Lower Intake Manifold
INTAKE MANIFOLD LOWERREMOVAL
1. Perform fuel pressure release procedure.
2. Drain the cooling system.
3. Disconnect the radiator upper hose from the coolant outlet at front of manifold.
4. Remove the upper intake manifold.
5. Disconnect the electrical connectors to fuel injectors and coolant temperature sensor.
6. Disconnect heater and coolant bottle supply hoses from coolant tube at rear of intake manifold (Fig. 127).
7. Disconnect the fuel supply hose from fuel rail.
8. Remove the screw attaching the fuel rail support bracket to the throttle body support bracket.
9. Remove the bolts attaching fuel rail.
10. Remove fuel rail and injectors as an assembly.
11. Remove bolts attaching lower intake and remove intake manifold (Fig. 128).
INSPECTION
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
1. Clean all sealing surfaces.
NOTE: Gaskets can be reused provided they are free of tears or cuts.
2. Inspect gaskets for tears or cuts. Replace as necessary.
3. Position gaskets and intake manifold on cylinder head surfaces.
4. Install fuel rail with injectors.
Lower:
5. Install intake manifold bolts and gradually tighten in sequence shown in (Fig. 129) until a torque of 28 Nm (250 in. lbs.) is obtained.
6. Install screw attaching fuel rail support bracket to the throttle body support bracket.
7. Connect fuel supply hose to fuel rail.
8. Connect heater and coolant bottle supply hoses to coolant tube at rear of intake manifold (Fig. 127).
9. Connect electrical connectors to fuel injectors and coolant temperature sensor.
10. Install the upper intake manifold.
11. Connect the radiator upper hose to the coolant outlet at front of lower manifold.
12. Fill the cooling system.