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Home >> Buick >> 2009 >> Lucerne CX, 3.9 1 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 3.9L - Introduction >> Repair Instructions >> Knock Sensor Replacement - Bank 1 >> Installation Procedure

Installation Procedure

CAUTION: Refer to Fastener Caution .
NOTE: DO NOT apply thread sealant to the sensor threads. The sensor threads are coated at the factory. Applying additional sealant affects the sensors ability to detect detonation.
    Fig 1: Removing/Installing Knock Sensor
    GM1587771Courtesy of GENERAL MOTORS CORP.
  1. Install and tighten the knock sensor (1).

    Tighten:  Tighten the sensor to 25 N.m (18 lb ft).

    2. Fig 2: Identifying Electrical Connectors
    GM1612884Courtesy of GENERAL MOTORS CORP.
  2. Connect the knock sensor electrical connector (1).
  3. Install the catalytic converter. Refer to Catalytic Converter Replacement (V8) .
  4. Lower the vehicle.
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