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Home >> Subaru >> 2021 >> Forester Base >> Repair and Diagnosis >> Engine Mechanical >> Fuel System >> Fuel Injection System >> Knock Sensor >> Installation >> LH Side
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LH Side

  1. Connect the coupling harness and install the knock sensor using a claw-foot wrench.
    NOTE:
    • Knock sensor must be positioned so that the connector center comes within the range shown in the figure.
    • Make sure that the knock sensor and its connector do not touch the adjacent parts.
    G13867506Courtesy of SUBARU OF AMERICA, INC.

    Tightening torque: 

    Calculation formula

    T = 24 N.m (2.4 kgf.m, 17.7 ft.lb) x L1/(L1 + L2)

    T: Reading of the torque wrench L1: Effective length of the torque wrench L2: Effective length of the crowfoot wrench

    NOTE: If the effective length of the tool used is unknown, consult the manufacturer of the tool.
    G13867507Courtesy of SUBARU OF AMERICA, INC.
    G13223971Courtesy of SUBARU OF AMERICA, INC.
  2. Install the clip (D) and clip (E), and connect the connector (C).
  3. Install the engine wiring harness stay.
    NOTE: Use the following formula to calculate the reading of a torque wrench when tightening with a crowfoot wrench.
    Calculation formula
    T = 19 N.m (1.9 kgf.m, 14.0 ft.lb) x L1/(L1 + L2)
    T: Reading of the torque wrench
    L1: Effective length of the torque wrench
    L2: Effective length of the crowfoot wrench
    NOTE: If the effective length of the tool used is unknown, consult the manufacturer of the tool.
    G13867509Courtesy of SUBARU OF AMERICA, INC.

    Tightening torque: 

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

  4. Install the clip (B).
  5. Install the engine ground and the harness case.

    Tightening torque: 

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

  6. Connect the connector (A).
    G13223970Courtesy of SUBARU OF AMERICA, INC.
  7. Install the intake manifold assembly. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO)>Intake Manifold Assembly>INSTALLATION .
  8. Install the air intake boot. Ref. to INTAKE (INDUCTION) (H4DO)>AIR INTAKE BOOT>INSTALLATION .
  9. Install the collector cover. Ref. to INTAKE (INDUCTION) (H4DO)>COLLECTOR COVER>INSTALLATION .
  10. Connect the ground terminal to battery sensor. Ref. to GROUND TERMINAL REMOVAL OR INSTALLATION .