Aspecial 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 removed is to be reinstalled, the threads must have an anti-seize compound applied before the reinstallation.
By BobGM Specialist
01/11/2022