Lower Intake Manifold
REMOVAL1. Release fuel system pressure.
2. Remove upper intake manifold.
3. Disconnect electrical connectors from the fuel injectors.
4. Remove fuel supply hose from fuel rail.
5. Remove screw attaching fuel rail support bracket to the throttle body support bracket.
6. Remove bolts attaching fuel rail.
7. Remove fuel rail and injectors as an assembly.
8. Remove manifold attaching bolts.
9. Remove lower manifold.
INSTALLATION
1. Clean and inspect sealing surfaces of cylinder head and manifold. Gaskets can be reused provided they are free of cuts or tears.
2. Position manifold on cylinder head surfaces.
NOTE: For ease of installing upper intake manifold, install a bolt 2 - 3 turns to the rearmost attaching hole of intake. This will properly position lower manifold.
3. Install fuel rail with injectors.
Fig. 50
4. Install manifold attaching bolts and tighten in sequence shown in (Fig. 50) to 12 Nm (105 in. lbs.). Remove bolt used for aligning manifold.
5. Connect the fuel injector electrical connectors.
NOTE: Make sure fuel injectors are located in the correct position, as upper intake manifold interference could occur.
6. Install screw attaching fuel rail support bracket to the throttle body support bracket.
7. Connect fuel supply hose to fuel rail.
8. Install upper intake manifold.
9. With the DRB scan tool use ASD Fuel System Test to pressurize system to check for leaks.
CAUTION: When using the ASD Fuel System Test, the Auto Shutdown (ASD relay will remain energized for 7 minutes or until the ignition switch is turned to the OFF position, or Stop All Test is selected.