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:
Coolant pump - removal and refitting
1 Disconnect the battery negative lead.
2 Drain the cooling system.
3 Proceed as follows according to model:
SOHC models
4 Disconnect the heater and radiator bottom
hoses from the coolant pump.
...
Engine dismantling, examination, renovation and reassembly - general
information
Dismantling
1 Refer to Chapter 2, Part A, Section 18,
paragraphs 1 to 8 inclusive.
2 A suitable selection of splined and Torx
sockets will be required to remove many of
the bolts when dismantling ...
General information
All models utilise a light alloy inlet manifold
which on carburettor models is coolant
heated to improve the atomisation of the
fuel/air mixture.
The exhaust manifold is of cast iron
construction ...
