Heated Exhaust Gas Oxygen (HEGO) sensor - removal and refitting
Note: A new sealing ring will be required on refitting.
Removal
1 Apply the handbrake, then jack up the front
of the vehicle and support it on axle stands
(see “Jacking and Vehicle Support”).
2 Disconnect the battery negative lead.
3 Unclip the wiring and disconnect the sensor wiring plug (see illustration).
17.3 Heated exhaust gas oxygen (HEGO) sensor - 1.4 CFI engine
A Sealing ring
B HEGO sensor
C Sensor shield
4 Remove the sensor heat shield, then unscrew the sensor from the exhaust downpipe, and carefully remove it complete with sealing ring.
Warning: Do not touch the tip of the HEGO sensor.
Refitting
5 Refitting is a reversal of removal, bearing in
mind the following points.
6 Clean the sensor threads, and take care not to touch the tip of the sensor during the refitting procedure.
7 Use a new sensor sealing ring.
8 Tighten the sensor to the specified torque.
9 On completion, start the engine and check for leaks between the sensor and the exhaust downpipe.
See also:
Exhaust manifold - removal and refitting
2.0 litre SOHC models
1 Refer to Chapter 4 Part A, Section 26, but
note the following points.
2 Ignore the references to removal and
refitting of the air cleaner and hot air pick-up
pipe, and not ...
Throttle valve control motor - removal and refitting
Removal
1 Disconnect the battery negative lead.
2 Remove the air cleaner assembly.
3 Disconnect the wiring plugs from the motor
and the throttle position sensor.
4 Remove the screws securing the ...
Crankshaft and bearings - examination and renovation
1 Examine the bearing surfaces of the
crankshaft for scratches or scoring and, using
a micrometer, check each journal and
crankpin for ovality. Where this is found to be
in excess of 0.0254 mm (0. ...
