Intake Manifold Lower
REMOVAL - INTAKE MANIFOLD LOWER1. 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 (Fig. 111).
9. Remove lower manifold.
10. Inspect manifold.
INSPECTION - INTAKE MANIFOLD LOWER
Check manifold for:
^ Damage and cracks
^ Gasket surface damage or warpage
^ Damaged fuel injector ports
If the manifold exhibits any of these conditions, replace the manifold.
INSTALLATION - INTAKE MANIFOLD LOWER
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.
4. Install manifold attaching bolts and tighten in sequence shown in (Fig. 111) to 12 Nm (105 inch lbs.). Remove bolt used for aligning manifold.
5. Connect the fuel injector electrical connectors.
NOTE: Make sure fuel injectors are located in the correct location and 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.