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Home >> Subaru >> 2005 >> Impreza WRX STi >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel Injection (Fuel Systems) -- H4DOTC >> Intake Manifold >> Installation
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Intake Manifold: Installation

  1. Install the intake manifold onto cylinder heads.
    NOTE: Always use new gaskets.

    Tightening torque: 

    25 N.m (2.5 kgf-m, 18.1 ft-lb) 

    Fig 1: Installing Intake Manifold Onto Cylinder Heads
    G03816740Courtesy of SUBARU OF AMERICA, INC.
  2. Connect the fuel delivery hose, return hose and evaporation hose.
    Fig 2: Connecting Fuel Delivery Hose, Return Hose And Evaporation Hose
    G03816741Courtesy of SUBARU OF AMERICA, INC.
  3. Connect the connector to the oil pressure switch (B), crankshaft position sensor (C) and engine coolant temperature sensor (A).
    Fig 3: Connecting Oil Pressure Switch, Crankshaft Position Sensor And Engine Coolant Temperature Sensor
    G03816742Courtesy of SUBARU OF AMERICA, INC.
  4. Connect the connector to the knock sensor.
    Fig 4: Connecting Connector To Knock Sensor
    G03816743Courtesy of SUBARU OF AMERICA, INC.
  5. Connect the connector to the camshaft position sensor.
    Fig 5: Connecting Connector To Camshaft Position Sensor
    G03816744Courtesy of SUBARU OF AMERICA, INC.
  6. Connect the connector to the ignition coil.
    Fig 6: Connecting Connector To Ignition Coil
    G03816745Courtesy of SUBARU OF AMERICA, INC.
  7. Connect the engine harness with clip (A) to the bracket.
    Fig 7: Connecting Engine Harness With Clip To Bracket
    G03816746Courtesy of SUBARU OF AMERICA, INC.
  8. Connect the engine harness connector to the bulkhead harness connectors.
    Fig 8: Connecting Engine Harness Connector To Bulkhead Harness Connectors (1 Of 2)
    G03816747Courtesy of SUBARU OF AMERICA, INC.
    Fig 9: Connecting Engine Harness Connector To Bulkhead Harness Connectors (2 Of 2)
    G03816748Courtesy of SUBARU OF AMERICA, INC.
  9. Connect the brake booster vacuum hose.
    Fig 10: Connecting Brake Booster Vacuum Hose
    G03816749Courtesy of SUBARU OF AMERICA, INC.
  10. Connect the engine coolant hoses to the throttle body.
    Fig 11: Connecting Engine Coolant Hoses To Throttle Body
    G03816750Courtesy of SUBARU OF AMERICA, INC.
  11. Connect the emission hose (A) and connector (B) to the PCV hose assembly.
    Fig 12: Connecting Emission Hose And Connector To PCV Hose Assembly
    G03816751Courtesy of SUBARU OF AMERICA, INC.
  12. Connect the pressure hose to the intake duct.
    Fig 13: Connecting Pressure Hose To Intake Duct
    G03816752Courtesy of SUBARU OF AMERICA, INC.
  13. Install the power steering pump.
    1. Install the power steering tank on the bracket.
      Fig 14: Installing Power Steering Tank On Bracket
      G03816753Courtesy of SUBARU OF AMERICA, INC.
    2. Connect the connector to the power steering pump switch.
      Fig 15: Connecting Connector To Power Steering Pump Switch
      G03816754Courtesy of SUBARU OF AMERICA, INC.
    3. Install the power steering pump, and tighten the bolts.

      Tightening torque: 

      22 N.m (2.2 kgf-m, 15.9 ft-lb) 

      Fig 16: Installing Power Steering Pump Bolts
      G03816755Courtesy of SUBARU OF AMERICA, INC.
    4. Install the power steering pipe brackets on the intake manifold RH.
      Fig 17: Installing Power Steering Pipe Brackets On Intake Manifold RH
      G03816756Courtesy of SUBARU OF AMERICA, INC.
    5. Install the front side V-belt. < Ref. to INSTALLATION , V-belt. >
  14. Install the coolant filler tank. < Ref. to INSTALLATION , Coolant Filler Tank. >
  15. Connect the accelerator cable.
    Fig 18: Connecting Accelerator Cable
    G03816757Courtesy of SUBARU OF AMERICA, INC.
  16. Install the intercooler. < Ref. to INSTALLATION , Intercooler. >
  17. Install the air cleaner element.
  18. Install the air cleaner upper cover and air intake duct as a unit. < Ref. to INSTALLATION , Air Cleaner Case. >
  19. Connect the connector to the fuel pump relay.
    Fig 19: Connecting Connector To Fuel Pump Relay
    G03816758Courtesy of SUBARU OF AMERICA, INC.
  20. Connect the battery ground cable to battery.
  21. Lift up the vehicle.
  22. Install the under cover.
  23. Fill the engine coolant. < Ref. to FILLING OF ENGINE COOLANT , REPLACEMENT, Engine Coolant. >