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Removal & Installation (3.8L) Except W Body Buick Century VI

Removal & Installation 2 illustrations ~443 words
WARNINGHot engine coolant may cause severe burns. Although the cooling system has been drained, coolant still remains in the engine water jacket. This coolant will drain with the removal of the knock sensor.
  1. Turn OFF the ignition. Drain the cooling system. Raise and support the vehicle. Locate Knock Sensor (KS) to be removed. (Scheme 17)or (Scheme 18). Disconnect the KS electrical connector. Remove the KS.
  2. To install, reverse removal procedure. Tighten the KS to specification. See «TORQUE SPECIFICATIONS»(ref-159248-S05123880852003112000000). Connect the KS electrical connector. Lower the vehicle. Fill the cooling system. See «COOLING SYSTEM BLEEDING»(ref-159248-S27759885322003112000000) under COOLING SYSTEM.

Scheme 17

Scheme 17
Scheme 17

Scheme 18

Scheme 18
Scheme 18
CAUTIONHot engine coolant may cause severe burns. Although the cooling system has been drained, coolant still remains in the engine water jacket. This coolant will drain with the removal of the knock sensor
  1. Raise and support the vehicle. Refer to «JACKING AND LIFTING»(ref-185196) the Vehicle in General Information.
  2. Drain the cooling system. Refer to «DRAINING AND FILLING COOLING SYSTEM»(ref-185217-S17290902112005082800000) in Engine Cooling
  3. Disconnect the knock sensor electrical connector (2).
  4. Remove the knock sensor (1).

Note. Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

IMPORTANTDO NOT apply thread sealant to sensor threads. The sensor is coated at factory and applying additional sealant will affect the sensors ability to detect detonation.
  1. Install the knock sensor (1). Tighten Tighten the knock sensor to 19 N.m (14 lb ft).
  2. Connect the knock sensor electrical connector (2).
  3. Lower the vehicle.
  4. Fill the cooling system. Refer to «DRAINING AND FILLING COOLING SYSTEM»(ref-185217-S17290902112005082800000) in Engine Cooling.
CAUTIONHot engine coolant may cause severe burns. Although the cooling system has been drained, coolant still remains in the engine water jacket. This coolant will drain with the removal of the knock sensor.
  1. Remove the transaxle. Refer to «REMOVAL & INSTALLATION - A/T»(ref-153570) .
  2. Drain the cooling system. Refer to «DRAINING AND FILLING COOLING SYSTEM»(ref-185217-S17290902112005082800000) .
  3. Remove the bolts (2) from the knock sensor heat shield (1).
  4. Disconnect the knock sensor electrical connector (3) from the knock sensor.
  5. Remove the knock sensor (4).

Note. Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

IMPORTANTDO NOT apply thread sealant to sensor threads. The sensor is coated at factory and applying additional sealant will affect the sensors ability to detect detonation.
  1. Install the knock sensor (4). Tighten the knock sensor to 19 N.m (14 lb ft).
  2. Install the knock sensor heat shield. Tighten the bolts to 60 N.m (44 lb ft).
  3. Connect the knock sensor electrical connector.
  4. Install the transaxle. Refer to «REMOVAL & INSTALLATION - A/T»(ref-153570) .
  5. Fill the cooling system. Refer to «DRAINING AND FILLING COOLING SYSTEM»(ref-185217-S17290902112005082800000) .

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