Fuel Rail & Injectors: Installation
WARNING: This page is about a different car, the 2003 Cadillac Seville and 2003 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
In order to reduce the risk of fire and personal injury that may result from a fuel leak, always install the fuel injector "O" rings in the proper position. If the upper and lower "O" rings are different colors (Black and Blue), be sure to install the Blue "O" ring in the upper position and the Black "O" ring in the lower position on the fuel injector. The "O" rings are the same size but are made of different materials.
- Install the fuel pressure regulator, if necessary. Lubricate the NEW injector upper "O" ring seal with clean engine oil. Install the NEW injector "O" ring seal on the injector. Install the fuel injector(s) onto the fuel rail.
- Lubricate the NEW lower injector "O" ring seals with clean engine oil. Install the NEW "O" ring seals on the spray tip end of each injector. Install the fuel rail. Install the fuel rail attaching studs. See Figure. Tighten the fuel rail attaching studs to specification. See TORQUE SPECIFICATIONS .
- Connect the fuel injector electrical connectors to each fuel injector. See Figure. Install the fuel rail bracket retainer nut. Tighten the nut to specification. Install the PCV valve to the cam cover. Install the coolant surge tank inlet pipe. Install the PCV air tube to the cam cover. Connect the fuel pressure regulator vacuum hose.
- Connect the fuel feed and return pipes to the fuel rail. Connect the negative battery cable. Perform the following procedure in order to inspect for leaks: Turn ON the ignition, with the engine OFF for 2 seconds. Turn OFF the ignition for 10 seconds. Turn ON the ignition, with the engine OFF. Inspect for fuel leaks.
- Keeping the injector sight shield as level as possible, place the rear of the shield under the mounting bracket. Align and press the injector sight shield onto the mounting studs. Install the mounting nuts onto the mounting studs and tighten nuts to specification.
- Refill the engine coolant system. See COOLING SYSTEM BLEEDING under COOLING SYSTEM.