SA628488 – Superior Air Parts FAA-PMA Hydraulic Lifter Assembly
Available now on the Airparts.aero Marketplace.
Overview
The Superior Air Parts SA628488 is an FAA-PMA approved hydraulic valve lifter assembly, engineered as a direct replacement for Continental Motors OEM part number 658088. This lifter is a precision-manufactured component essential to the valve train of a wide range of Continental engines. Its primary function is to automatically maintain "zero lash" (zero clearance) in the valve train, ensuring quiet engine operation, significantly reducing wear on camshaft lobes and valve components, and optimizing engine power and efficiency. Manufactured using high-strength steel alloys and advanced machining techniques, the SA628488 provides a certified, reliable, and cost-effective alternative to the OEM part.
Key Features
- Precision-Ground Surfaces: The lifter body and internal hydraulic plunger are ground to exacting micron-level tolerances, ensuring smooth, consistent operation and proper hydraulic function within the engine block's lifter bores.
- High-Strength Steel Construction: Fabricated from premium, hardened steel alloys specifically chosen for their ability to withstand the extreme cyclic loads and contact stresses inherent in the engine's valve train.
- Optimized Hydraulic Metering: Features a finely calibrated hydraulic check valve and metering system that ensures the lifter remains "pumped up" with oil, providing reliable zero-lash performance from idle to full power and preventing valve float.
- Full FAA-PMA Certification: Holds a Parts Manufacturer Approval from the FAA, certifying that the part has met or exceeded the safety and quality standards of the original OEM component, making it a fully airworthy and legal replacement.
- Direct Replacement: Designed as a drop-in replacement for Continental P/N 658088, ensuring perfect form, fit, and function without any need for modification during installation.
Technical Specifications
- Part Number: SA628488
- OEM Replacement for: Continental P/N 658088
- Component Type: Hydraulic Valve Lifter / Tappet Assembly (Typically for Intake position)
- Function: Automatic zero-lash valve clearance maintenance
- Body Material: Hardened Steel Alloy
- Internal Components: Matched hydraulic plunger, spring, and check valve assembly
- Certification: FAA-PMA
Engine Compatibility
The Superior Air Parts SA628488 lifter is FAA-approved for installation on a vast range of Continental's most popular large-bore engines. It is imperative to consult the specific engine's Illustrated Parts Catalog (IPC) and maintenance manuals to confirm applicability.
- Compatible Engine Series:
- O-470
- IO-470, LIO-470
- IO-520, LIO-520, LTSIO-520
- TSIO-520, GTSIO-520
- IO-550, IOF-550
- TSIO-550, TSIOF-550, TSIOL-550
Applications
The SA628488 is a critical component for engine health and is primarily used in the following scenarios:
- Major Engine Overhaul: A mandatory replacement item during a complete engine overhaul to ensure the entire valve train is restored to zero-time condition and proper operating clearances.
- Camshaft & Lifter Replacement: Replaced as a complete set when addressing camshaft spalling or lifter face wear, a common maintenance issue in these engines.
- Performance Restoration: A key component in resolving issues like valve train noise ("clatter") and restoring smooth engine operation often caused by old, sticking, or collapsed lifters.
Why Choose SA628488?
Choosing the Superior Air Parts SA628488 provides an unparalleled combination of certified quality and economic value. With decades of experience in manufacturing FAA-PMA parts, Superior has a proven track record of producing components that meet or exceed the performance of the original. By installing the SA628488, you are ensuring your engine's valve train operates with quiet precision and reliability, backed by a fully-traceable, FAA-approved part, making it the smart choice for discerning aircraft owners and professional engine builders alike.
Order Your SA628488 Hydraulic Lifters Now
Ensure the smooth and reliable operation of your Continental engine with the certified quality of Superior Air Parts. Visit Airparts.aero to order your SA628488 hydraulic lifter assemblies today.
The SA628488 hydraulic valve lifter is a high-precision, self-adjusting cylinder that acts as the critical intermediary between the camshaft lobe and the pushrod. Its operation relies on engine oil pressure. Oil enters the lifter body through a small port, flows past a check valve, and fills a cavity beneath a small, internal piston (plunger). This action creates an incompressible column of oil that extends the lifter's effective length, eliminating all clearance in the valve train. As engine components heat up and expand, a precisely calibrated "leak down" rate allows a minuscule amount of oil to escape, permitting the lifter to adjust its length and maintain the zero-lash condition. This ingenious mechanism is crucial for reducing shock loading on the valve train, minimizing wear, and ensuring consistent valve timing for optimal engine performance.
Note: Installation of engine internal components must be performed by a certified A&P mechanic during engine overhaul or repair, in strict accordance with the engine manufacturer's service and overhaul manuals. It is industry best practice to replace all lifters as a matched set during an overhaul and to apply a specialized anti-wear assembly lube to the lifter face before installation.
Engine Configurations
GTSIO-520 -C, -D, -E, -F, -H, -K, -L, -M, -N IO-470 -A, -C, -D, -E, -F, -G, -H, -J, -K, -L, -LO, -M, -N, -P, -R, -S, -T, -U, -V, -VO
IO-520 -A, -B, -BA, -BB, -C, -CB, -D, -E, -F, -J, -K, -L, -M, -MB, -N, -NB, -P
IO-550 -A, -B, -C, -D, -E, -F, -G, -L, -N, -P, -R
IOF-550 -B, -C, -D, -E, -F, -L, -N, -P, -R
LIO-470 -A LIO-520 -P
LTSIO-520 -AE O-470 -A, -B, -BCI, -E, -G, -GCI, -H, -J, -K, -KCI, -L, -LCI, -M, -MCI, -N, -P, -R, -S, -T, -U
TSIO-470 -B, -C, -D
TSIO-520 -A, -AE, -AF, -B, -BB, -BE, -C, -CE, -D, -DB, -E, -EB, -G, -H, -J, -JB, -K, -KB, -L, -LB, -M, -N, -NB, -P, -R, -T, -U, -UB, -VB, -WB
TSIO-550 -A, -B, -C, -E, -G, -K
TSIOF-550 -D, -J, -K
TSIOL-550 -A, -B, -C
