Chevrolet 12633784 Direct Fuel Injector Assembly

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To remove the fuel injectors, first relieve the fuel system pressure and disconnect the negative terminal of the battery. On 3.6L engines, remove the upper intake manifold. Disconnect the fuel supply line at the fuel rail and the electrical connectors for the main fuel injector harness and each injector. Remove the fuel rail mounting fasteners and take out both fuel rails and their injectors as an assembly. Release the fuel injector retaining clips and remove each injector from its bore in the fuel rail, discarding the upper and lower O-rings. For 2010 and later models, disconnect the fuel supply line at the fuel rail and remove the intake manifold. Remove the fuel rail mounting bolts evenly to relieve pressure, then disconnect the electrical connector and the four fuel injector electrical connectors. Remove the fuel rail and injectors from the cylinder head, and use external snap-ring pliers to remove the retaining clip and each injector from the fuel rail. For V6 engines, disconnect the fuel supply line at the fuel rail and remove the intake manifold, foam insulator, fuel rail pressure sensor, and high-pressure fuel line. Remove the fuel rail mounting bolts and pry out the fuel rail and injectors from the cylinder head. Disconnect the injector harness and remove the retaining clip and each injector from the fuel rail. To install new injectors, coat the upper and lower O-rings with engine oil and slide them onto each injector. Insert each injector into its bore in the fuel rail and install the retaining clips. Install the injectors and fuel rail assembly onto the intake manifold, tightening the mounting bolts to the specified torque. The remaining installation steps are the reverse of removal. If a special tool is not available, the Teflon seal can be installed by working it onto a socket and sliding it onto the injector. After installation, install a new support ring and upper O-ring on each injector, clean the injector bores, and install a new compensation element and retaining ring on the bottom of each injector. Push each injector into its bore in the cylinder head, install a spring steel retainer, and then install the fuel rail, tightening the mounting bolts in the proper sequence and torque specifications. Finally, clean the high-pressure fuel line fittings and apply engine oil before installing the new high-pressure fuel line.

Disconnect the electrical connector for the main fuel injector harness, as well as the electrical connectors for the coolant temperature and camshaft position sensors. Also, disconnect the electrical connector from each injector.

To remove the SL engine, start by relieving the fuel system pressure and disconnecting the battery. Then, remove the engine cover, insulation, and ignition coils. Disconnect the fuel rail pressure sensor and individual injector connectors, and move the harness out of the way. Disconnect the fuel rail harness connector and the high-pressure fuel pipe. Remove the fuel injector assembly screws using either Method 1 or Method 2. Next, remove the injectors from the fuel rail by carefully prying the assembly apart and pulling the injectors away. For 2.0L and 2.5L engines, disconnect the high-pressure fuel pipe, remove the intake manifold, and disconnect the fuel rail harness and pressure sensor connectors. Remove the fuel rail mounting bolts and upper grommets, and disconnect the electrical connector from the fuel rail harness. Remove the bolts and work the fuel rail and injectors from the cylinder head. Disconnect the fuel injector electrical connectors and remove the injector harness. To service the injectors, remove the Teflon seal by cutting it from the injector. For Teflon seal installation, use a fuel injector service kit and wrap aluminum AC ducting tape around the lower injector seal groove. Install the seal onto the injector body using the injector service tool, remove the tape, and repeat the steps for the lower groove. Compress the seals using the correct diameter compression ring. Finally, install the injectors and fuel rail back into the cylinder head, tighten the bolts, and check for leaks before starting the engine.

For installation, coat the new upper o-rings with clean engine oil and slide them into place on each injector. Coat the new lower o-rings with clean engine oil and install them on the lower ends of the injectors.

This is one injector per order