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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) 1 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. 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.
    Fig 1: Identifying Knock Sensor On Engine
    GM21520Courtesy of GENERAL MOTORS CORP.
  2. Install the knock sensor (1) on to the engine block.

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

    3. IMPORTANT: The knock sensor pigtail is guided past the rear timing belt cover by several retaining clips. 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 generator. Refer to Generator Replacement (LA3, LY9) or Generator Replacement (LS6) or Generator Replacement (LY7) in Engine Electrical.
    5. Fig 2: View Of Knock Sensor Pigtail, Knock Sensor Pigtail & Bracket
    GM785857Courtesy of GENERAL MOTORS CORP.
  5. Connect the knock sensor pigtail (1) to the knock sensor pigtail (2) and bracket.
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