Parts for your 2003 Nissan Navara-Manifold gasket

2003 Nissan Navara manifold-gasket

Per Nissan’s own technical literature, the 2003 Navara (D22) engines—such as the YD25DDTi 2.5 diesel and KA24DE 2.4 petrol—use both intake and exhaust manifold gaskets. The Nissan Navara D22 Service Manual (Engine section) and the Nissan FAST parts catalogue list these gaskets as service parts and specify replacement when the manifold is removed or a leak is present. So, yes—manifold-gasket is relevant and factory-fitted on the 2003 Nissan Navara.

On this ute, the manifold-gasket does a deceptively big job. It seals the join between the cylinder head and the intake or exhaust manifold so the engine breathes properly. On the intake side, it keeps unmetered air out, which helps the Navara idle smoothly and fuel correctly. On the exhaust side, it keeps hot gases contained on their way to the cat or turbo (on YD25), protecting nearby components, maintaining backpressure and boost, and keeping noise and fumes down.

There’s no set kilometre interval for replacement in the workshop manuals, but the gasket should be renewed any time the manifold is off, or if there are symptoms of a leak. Nissan service information notes to follow the factory tightening sequence and torque values, and to inspect studs and nuts