Chevrolet 12606110 Multiport Fuel Injector Assembly

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For turbocharged engines, additional steps include removing the fuel rail high-pressure feed pipe and intake manifold. Carefully remove the foam fuel injector insulator, electrical connectors, and any remaining connections. Remove the fuel rail using a special injector removal tool if necessary.

The initial steps are to relieve the fuel system pressure and disconnect the negative battery terminal. Then, remove the air intake duct and coolant overflow pipe if necessary.

Start by relieving the fuel system pressure and equalizing the tank pressure by removing the fuel filler cap.

To remove the fuel injectors, start by relieving the fuel system pressure and disconnecting the negative battery terminal. Then, remove the air intake duct and coolant overflow pipe if necessary. Release the quick-connect line fitting at the fuel rail and disconnect the electrical connectors from the fuel injectors. Remove the fuel rail mounting bolts and remove the fuel rail and injectors as a single assembly. Remove the retainer securing each fuel injector to the fuel rail and pull out the injector. Remove the old O-rings from each injector and discard them. For installation, lubricate the new injector O-rings with clean engine oil and tighten the fuel rail mounting bolts to the proper torque specifications. Reconnect the battery and start the engine to check for fuel leaks. On turbocharged engines, additional steps include removing the fuel rail high-pressure feed pipe and intake manifold. Carefully remove the foam fuel injector insulator, electrical connectors, and any remaining connections. Remove the fuel rail, using a special injector removal tool if necessary. Remove the old Teflon sealing ring and upper O-ring from each injector. To install the new Teflon seal, use the special tools included in the injector tool set or a socket of similar diameter. Install the support ring, upper O-ring, and Teflon seal on each injector. Clean the injector bores and install the spring steel retainer on each injector. Install the fuel rail and injectors, tightening the mounting bolts and high-pressure fuel line fittings to the correct torque specifications. Reconnect the battery and start the engine to check for fuel leaks.

To remove the fuel injectors, first relieve the fuel system pressure and disconnect the negative battery terminal. Remove the engine cover and the air intake duct. For four-cylinder models, clean the fuel injector areas with compressed air, then unbolt the fuel line support bracket and disconnect the fuel line from the rail and the quick-connect fitting. Disconnect the wiring from the fuel injectors, remove the fuel rail mounting bolts, and extract the fuel rail with its injectors. Release the fuel injector retaining clips and remove each injector, discarding the upper and lower O-rings. For 2002 and 2003 (3.0L) V6 models, disconnect the fuel line and intake manifold, disconnect wiring from the injectors, and remove the fuel rail with its injectors. For 2004 and later (3.5L) V6 models, remove the upper intake manifold, disconnect electrical connectors from the injectors, disconnect the fuel supply line, remove the fuel rail mounting bolts, and take out both fuel rails with injectors. Finally, for all models, coat new upper and lower O-rings with engine oil, install them on the injectors, insert the injectors into the fuel rail, and secure the fuel rail on the intake manifold. Reconnect the battery terminal, activate the fuel pump, and check for fuel leaks.