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The Schaeffler INA hydraulic lifter (420 0222 10) is a critical component within your engine's valvetrain system. Its primary function is to automatically adjust the clearance between the camshaft and the valves, compensating for thermal expansion and wear. By maintaining zero valve lash, hydraulic lifters ensure that the valves are fully closed when they should be, leading to optimal compression and efficient combustion. This precise operation contributes significantly to the overall performance, fuel economy, and quiet operation of your engine. Schaeffler INA is a recognized brand for engine components, and this hydraulic lifter is manufactured to meet stringent quality standards. Replacing worn or malfunctioning lifters with this part can help restore engine smoothness and prevent potential damage to other valvetrain components.