Lower

Removal
1. Relieve fuel system pressure.
2. Disconnect battery ground cable.
3. Remove upper intake manifold.
4. Disconnect fuel supply and return lines from fuel injection supply manifold.
5. Disconnect engine control sensor wiring from fuel injectors and wiring retainers. Position engine control sensor wiring out of the way.
6. Disconnect vacuum supply line from fuel pressure regulator.

7. CAUTION: Do not loosen or bend intake manifold runner control actuator cable retainer bracket. Bracket alignment is critical and potential damage to the intake manifold runner control actuator may occur.

NOTE: Use care when removing actuator cable from the IMRC Lever.

Disconnect the intake manifold runner actuator control cable from the lower Intake Manifold (IMRC) lever and bracket.
8. Disconnect the ignition wires from the LH cylinder head (cylinder numbers 4, 5 and 6). Position ignition wires out of the way.
9. If required, remove fuel injection supply manifold and fuel injectors from lower Intake Manifold (IMRC).

Lower Intake Manifold Removal Sequence:

10. Remove lower intake manifold to cylinder head retaining bolts in sequence shown.

11. CAUTION: Do not loosen or damage intake manifold runner control actuator cable retainer bracket.

Remove lower Intake Manifold (IMRC) from cylinder heads.
12. Remove intake manifold gaskets from cylinder heads and discard intake manifold gaskets.





Installation

1. NOTE: Verify operation of intake manifold runner control plate operation.

Follow removal procedure in reverse order using new intake manifold gaskets.





2. Tighten lower intake manifold retaining bolts to 8-12 Nm (71-106 inch lbs.) in sequence shown. Connect fuel supply and return lines.