Sienna 1998-1999

Intake Manifold


Removal & Installation

  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  3. Remove or disconnect the following:

    Wiper and blade assembly
    Top cowl seal and panel
    Window washer hoses from the ventilator louvers
    Left and right ventilator louvers
    Heater air duct

  5. Properly relieve the fuel system pressure.
  7. Remove the battery and battery tray.
  9. Drain and recycle the engine coolant.
  11. Remove or disconnect the following:
    The delivery pipes with injectors will be attached to the manifold.

    Accelerator cable, on automatic transaxles
    Throttle cable
    Air cleaner cap assembly
    Any wiring or hoses interfering with removal
    Right side engine mount stay
    Radiator and heater hoses in the way of the intake manifold removal
    V-bank cover
    All the vacuum hose and wiring for the emission control valve set
    Air intake chamber and discard the gasket
    Exhaust Gas Recirculation (EGR) pipe and discard the gaskets
    Hydraulic motor pressure hose from the air intake chamber
    Engine wiring harnesses from the left side, right side, rear and No. 3 timing belt cover
    Front exhaust pipe, if necessary
    Timing belt, camshaft timing pulleys, No. 2 idler pulley and No. 3 timing belt cover
    Cylinder head rear plate
    2 bolts, nuts and plate washers with the intake manifold.

    Other fuel related components such as the No. 2 fuel pipe and pulsation damper, if needed
    Delivery pipes from the intake manifold

  13. Clean and inspect the intak