247319 Removing and installing oxygen sensor behind catalytic converter on DFI engines

WM 247319 Removing and installing oxygen sensor behind catalytic converter on DFI engines

Tools









Technical values






Preliminary work

1. Remove primary catalytic converter. -> 267619 Removing and installing primary catalytic converter on V8 4.8-litre DFI engines - section on "Removing" 267619 Removing and installing primary catalytic converter on 4.8-litre V8 DFI engines

Removing oxygen sensor behind catalytic converter

CAUTION

The oxygen sensor cable can be damaged if twisted.

- Change in emissions.
- Check Engine light comes on.

-> Always expose oxygen sensor cable so that the wire can turn when unscrewing or screwing in the sensor.
-> Do not kink cable.

1. Carefully unscrew oxygen sensors at the primary catalytic converter.

Installing oxygen sensor behind catalytic converter

1. Grease thread of oxygen sensors with Optimoly Paste MF (000 043 207 07) before fitting them. Make sure that the paste does not get into the slits in the sensor body
2. Position the oxygen sensor by hand and screw in as far as possible.
3. Tighten oxygen sensor using special tool (e.g. open-end/ring wrench Nr.98 ). => Tightening torque: 45 Nm (33 ftlb.)+/-5 Nm (+/-3.5 ftlb.)





Special tools for oxygen sensors






Subsequent work

1. Install primary catalytic converter. -> 267619 Removing and installing primary catalytic converter on V8 4.8-litre DFI engines - section on "Installing" 267619 Removing and installing primary catalytic converter on 4.8-litre V8 DFI engines.