Rocker Valve Cover Assembly
This upper engine cover seals the top of the cylinder head, keeping oil in and dirt out. It also quiets valvetrain noise, routes return oil, and houses the PCV baffle that controls crankcase fumes. Built to OE spec for heat and vibration, it maintains a clean, dry engine bay and a stable idle.
Why it’s needed ️
Without a tight cover and gasket, hot oil would splash out, dust could enter, and the ventilation path would fail. A precise seal protects cams/rockers and keeps spark plug wells dry for reliable ignition.
How it works ⚙️
A rigid lid clamps to the head with a molded gasket and grommets. Internal baffles separate oil mist; clean vapors exit through the PCV port, while oil drains back to the sump. Coil and harness mounts integrate on top for tidy service.
When it breaks ⚠️
Cracks or a hardened gasket cause oil leaks , burning smell, smoke near the exhaust, and engine stains. Oil in plug wells triggers misfire and rough idle; vacuum leaks may set a check engine light. Long neglect risks low oil level and catalyst damage. Replacement restores sealing, ventilation, and smooth running.
Compatibility
- Quest
- Teana
- Murano
- Pathfinder
- Elgrand
- Maxima
- Murano Crosscab
