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Home >> Subaru >> 2021 >> Ascent Base >> Repair and Diagnosis >> Engine Mechanical >> Exhaust System >> Front Exhaust Pipe >> Installation
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Front Exhaust Pipe: Installation

  1. Install the turbocharger stay.

    Tightening torque: 

    19 N.m (1.9 kgf-m, 14.0 ft-lb)

    G13620453Courtesy of SUBARU OF AMERICA, INC.
  2. Replace the intake duct No. 2 gasket with a new part, and lock the spring.
    G13199042Courtesy of SUBARU OF AMERICA, INC.
  3. Using a new gasket, temporarily install the front exhaust pipe, center exhaust pipe (front) and turbo charger as a unit.
    CAUTION:
    • Be sure to install the front exhaust pipe to the cylinder head  .
    • In order to prevent damaging the intake duct No. 2, temporarily install it with care while adjusting it by hand  .
    NOTE: Support the front exhaust pipe with the transmission jack.
    G13199043Courtesy of SUBARU OF AMERICA, INC.
  4. Tighten the nuts in the numerical order as shown in the figure.

    Tightening torque: 

    65 N.m (6.6 kgf-m, 47.9 ft-lb)

    Fig 1: Turbocharger Nuts Tightening Sequence
    G13199044Courtesy of SUBARU OF AMERICA, INC.
  5. Connect the intake duct No. 2, and the turbocharger.
    CAUTION: Confirm that the connections are secure.
  6. Install the bolt which secures the intake duct No. 2.

    Tightening torque: 

    16 N.m (1.6 kgf-m, 11.8 ft-lb)

  7. Install the bolts securing the exhaust stay.

    Tightening torque: 

    33 N.m (3.4 kgf-m, 24.3 ft-lb)

    G13199038Courtesy of SUBARU OF AMERICA, INC.
  8. Install the oil catch tank. Ref. to INTAKE (INDUCTION) (H4DOTC)>Oil Catch Tank>INSTALLATION .
  9. Connect the electronic control waste gate valve connector (A) and the electronic control air by-pass valve connector (B).
    G13199037Courtesy of SUBARU OF AMERICA, INC.
  10. Connect the rear oxygen sensor connector and ground cord.

    Tightening torque: 

    7.5 N.m (0.8 kgf-m, 5.5 ft-lb)

  11. Connect the front oxygen (A/F) sensor connector, and install the clip.
  12. Install the intake duct No. 1. Ref. to INTAKE (INDUCTION) (H4DOTC)>Intake Duct>INSTALLATION>INTAKE DUCT NO. 1 .
  13. Install the center exhaust pipe (rear). Ref. to EXHAUST (H4DOTC)>Center Exhaust Pipe>INSTALLATION>CENTER EXHAUST PIPE (REAR) .
  14. Temporarily tighten the bolts which hold the turbocharger stay.
    G13199033Courtesy of SUBARU OF AMERICA, INC.
  15. Tighten the bolts which hold the turbocharger stay in the numerical order shown in the figure.

    Tightening torque: 

    33 N.m (3.4 kgf-m, 24.3 ft-lb)

    Fig 2: Turbocharger Stay Bolts Tightening Sequence
    G13199048Courtesy of SUBARU OF AMERICA, INC.
  16. Use a new gasket to connect the oil pipe to the chain cover.

    Tightening torque: 

    24 N.m (2.4 kgf-m, 17.7 ft-lb)

  17. Connect the water hose to the water tank pipe assembly.
  18. Install the radiator fan and fan motor assembly. Ref. to COOLING (H4DOTC)>Radiator Fan and Fan Motor Assembly>INSTALLATION .
  19. Install the air intake duct. Ref. to INTAKE (INDUCTION) (H4DOTC)>Air Intake Duct>INSTALLATION .
  20. Check the engine oil level and replenish the engine oil if necessary. Ref. to LUBRICATION (H4DOTC)>Engine Oil>INSPECTION .
  21. Connect the ground terminal to battery sensor. Ref. to REPAIR CONTENTS>NOTE>BATTERY .
  22. Fill engine coolant. Ref. to COOLING (H4DOTC)>Engine Coolant>REPLACEMENT>FILLING OF ENGINE COOLANT .
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