Lower Intake Manifold

Lower Intake Manifold

Removing


The fuel system is under constant pressure even with engine off. Before servicing the fuel rail, fuel system pressure must be released.

- Release fuel system pressure. Refer to => [ Fuel System Pressure Release Procedure ] Service and Repair.

- Disconnect the negative battery cable.

- Remove the air inlet hose and upper intake manifold (2). Refer to => [ Upper Intake Manifold ] Upper Intake Manifold.






- Remove the insulator (2) from the LH cylinder head cover.






- Disconnect the fuel supply hose from the fuel rail. Refer to => [ Quick Connect Fitting Disconnecting and Connecting ] Service and Repair.

- Disconnect the fuel injector electrical connectors.

- Disengage the injection/ignition harness retainer (1) form the rear of the lower intake manifold.






- Disengage the main wire harness retainer (2) form the rear of the lower intake manifold.

- Remove the eight lower intake manifold attaching bolts (1).






- Remove the lower intake manifold (2) with the fuel injectors and fuel rail.

- Remove and discard the six lower intake manifold to cylinder head seals (1).






- If required, remove the fuel rail (2) and fuel injectors from the lower intake manifold. Refer to => [ Fuel Rail ] Service and Repair.






Installing

- Clean and inspect the sealing surfaces. Install new lower intake manifold to cylinder head seals (1).






- If removed, install the fuel injectors and the fuel rail (1) to the lower intake manifold. Tighten the four bolts in the sequence shown to 7 Nm (62 in. lbs.). Refer to => [ Fuel Rail ] Service and Repair.






- Position the lower intake manifold (1) on the cylinder head surfaces.






- Install the manifold attaching bolts and tighten in the sequence shown to 8 Nm (71 in. lbs.).

- Engage the main wire harness retainer (2) to the rear of the lower intake manifold.






- Engage the injection/ignition harness retainer (1) to the rear of the lower intake manifold.

- Connect the fuel injector electrical connectors.

- Connect the fuel supply hose to the fuel rail. Refer to => [ Quick Connect Fitting Disconnecting and Connecting ] Service and Repair.

- Install the insulator (2) to the two alignment posts (3) on top of the LH cylinder head cover.






- Install the upper intake manifold (1), support brackets and air inlet hose. Refer to => [ Upper Intake Manifold ] Upper Intake Manifold.






- Connect the negative battery cable.

- Start the engine and check for leaks.