Installation Procedure

Fig 1: Heated Oxygen Sensor 2

Courtesy of GENERAL MOTORS CORP.

IMPORTANT: A special anti-seize compound is used on the oxygen sensor threads. This 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 sensors will already have the compound applied to the threads. If a sensor is removed from any engine and if for any reason it is to be reinstalled, the threads must have anti seize compound applied before reinstallation.

Coat the threads of the HO2S2 with an anti-seize compound, if needed.
Install the HO2S2 (1) into the exhaust manifold.
Tighten: Tighten the HO2S1 to 40 N.m (29.5 lb ft).
Connect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection .