bearing Bores: Factory line-bored for precision alignment
- Included Bearings: Full set of standard main bearing shells, pre-installed
- Primary Engine Application: IO-550-N
- Certification: FAA Production Approval
Engine Compatibility
The Continental 656671A1 kit is specifically designed as the crankcase assembly for the IO-550-N engine. While some components may be similar to other 550-series engines, this specific part number is tied to the IO-550-N configuration.
- Primary Aircraft Application:
- Cirrus SR22
- Engine Model:
- IO-550-N
Applications
The 656671A1 kit is the ultimate solution for specific, high-stakes engine maintenance scenarios:
- Major Engine Overhaul: The ideal foundation for a "new limits" engine overhaul, ensuring the core of the engine is a zero-time, factory-perfect component.
- Crankcase Replacement: Used to replace an original crankcase that has been deemed unserviceable due to cracking, fretting, corrosion, or damage from a catastrophic component failure.
Why Choose 656671A1?
The crankcase is the literal backbone of a piston engine. Its dimensional accuracy dictates the alignment and, therefore, the service life of every major rotating component. Choosing a factory-new Continental 656671A1 kit eliminates all the uncertainties and potential hidden flaws of a repaired or overhauled case. It guarantees perfect bore alignment, correct material strength, and the peace of mind that comes from building an engine on a flawless foundation. For an engine as sophisticated as the IO-550-N, starting with a new OEM crankcase and bearing kit is the most reliable path to achieving factory-new performance, smoothness, and durability.
Order Your 656671A1 Crankcase Kit Now
Build your Continental IO-550-N engine on the ultimate foundation. Visit Airparts.aero to order a genuine, factory-new 656671A1 Crankcase and Bearing Kit today.
The Continental 656671A1 crankcase is the primary structural member of the engine, providing the mounting points for the cylinders, accessories, and the engine mounts themselves. Internally, the most critical feature is the line-bored main bearing journals. These bores are machined in a single operation with both case halves torqued together, creating a perfectly round and concentric tunnel for the crankshaft. This precision is essential for establishing the correct main bearing oil clearances, which are responsible for creating the hydrodynamic wedge that supports the crankshaft. By providing the case with pre-installed bearings, Continental ensures that this critical geometric relationship between the case and bearings is set perfectly at the factory, removing the most difficult variable from the field engine assembly process.
Note: This is a major engine component assembly. All assembly and installation procedures must be performed by a certified A&P mechanic or a certified engine overhaul facility in strict accordance with the current Continental Motors Overhaul Manual for the IO-550-N engine. All associated parts must be inspected and measured to ensure they meet service limits before assembly.
Description: CRANKCASE & BRG KIT
Part Number: 656671A1
*** CORE DEPOSIT - $6,000.00
AirParts Rotable Crankcases are sold as an Exchange Only sales transaction. This means that you will purchase the crankcase and send us back your core crankcase. You will use the packaging that we provide to ship back your core. You will not be charged the core charge until after 15 days if you do not return your core to us. Once the core is returned, it will be inspected by a third-party crankcase 145 repair station to determine whether it is acceptable. In the unlikely event that your core fails inspection or is out of spec, you will be responsible for paying the core charge. If the core does not fail but requires additional processing outside of normal overhaul, you will be charged for those additional small charges. This is standard in the aviation industry when purchasing core exchange items. If the core is in good shape, purchasing core exchange from AirParts provides you with the crankcase you need right away without any wait. It also lowers the price of acquiring the rotable parts you need to get your job done quickly leading to a happy client!
