Opel Kadett Owner's Manual page 119

5C•6 Electronic (breakerless) ignition systems
the centre of the cap moves freely, and stands
proud of its holder. Renew the cap if
necessary.
8 If the metal portion of the rotor is badly
burnt or loose, renew the rotor. If slightly burnt
it may be cleaned with a fine file.
9 Suck on the end of the vacuum unit outlet,
and check that the operating rod moves in as
the suction is applied. Release the suction,
and check that the rod returns to its original
position. If this is not the case, renew the
vacuum unit.
10 Inspect the distributor body and shaft
assembly for excessive side movement of the
shaft in its bushes. Check that the advance
weights are free to move on their pivot posts,
4.4 Ignition module securing screws
(arrowed)
and that they return under the action of the
springs. Check the security of all the
components on the distributor shaft, and
finally check for wear of the lug on the drive
coupling.
11 Reassembly of the distributor is the
reverse sequence to dismantling, but apply a
few drops of engine oil to the advance weight
pivot posts before refitting the rotor. If a new
ignition module is being fitted, the new
module will be supplied with a small quantity
of silicone grease. This should be applied
between the module and its housing, to
improve heat dissipation.
12 Refit the distributor as described in
Section 3, after reassembly.
4.5 Vacuum unit retaining screws
(arrowed)
4.2 Exploded view of AC Delco breakerless
type distributor - 1.3 litre models
1 Distributor cap
2 Rotor
3 Shaft
4 Pin
5 Drive dog
6 Spring
7 Washer
8 Spring
9 O-ring
10 Body
11 Seal
12 Ignition module
13 Induction sensor
14 Circlip
15 Vacuum unit
16 Plug to coil
4.3 Disconnecting an electrical plug from
the ignition module
1.6 litre (16SH engine) and 1.8 litre
(18E engine) models
13 Remove the distributor as described in
Section 3.
14 Pull off the rotor arm, and unclip the flash
shield (see illustration).
15 Although the top bearing plate can be
removed after undoing its retaining screws,
this is of academic interest, since no spare
parts are available, neither are there any items
requiring adjustment.
16 The vacuum unit can be renewed
separately if required. Remove it by undoing
the two retaining screws and unhooking the
operating arm from the baseplate (see
illustrations). Note that the screws are not of
equal length; the longer screw also secures
one of the distributor cap clips.
17 Test the vacuum unit, as described in
paragraph 9.
18 Inspect the distributor cap and rotor, as
described in paragraphs 7 and 8.
19 Reassemble the distributor in the reverse
order to that followed when dismantling.
Make sure that the vacuum unit operating arm
is correctly engaged with the peg on the
baseplate; several attempts may be needed to
reconnect it.
20 Refit the distributor as described in
Section 3, after reassembly.