Exhaust gas oxygen (HEGO) sensor (2.0 litre DOHC/1.6 & 1.8 litre (R6A type) CVH) - removal and refitting
Note: Do not touch the tip of the HEGO sensor as this will drastically shorten its service life.
Note: A new sealing ring should be used on refitting.
Removal
1 Ensure that the engine and the exhaust
system are cold.
2 Disconnect the battery negative lead.
3 Apply the handbrake, then jack up the front of the vehicle, and support it securely on axle stands (see “Jacking and Vehicle Support”).
4 Disconnect the sensor wiring plug halves by releasing the locktabs and pulling on the plug halves, not the wiring.
5 Where fitted, slide the heat shield from the sensor (see illustration).
35.5 Sliding the heat shield from the exhaust gas oxygen sensor
6 Unscrew the sensor from the exhaust downpipe, and recover the sealing ring. Do not touch the tip of the sensor if it is to be refitted.
Refitting
7 Commence refitting by ensuring that the
sensor threads and the corresponding
threads in the downpipe are clean.
8 Refit the sensor using a new sealing ring, and tighten it to the specified torque.
9 Further refitting is a reversal of removal, but on completion start the engine, and check for leaks around the sensor sealing ring.
See also:
Inner gutter weatherstrip (Saloon, Hatchback and Estate models) - removal
and refitting
Removal
1 Open both the front and rear doors to
expose the relevant weatherstrip.
2 Carefully pull the weatherstrip from the
base of the front pillar, taking care to release
the flap which is stu ...
Hydraulic system - bleeding (anti-lock braking system)
Note: Before starting work, refer to the
warning at the beginning of Section 11
concerning the dangers of hydraulic fluid.
1 On cars equipped with the anti-lock braking
system there are two bleed ...
Camshaft and cam followers - removal, inspection and refitting
Note: A new camshaft oil seal and new rocker
arm securing nuts should be used when
refitting.
1.8 litre (R2A type)
Removal
1 Remove the cylinder head.
2 Unscrew the securing bolts and remove the ...