Distributor Holddown Clamp; Magnetic Timing Probe Socket And Timing Degree Scale; Secondary Wiring - Jeep J-10 Series 1982 Technical & Service Manual

Table of Contents

Fig. 1G-4 Distributor Holddown Clamp

timing probe socket. Consult the manufacturer's in

structions for use of this type equipment.

Ignition Coil

The ignition coil is oil filled and hermetically sealed. It

has two windings wound on a soft iron core. The func

tion of the ignition coil is to transform the battery volt

age applied to the primary circuit to high voltage for the

secondary circuit.

The ignition coil does not require special service other

than maintaining the connector terminals clean.

Secondary Wiring

The spark plug wiring used with the HEI system is a

carbon impregnated cord conductor encased in an

0.3125-inch (8 mm) diameter silicone rubber jacket. The

silicone rubber jacket will withstand very high temper

atures and also provides an excellent insulator for the

higher voltage provided by the HEI system. The silicone

rubber spark plug boots form a tight seal around the

IGNITION SYSTEMS 1G-3

MAGNETIC TIMING PROBE SOCKET

VIBRATION DAMPER

MAGNETIC TIMING

PROBE SOCKET

Rg. 16-5 Magnetic Timing Probe Socket and Timing Degree Scale

plug. The boot should be twisted 1/2 turn before re

moving. Care should also be exercised when connecting

a timing light or other test equipment. Do not force

anything between the boot and wiring or through the

silicone rubber jacket. Connections should be made in

parallel using an adapter. DO NOT pull on the wire to

remove. Pull on the boot or use a tool designed for this

Resistor type, tapered seat spark plugs are used (fig.

1G-6). No gasket is used with tapered seat plugs. Refer

to figure 1G-7for an explanation of the spark plug code.

Rg. 1G-6 Tapered Seat Spark Plug

Troubleshooting