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Home >> Hummer >> 2009 >> H3 Alpha >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Engine Controls And Fuel - 3.7L - Introduction) >> Repair Instructions >> Heated Oxygen Sensor Replacement - Sensor 1 >> Installation Procedure

Installation Procedure

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NOTE: 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 service sensors already have the compound applied to the threads. If you remove an oxygen sensor and if for any reason you must install the same oxygen sensor, apply the anti-seize compound to the threads before reinstallation.
    Fig 1: View Of HO2S - Position 1
    GM1352009Courtesy of GENERAL MOTORS CORP.
  1. Coat the threads of the HO2S with the anti-seize compound P/N 5613695, or equivalent if necessary.
    2. CAUTION: Refer to Component Fastener Tightening Caution .
  2. Using the J-39194-B:  wrench, install the HO2S into the exhaust manifold and tighten to 42 N.m (31 lb ft).
    3. Fig 2: View Of ECT Sensor, Fuel Injector, Ignition Coil & HO2S Engine Wiring Harness Electrical Connectors
    GM1350694Courtesy of GENERAL MOTORS CORP.
  3. Connect the HO2S electrical connector (5) to the following:
    • The engine wiring harness electrical connector
    • The camshaft cover
  4. Install the right front fender wheelhouse panel. Refer to Front Wheelhouse Liner Replacement .
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