Valve Covers

Valve Covers: Protecting Your Engine's Top End Components

The Nissan of Alhambra parts team has all the parts you need for your restoration, modification, or repair project. Valve covers are aluminum or plastic components that seal the top portion of your engine, protecting valve train components from debris while containing engine oil. These covers maintain proper lubrication and prevent contamination of critical engine parts through their integrated gasket system. The gasket between the valve cover and cylinder head creates an airtight seal that keeps oil where it belongs while allowing proper ventilation through the PCV system.

Understanding Valve Cover Functions

Modern Nissan vehicles like the 370Z and GT-R feature sophisticated valve cover designs with integrated components such as coil pack mounts and breather systems. These covers endure extreme temperature variations and constant exposure to hot engine oil, making material quality essential for long-term performance. Valve covers work alongside other sealing components to maintain proper engine compression and prevent oil contamination of the ignition system.

Signs Your Valve Covers Need Replacement

Oil leaks around the valve cover perimeter indicate gasket failure, often appearing as dark stains on the engine block or garage floor. Burning oil smells during driving suggest oil dripping onto hot exhaust components, while rough idling might indicate vacuum leaks through deteriorated gaskets. Advanced cases may show oil contamination around spark plugs or ignition components, requiring immediate attention to prevent engine damage.

When to Replace and Why Choose Genuine

Valve cover gaskets typically need replacement every 80,000 to 120,000 miles, though oil change intervals and driving conditions influence their longevity. Genuine Nissan valve covers and gaskets maintain precise tolerances and use materials specifically engineered for your engine's requirements. Aftermarket alternatives often feature substandard gasket materials that may shrink, crack, or fail prematurely.

Get out of the garage and back on the road in no time with genuine OEM parts from Nissan of Alhambra.