Oxygen Sensor - Torque Specifications

18-45
Amended
6/97

DATE 2/95

MODEL
1995-96 MY XJS (4.0) Range

VIN
194775-226645

Heated Oxygen Sensor (HO2S) - Torque Specification

Remove and destroy Bulletin 18-45, dated 2/95.
Replace with this Bulletin.
Revisions are marked with a bar and asterisks.

ISSUE:

The tightening torque for the heated oxygen sensors (HO2S) fitted to all 4.0L 1995-96 MY XJS vehicles is *12.5 +/- 1.5 lb ft (17 Nm +/- 2 Nm).*

ACTION:

When installing an HO2S in all 1995-96 MY (4.0L) XJS vehicles, DO NOT EXCEED *14 lb ft (19 Nm)* TORQUE or internal damage to the sensor will result.

The female thread in an existing exhaust system can be cleaned using a plug tap 12 x 1.25 mm. When reinstalling a used sensor, wipe the thread clean using care not to contact the delicate tip of the sensor. Apply a light coat of an anti-seize compound to the thread of the sensor and start the thread by hand. New sensors come coated with an anti-seize compound. Final tightening requires a 17 mm socket.

NOTE:
If an HO2S is relocated for diagnostic purposes, it must be reoriented using the PDU.