Chapter 5 Engine electrical systems
8.8a Before removing the distributor, paint or scribe an
alignment mark on the edge of the distributor base directly
beneath the rotor tip - DO NOT use a lead pencil
while thedistributorisoutoftheengine, orthealignmentmarks willbeuse-
less.
8 Detach the primary wiring from the distributor.
Ins talla tion
Note: If the crankshaft has been moved while the distributor is out, the
’ numberonepiston must be repositionedat TDC. This can be done byfeel-
ing for compression pressure at the number one plug hole as the crank-
shaft is turned. Once compression is feelt, align the TDC marks on the
drivebelt pulley and the timing cover.
9 Insert the distributor into the engine in exactly the same relationship to
the block that it was in when removed.
10 To mesh the helical gears on the camshaft and the distributor, it may
be necessary to turn the rotor slightly. Recheck the alignment marks be-
tween the distributor base and the block to verify that the distributor is in
the same position it was in before removal. Also check the rotorto see if it’s
aligned with the mark you made on the edge of the distributor base.
11 Loosely install the nut.
12 Reconnect the electrical leads.
13 Install the distributor cap.
8.8b Also paint an alignment mark on the engine and the
distributor base to ensure the correct timing after the distributor
is installed
14 Reattach the vacuum line(s) to the advance unit (if equipped).
15 Reattach the spark plug wires to the plugs (if removed).
16 Connect the cable to the negative terminal of the battery.
17 Check the ignition timing (see Chapter 1) and tighten the distributor
hold-down nut securely.
9 Centrifugal advance assembly - check and replacement
Refer to illustrations 9.7a, 9.76, 9.7c, 9.7d, and 9.7e
1 Detach the vacuum line(s) from vacuum advanoe unit on thedistribu-
tor and plug them.
2 Connect a timing light according to it’s manufacturer’s instructions.
3 Start the engine.
4 While watching the timing marks with the use ofthe timing light, raise
the engine speed while watching the timing marks advance.
5 ,The timing should advance smoothly.
6 If the timing does not advance smoothly, check the advance weights,
springs and plate for damage or binding.
7 Replace parts as needed (see illustrations).
9.7a An exploded view of the
distributor on 1983 models
1
Cap
2 Contact carbon
3 Rotor assembly
4 Centrifugal advance spring
5 Centrifugal advance plate
6 Centrifugal advance weight
7 Centrifugal advance base
8 Reluctor
9 Pick-up coil
10 Breaker plate
11 Plate
12 Vacuum control unit
13 E-ring
14 Washer
15 Shaft
16 Ball bearing
17 Oil seal
18 Housing
19 Oilseal
20 O-ring
21 Spring pin
22 Drive gear
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