4B-8 - THUNDERBOLT IV AND V IGNITION SYSTEM 90-823225--1 1096
IMPORTANT: The rotor should fit very tight. It
may be necessary to heat rotor with torch lamp
to properly install. It is important not to let any
Loctite run down distributor shaft. Loctite could
get into top distributor housing bushing.
12. Reinstall distributor cap on distributor.
13. Install spark plug wires (if removed). Refer to
“Spark Plug Wires” in this section.
Sensor
1. Remove rotor and sensor wheel.
2. Disconnect sensor wires.
3. Remove two screws that hold sensor into distrib-
utor housing. Remove sensor from housing.
72732
b
a
a - Mounting Screws
b - Senor Assembly
4. Use a magnifying glass and light to inspect the
two metal “jumper leads” for cracks. If a crack is
found in either metal “jumper lead,” install a new
sensor.
72733
a
a - Jumper Leads
!
CAUTION
Do not use any type of silicone sealer on the in-
side of the distributor. Most silicone sealers give
off an acidic vapor during the curing stage of the
sealer. This acid can cause corrosion on the igni-
tion components.
5. Install sensor into housing and install two retain-
ing screws.
6. Install sensor wheel, rotor, and distributor cap.
7. Connect WHT/RED and WHT/GRN sensor wires
(ring terminals on engine harness wires, or bullet
connectors from ignition module wires). Tighten
hex nuts securely, if so equipped.
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