The Mazda 626 Camshaft has been specifically engineered to synchronize every action of the valves, and this gives the engine the ability to breathe freely and provide reliable performance day after day. This rotating shaft is cast out of tough, long-lasting iron and is polished to a mirror finish, raising and lowering the valves in time with the movement of the piston to ensure that fresh mixture rushes in and exhaust exits. Installed in early SOHC heads, which were fitted in single overhead cam or twin-shaft DOHC designs in the later ones, the Camshaft ensures the combustion cycle is crisp and helps in quick revs and constant torque, which drivers experience in smooth acceleration. The compatibility is almost cross compatible across all generations of the 626 family, which includes the four-cylinder and the V6 engines, thus making it easy to choose the appropriate unit when rebuilding a sedan. Careful indexing of sprockets synchronizes timing with the crank, protecting pistons against contact with the valves and providing an important measure of security and undoubted strength benefits. The lobes on Mazda powerplants ride on low-friction journals, and the clean oil circulating in each gallery keeps wear down, ensuring that efficiency is high and emissions are kept low enough to suit daily commuting. The part lasts hundreds of thousands of kilometers before any noticeable wear is visible, and such durability is praised by many owners, which overall contributes to the Mazda's reputation for being a very durable car. However, special features like bucket followers on DOHC models enable higher lift with less noise and clatter, and the core is designed to be in balance to avoid vibration that would otherwise be transmitted to the valvetrain. To the point, this Camshaft is a symbol of Mazda engineering in that it combines the three characteristics of reliability, efficiency, and spirited response into a single, small, diligent part.
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