Daewoo Nubira User Manual page 592

DAEWOO V–121 BL4
ENGINE CONTROLS 1F – 389
OXYGEN SENSOR
Removal Procedure
1. Disconnect the negative battery cable.
Notice : The oxygen sensor (O2S 1) uses a permanently
attached pigtail and connector. This pigtail should not be
removed from the O2S 1. Damage or removal of the pigtail
or the connector could affect proper operation of the O2S
1. Take care when handling the O2S 1. Do not drop or
damage the O2S1.
2. Disconnect the O2S 1 connector.
Notice : The oxygen sensor may be difficult to remove
when the engine temperature is below 118?F (48?C). Ex-
cessive force may damage the threads in the exhaust
manifold.
3. Carefully remove the O2S 1 from the exhaust man-
ifold.
Installation Procedure
Important : A special anti–seize compound is used on the
O2S 1 threads. This compound consists of a liquid graph-
ite and glass beads. The graphite will burn away, but the
glass beads will remain, making the sensor easier to re-
move. New or service sensors will already have the com-
pound 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.
1. Coat the threads of the O2S with an anti–seize
com–pound, if needed.
2. Install the O2S into the exhaust manifold.
Tighten
Tighten the oxygen sensor to 41 NSm (30 lb–ft).
3. Connect the O2S connector.
4. Connect the negative battery cable.
HEATED OXYGEN SENSOR
Removal Procedure
1. Disconnect the negative battery cable.
2. Disconnect the electrical connector.