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Home >> Hummer >> 2007 >> H3 Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 3.7L - Introduction (2 Of 2) >> Repair Instructions >> Heated Oxygen Sensor 2 Replacement >> Installation Procedure

Installation Procedure

IMPORTANT: Use special anti-seize compound on the HO2S threads. The compound consists of graphite suspended in fluid and glass beads. The graphite burns away, but the glass beads remain, making the sensor easier to remove. New or service sensors already have the compound applied to the threads. If you remove an oxygen sensor and if for any reason you must reinstall the same oxygen sensor, apply the anti-seize compound to the threads before reinstallation.
    Fig 1: View Of HO2S - Position 2
    GM1352010Courtesy of GENERAL MOTORS CORP.
  1. Coat the threads of the HO2S with the anti-seize compound P/N 5613695 or equivalent if necessary.
    2. NOTE: Refer to Component Fastener Tightening Notice .
  2. Using the J 39194-B  , install the HO2S into the catalytic converter. See Special Tools .

    Tighten:  Tighten the HO2S to 42 N.m (31 lb ft).

    3. Fig 2: View Of HO2S Electrical Connector
    GM1363915Courtesy of GENERAL MOTORS CORP.
  3. Connect the HO2S electrical connector (3) to the engine wiring harness connector (1).
  4. Lower the vehicle.
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