2004 Subaru Impreza RS, AutomaticFACTORY OEM SERVICE PROCEDURE

Intake Manifold: Disassembly

  1. Remove the ignition coil & ignitor Assy. < Ref. to REMOVAL , Ignition Coil & Ignitor Assy. >
  2. Remove the throttle body. < Ref. to REMOVAL , Throttle Body. >
  3. Remove the air assist injector solenoid valve from the intake manifold. < Ref. to REMOVAL , Air Assist Injector Solenoid Valve. >
  4. Disconnect the pressure regulator vacuum hose from the intake manifold.
    Fig 1: Disconnecting Pressure Regulator Vacuum Hose From Intake Manifold
    G00800501Courtesy of SUBARU OF AMERICA, INC.
  5. Remove the fuel pipe protector LH.
    Fig 2: Removing Fuel Pipe Protector LH
    G00800502Courtesy of SUBARU OF AMERICA, INC.
  6. Remove the fuel pipe protector RH.
    Fig 3: Removing Fuel Pipe Protector (RH Side)
    G00800503Courtesy of SUBARU OF AMERICA, INC.
  7. Disconnect the connectors from the fuel injectors.
    Fig 4: Disconnecting Connectors From Fuel Injectors
    G00800504Courtesy of SUBARU OF AMERICA, INC.
  8. Disconnect the purge control solenoid valve. < Ref. to REMOVAL , Purge Control Solenoid Valve. >
  9. Remove the harness bands (A) and bolts (B) which hold the engine harness onto intake manifold.
    Fig 5: Identifying Harness Bands (A) & Bolts (B)
    G00800505Courtesy of SUBARU OF AMERICA, INC.
  10. Remove the engine harness from the intake manifold.
  11. Remove the bolt which installs injector pipe on the intake manifold as shown in figure.
    • RH SIDE 
      Fig 6: Removing Bolt (RH Side) (1 Of 2)
      G00800506Courtesy of SUBARU OF AMERICA, INC.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.