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Home >> Cadillac >> 2004 >> CTS Base, 3.2 N >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 2.6L & 3.2L - Introduction >> Repair Instructions >> Knock Sensor (KS) 2 Replacement >> Installation Procedure

Installation Procedure

  1. Thoroughly clean the mating surfaces of the knock sensor and the engine block. The entire contact surface of the knock sensor must lie directly on the engine block.
    2. Fig 1: Locating Knock Sensor
    GM21524Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Fastener Notice in Cautions and Notices.
    IMPORTANT: DO NOT use washers, spring washers, or toothed washers when installing the knock sensor. Tighten the bolt to the proper torque.
  2. Install the knock sensor (2) on to the engine block.

    Tighten:  Tighten the knock sensor bolt to 20 N.m (15 lb ft).

    3. IMPORTANT: Install the knock sensor pigtail as noted during removal.
  3. Install the knock sensor pigtail into the retaining clips. Ensure that the pigtail does not contact any moving parts.
  4. Install the accessory mounting bracket. Refer to Accessory Mounting Brackets Replacement in Engine Mechanical-2.6L and 3.2L.
    5. Fig 2: Locating Electrical Connector To Knock Sensor Pigtail & Bracket
    GM785856Courtesy of GENERAL MOTORS CORP.
  5. Connect the knock sensor pigtail (1) to the electrical connector (2) and bracket.
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