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Home >> Buick >> 2008 >> Allure CXL >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 4 (Engine Control System & Fuel System - 5.3L - Introduction (2 Of 2)) >> Repair Instructions >> Heated Oxygen Sensor Replacement - Bank 1 Sensor 1 >> Installation Procedure

Installation Procedure

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IMPORTANT: A special anti-seize compound is used on the HO2S threads. The compound consists of liquid graphite and glass beads. The graphite tends to burn away, but the glass beads remain, making the sensor easier to remove. New or service replacement sensors already have the compound applied to the threads. If the sensor is removed from an exhaust component and if for any reason the sensor is to be reinstalled, the threads must have anti-seize compound applied before reinstallation.
    Fig 1: View Of Bank 1 Sensor 1
    GM1554545Courtesy of GENERAL MOTORS CORP.
  1. If re-installing the old sensor, coat the threads with anti-seize compound P/N 12377953, or equivalent.
    2. NOTE: Refer to Fastener Notice .
  2. Install the bank 1 sensor 1 to the exhaust manifold.

    Tighten:  Tighten the sensor to 42 N.m (31 lb ft).

    3. Fig 2: Identifying Bank 1 Heated Oxygen Sensor 1 Electrical Connector
    GM1554557Courtesy of GENERAL MOTORS CORP.
  3. Connect the bank 1 sensor 1 electrical connector (2).
  4. Install the CPA retainer (1).
  5. Install the intake manifold sight shield. Refer to Upper Intake Manifold Sight Shield Replacement .
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