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Home >> Subaru >> 2017 >> WRX STI Limited >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel Injection System (2.5L) >> Knock Sensor >> Installation
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Knock Sensor: Installation

  1. Install the knock sensor to the cylinder block.
    NOTE: The portion of the knock sensor cord that is pulled out must be positioned at a 60° angle relative to the engine rear.

    Tightening torque: 

    24 N.m (2.4 kgf-m, 17.7 ft-lb) 

    Fig 1: Knock Sensor Cord Position Relative To Engine Rear
    G11571569Courtesy of SUBARU OF AMERICA, INC.
  2. Install the secondary air combination valve RH. <Ref. to SECONDARY AIR COMBINATION VALVE RH , INSTALLATION, Secondary Air Combination Valve.>
  3. Install the intake manifold. <Ref. to INSTALLATION , Intake Manifold.>
  4. Install the intercooler. <Ref. to INSTALLATION , Intercooler.>
  5. Connect the battery ground terminal.