2015 Subaru WRX BaseFACTORY OEM SERVICE PROCEDURE

Intake Manifold: Assembly

WARNING: This page is about a different variant/trim than selected.
  1. Apply liquid gasket to the nipple threads, and install the nipple to the intake manifold.

    Liquid gasket: 

    THREE BOND 1105 (Part No. 004403010) or equivalent 

    Tightening torque: 

    T1: 17 N.m (1.7 kgf-m, 12.5 ft-lb) 

    T2: 25 N.m (2.5 kgf-m, 18.4 ft-lb) 

    Fig 1: Identifying Nipple Threads Liquid Gaskets With Torque Specifications
    G08538706Courtesy of SUBARU OF AMERICA, INC.
  2. Install the tumble generator valve assembly onto intake manifold.
    NOTE: Use a new gasket.

    Tightening torque: 

    8.3 N.m (0.8 kgf-m, 6.1 ft-lb) 

    Fig 2: Locating Intake Manifold Tumble Generator Valve Assembly Bolts
    G06344612Courtesy of SUBARU OF AMERICA, INC.
  3. Install the air intake duct to the intake manifold.

    Tightening torque: 

    17 N.m (1.7 kgf-m, 12.5 ft-lb) 

    Fig 3: Locating Intake Manifold Duct
    G08538703Courtesy of SUBARU OF AMERICA, INC.
  4. Install the fuel pipe assembly to the intake manifold.

    Tightening torque: 

    6.4 N.m (0.7 kgf-m, 4.7 ft-lb) 

    Fig 4: Locating Fuel Pipe Assembly Bolts
    G05333518Courtesy of SUBARU OF AMERICA, INC.
  5. Install the fuel injector pipe LH and connect the LH side fuel hose to the fuel injector pipe LH. <Ref. to CONNECTING FUEL DELIVERY HOSE, FUEL RETURN HOSE AND FUEL HOSE , INSTALLATION, Fuel Delivery, Return and Evaporation Lines.>
    Fig 5: Locating LH Side Fuel Hose Clamps
    G08538701Courtesy of SUBARU OF AMERICA, INC.
  6. Install the fuel injector pipe RH and connect the RH side fuel hose to the fuel injector pipe RH. <Ref. to CONNECTING FUEL DELIVERY HOSE, FUEL RETURN HOSE AND FUEL HOSE , INSTALLATION, Fuel Delivery, Return and Evaporation Lines.>
    Fig 6: Locating RH Side Fuel Hose Bolts
    G08538700Courtesy of SUBARU OF AMERICA, INC.
  7. Install the engine harness to the intake manifold and attach the harness brackets holding the engine harness.

    Tightening torque: 

    19 N.m (1.9 kgf-m, 14.0 ft-lb) 

    Fig 7: Locating Intake Manifold Engine Harness Bolts
    G06344607Courtesy of SUBARU OF AMERICA, INC.
  8. Install the fuel injector.
    NOTE: Use new O-rings, rubbers and seal rings.
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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.