Fuel Rail & Fuel Injectors: Installation
WARNING: This page is about a different car, the 2003 GMC Savana and 2003 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
Natural gas is stored under high pressure. If a leak occurs, the high pressure could cause a personal injury. In order to prevent Compressed Natural Gas (CNG) fuel leaks, always replace the CNG fuel system "O" rings during service.
NOTE:
Use NEW "O" rings upon installation. Lubricate all "O" rings with petroleum jelly or equivalent before installation.
- To install reverse removal procedure. Tighten all fasteners to specification. See TORQUE SPECIFICATIONS . Lubricate the NEW fuel injector lower "O" ring seals with clean engine oil. Install the NEW "O" ring seals to the end of each injector. See Fig 1.
- Apply a 0.020" (5 mm) band of Threadlock (GM P/N 1234382), or equivalent, to the threads of all of the fuel rail attaching studs.
- Connect the CNG fuel inlet line using a NEW copper sealing washer. Connect the CNG fuel crossover line using NEW copper sealing washers.
- Start the vehicle and inspect for CNG fuel leaks at the serviced fittings with the Ultrasonic Leak Detector (J 45878) or an equivalent leak detector. With a scan tool command a switch-over to gasoline and inspect for gasoline fuel leaks. Install the engine cover.