STUD-536727 – Continental E-225 Cylinder Stud Assembly
Available now on the Airparts.aero Marketplace.
Overview
The Continental 536727 is a genuine OEM, flight-critical cylinder hold-down stud, engineered specifically for the legendary Continental E-185 and E-225 series of aircraft engines. This is not a simple threaded rod; it is a high-strength, precision-manufactured structural fastener whose sole purpose is to securely clamp the cylinder assembly to the engine crankcase. Fabricated from a high-tensile strength, heat-treated steel alloy, the 536727 is designed to withstand the immense combustion pressures and thermal stresses of engine operation, ensuring the structural integrity of the entire powerplant.
Key Features
- Primary Structural Fastener: The cylinder stud is a primary structural component of the engine. It is responsible for maintaining the critical clamping force (preload) that seals the combustion chamber and transfers the operational loads between the cylinder and the crankcase.
- High-Tensile Steel Alloy: Forged and machined from a premium, high-strength steel alloy and then heat-treated to achieve exceptional tensile strength and resistance to stretching (creep) and fatigue.
- Dual-Thread Design: Features a coarse thread on one end for secure installation into the aluminum crankcase, and a fine thread on the other end to provide greater precision and holding power for the cylinder hold-down nut.
- Precision Centerless Ground Shank: The unthreaded center portion (shank) of the stud is precision ground to a specific diameter, ensuring a perfect, locating fit within the cylinder base flange.
- Genuine Continental OEM Part: As a genuine factory component, it guarantees conformance to the stringent material specifications, heat treatment processes, and quality control standards required for this flight-critical application.
Technical Specifications
- Part Number: 536727
- Component Type: Cylinder Hold-Down Stud
- Material: High-Tensile, Heat-Treated Steel Alloy
- Finish: Typically a protective black oxide or phosphate coating.
- Thread Specifications:
- Case End: Coarse Thread (e.g., UNC)
- Nut End: Fine Thread (e.g., UNF)
- Primary Function: Clamps the cylinder assembly to the engine crankcase.
- Certification: FAA Production Approval
*** PLEASE NOTE - OVERHAULED CYLINDERS WILL COME WITH EITHER AN 8130 IF OVERHAULED IN A 145 REPAIR STATION OR FOR CYLINDERS OVERHAULED BY SKYLINE CYLINDER, THEY WILL COME WITH A SERVICEABLE TAG AS SKYLINE IS NOT AN FAA 145 REPAIR STATION BUT ONE OF THE BEST SHOPS IN THE COUNTRY FOR OVERHAULING CYLINDERS. PLEASE ASK FOR CLARIFICATION IF YOU ARE A COMMERCIAL OPERATOR AND NEED 8130 TAGS. ***
Aircraft Compatibility
The 536727 is the specified OEM cylinder stud for the classic and powerful Continental E-series "Big Bore" engines, which are the heart of many iconic Beechcraft Bonanza and Navion aircraft.
- Primary Engine Models:
- Continental E-185
- Continental E-225
- Common Aircraft Platforms:
- Beechcraft Bonanza: Models 35, A35, B35, C35, D35, E35, F35, G35
- Ryan Navion (with E-series engine conversions)
Applications
The 536727 is an essential component for engine overhaul and cylinder maintenance:
- Engine Overhaul: A mandatory inspection item during any engine overhaul. Studs are checked for corrosion, thread damage, and stretching ("necking") and are typically replaced as a complete set to ensure uniform clamping force.
- Cylinder Replacement: New studs are often installed when replacing a cylinder to ensure a fresh, reliable foundation for the new assembly.
Why Choose 536727?
The clamping force provided by the cylinder studs is what contains the thousands of PSI of combustion pressure generated with every power stroke. The failure of a cylinder stud can lead to a massive oil leak, a loss of compression, and catastrophic engine failure. Using a genuine Continental 536727 OEM stud is the only way to ensure the fastener has the certified material strength and fatigue resistance required for this extreme application. For a component this fundamental to engine integrity, there is no substitute.
Order Your 536727 Cylinder Studs Now
Build your classic Continental engine with the unmatched quality and safety of genuine OEM hardware. Visit Airparts.aero to inquire about new or serviceable 536727 cylinder studs today.
The 536727 cylinder stud is a tension fastener designed to be elastically stretched upon installation. When the cylinder hold-down nut is tightened to the specified torque value, the stud is placed under a precise amount of tension, creating a powerful clamping force. This preload must be greater than the separating force created by the peak combustion pressure, ensuring the cylinder and crankcase mating surfaces never separate. The dual-thread design is a key engineering feature: the coarse thread provides a robust, strip-resistant anchor in the relatively soft aluminum crankcase, while the fine thread on the nut end allows for more precise control of the applied torque and a higher resistance to loosening from vibration.
Note: This is a flight-critical engine component. Installation must be performed by a certified A&P mechanic or at a qualified engine overhaul facility in strict accordance with the current Continental Motors Overhaul Manual. Studs must be installed to the correct depth in the case, and nuts must be tightened in the specified sequence using a calibrated torque wrench.