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HOMESERVICE MANUALSCHEVROLET2008HHR LT, 2.4 P, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 51 (ENGINE CONTROL SYSTEM & FUEL SYSTEM - 2.4L - INTRODUCTION (2 OF 2))REPAIR INSTRUCTIONSHEATED OXYGEN SENSOR 2 REPLACEMENTINSTALLATION PROCEDURE
2008 Chevrolet HHR LT, 2.4 P, Automatic

Installation Procedure

2008 Chevrolet HHR LT, 2.4 P, AutomaticSECTION Installation Procedure
WARNING: This page is about a different car, the 2008 Pontiac G5 and 2008 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: A special anti-seize compound is used on the heated oxygen sensor threads. The compound consists of a liquid graphite and glass beads. The graphite will burn away, but the glass beads will remain, making the sensor easier to remove. New or service replacement sensors will have the compound applied to the threads. If a sensor is removed and is to be reinstalled, the threads must have an anti-seize compound applied prior to installation.
    Fig 1: Identifying HO2S
    GM1650820Courtesy of GENERAL MOTORS CORP.
  1. If necessary, coat the threads of the HO2S with anti-seize compound GM P/N 12377953 or Saturn P/N 21485279 or equivalent.
    2. NOTE: Refer to Fastener Notice .
  2. Using the J 39194-C  , install the HO2S.

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

    3. Fig 2: Identifying Wheel Drive Shaft Heat Shield
    GM1650818Courtesy of GENERAL MOTORS CORP.
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.