Nissan 17521-AC700 Pipe Assembly

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First, depressurize the fuel system and detach the battery. Also, detach the intake manifold as well as the fuel supply line and injector connectors. Pull off the retainer and injector from the fuel rail. If needed, remove the fuel pressure damper. Install the injector retaining clips and insert each injector into the fuel rail.

Remove the engine cover, fuel tank cap, and battery cable. Drain the coolant and remove the air intake duct and intake manifold plenum. Detach the fuel supply line and pulsation damper, unplug the connectors from the fuel injectors, and clean around them. Remove the mounting bolts, fuel rail and injectors, then the 0-rings and the pulsation damper. Coat the new 0-rings with oil and install them on the injectors. Install each injector into the fuel rail. Clean the injector bores in the intake manifold, install the fuel rail mounting bolt spacers, and reconnect the fuel supply line, then turn on the ignition switch and look for leaks.