Impala V6-3.9L (2007)
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.
1. If re-installing the old sensor, coat the threads with anti-seize compound P/N 12377953, or equivalent.
Notice: Refer to Fastener Notice.
2. Install the HO2S to the exhaust manifold.
Tighten the sensor to 42 N.m (31 lb ft).
3. Connect the HO2S electrical connector (2).
4. Install the CPA retainer (3).
5. Install the oxygen sensor electrical connector to the ignition coil bracket.
