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Home >> Saturn >> 2007 >> Relay 3.9 1 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - Introduction (2 Of 2) >> Repair Instructions >> Heated Oxygen Sensor 1 Replacement >> Installation Procedure

Installation Procedure

IMPORTANT: A special anti-seize compound is used on the HO2S threads. The compound consists of liquid graphite and glass beads. The 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: Removing/Installing HO2S 1
    GM1087793Courtesy 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 HO2S to the exhaust manifold.

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

    3. Fig 2: View Of Generator And Engine Harness Electrical Connectors
    GM1679874Courtesy of GENERAL MOTORS CORP.
  3. Connect the engine harness electrical connector (4) to the HO2S connector.
  4. Install the CPA retainer.
  5. Install the HO2S electrical connector to the ignition coil bracket.
  6. Lower the vehicle.
  7. Install the intake manifold cover. Refer to Intake Manifold Cover Replacement .
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