The Toyota 1.4/1.6 4ZZ/3ZZ tappet cover, commonly known as the valve cover or rocker cover, is the protective component situated on top of the cylinder head for Toyota’s 1.4-liter (4ZZ-FE) and 1.6-liter (3ZZ-FE) engines. These DOHC (Dual Overhead Camshaft) engines were widely used in models like the Corolla, RunX, and Verso. Typically constructed from cast aluminum or sometimes a durable composite, the tappet cover’s primary function is to seal the valvetrain assembly, preventing oil leaks and protecting the camshafts, valve springs, and rocker arms from external contaminants. It often integrates the PCV (Positive Crankcase Ventilation) valve, which is crucial for managing internal engine pressures and ensuring the overall health and longevity of these reliable Toyota engines.
R1000,00