LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Subaru >> 2018 >> Impreza Base, 4D Sedan, Automatic CVT Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control/Fuel System >> Intake Manifold Assembly >> Removal
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Intake Manifold Assembly: Removal

  1. If the fuel delivery tube is disconnected after removing the intake manifold assembly, perform the following work.
    1. Release the fuel pressure. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO)>Fuel>PROCEDURE>RELEASING OF FUEL PRESSURE .
    2. Open the fuel filler lid and remove the fuel filler cap.
    NOTE: This operation is required to release the inner pressure of the fuel tank.
  2. Remove the battery. Ref. to STARTING/CHARGING SYSTEMS (H4DO)>Battery>REMOVAL .
  3. Drain approximately 3.0 L (3.2 US qt, 2.6 Imp qt) of coolant. Ref. to COOLING (H4DO)>Engine Coolant>REPLACEMENT>DRAINING OF ENGINE COOLANT .
  4. Remove the clip from the air intake boot, and loosen the clamp.
    Fig 1: Locating Air Intake Boot Clips
    G11252776Courtesy of SUBARU OF AMERICA, INC.
  5. Remove the air intake boot, and place it aside so that it does not interfere with the work.
    CAUTION: Be careful not to pull out the PCV hose.
    Fig 2: Removing Air Intake Boot
    G11252777Courtesy of SUBARU OF AMERICA, INC.
  6. Disconnect the preheater hose (A) from the throttle body, and disconnect the connector (B).
  7. Disconnect the connector (C) from manifold absolute pressure sensor.
  8. Disconnect the connector (D) from the purge control solenoid valve, and remove clip (E).
  9. Disconnect the evaporation hose (F) from the purge control solenoid valve.
  10. Disconnect the PCV hose (G).
  11. Remove the bolt (H) securing the fuel pipe.
    Fig 3: Intake Manifold Assembly Components Location
    G11252783Courtesy of SUBARU OF AMERICA, INC.
  12. Disconnect the connector (A) from the tumble generator valve RH.
  13. Remove the fuel delivery tube clamp (B).
  14. Remove clip (C) securing the engine wiring harness.
    Fig 4: Tumble Generator Valve Connector, Tube Clamp & Clip Location
    G11252784Courtesy of SUBARU OF AMERICA, INC.
  15. Remove nut (A) securing the EGR cooler to the EGR control valve.
  16. Remove stud bolt (B) using TORX® E8.
  17. Loosen bolts (C) securing the EGR cooler to the cylinder head RH.
    Fig 5: Locating EGR Cooler, Control Valve Nut & Bolts
    G11252785Courtesy of SUBARU OF AMERICA, INC.
  18. Remove the V-belt covers.
    Fig 6: Locating V-Belt Covers
    G11252786Courtesy of SUBARU OF AMERICA, INC.
  19. Disconnect the connector (A), connector (B) and terminal (C). (Fixed capacity A/C model)
  20. Remove the clip (D) and clip (E) that secure the battery cable. (Fixed capacity A/C model)
    Fig 7: Locating Intake Manifold Assembly Connectors, Terminal & Clips (Fixed Capacity A/C)
    G11252787Courtesy of SUBARU OF AMERICA, INC.
  21. Disconnect the connector (A), connector (B), connector (C) and terminal (D). (Variable capacity A/C model)
  22. Remove the clip (E) and clip (F) that secure the battery cable. (Variable capacity A/C model)
    Fig 8: Locating Intake Manifold Assembly Connectors, Terminal & Clips (Variable Capacity A/C)
    G11252788Courtesy of SUBARU OF AMERICA, INC.
  23. Disconnect the connector (A) from the EGR control valve.
  24. Remove the fuel delivery tube.
    Fig 9: Locating EGR Control Valve Connectors
    G11252789Courtesy of SUBARU OF AMERICA, INC.
  25. Disconnect the brake booster vacuum hose (A).
  26. Remove clip (B) securing battery cable.
  27. Disengage 2 claws (C) and remove the harness protector.
    Fig 10: Locating Brake Booster Vacuum Hose, Clip And Harness Protector Claws
    G11252790Courtesy of SUBARU OF AMERICA, INC.
  28. Disconnect the connector (A) from the tumble generator valve LH.
  29. Remove clip (B) securing the engine wiring harness.
    Fig 11: Locating Connector And Clip
    G00570332Courtesy of SUBARU OF AMERICA, INC.
  30. Remove the fuel pipe protector.
    Fig 12: Removing Fuel Pipe Protector
    G00570336Courtesy of SUBARU OF AMERICA, INC.
  31. Remove the intake manifold assembly.
    • RH side
      Fig 13: Locating Intake Manifold Assembly Bolts (RH)
      G11252792Courtesy of SUBARU OF AMERICA, INC.
    • LH side
      Fig 14: Locating Intake Manifold Assembly Bolts (LH)
      G11252793Courtesy of SUBARU OF AMERICA, INC.
  32. Remove the cylinder head plate from cylinder head.
    Fig 15: Locating Cylinder Head Plates
    G11252794Courtesy of SUBARU OF AMERICA, INC.
  33. Disconnect the fuel delivery pipe from the high-pressure fuel pump. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO)>Fuel Delivery and Evaporation Lines>REMOVAL>QUICK CONNECTOR DISCONNECTION (TYPE C) .
    Fig 16: Locating High Pressure Fuel Pump Delivery Pipe Connector
    G11252795Courtesy of SUBARU OF AMERICA, INC.
  34. Disconnect the fuel delivery pipe (A) from the fuel pipe. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO)>Fuel Delivery and Evaporation Lines>REMOVAL>QUICK CONNECTOR DISCONNECTION (TYPE B) .
  35. Disconnect the fuel delivery cube (B) from the fuel pipe. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO)>Fuel Delivery and Evaporation Lines>REMOVAL>QUICK CONNECTOR DISCONNECTION (TYPE A) .
    Fig 17: Locating Fuel Delivery Pipe And Cube
    G11252796Courtesy of SUBARU OF AMERICA, INC.
scientia non olet · About LEMON Manuals