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6D-26
-
1977 PONTIAC SERVICE MANUAL
CAP
H O U S I N G
'
v!P
WASHER
OE AR
CONNECTOR
2420
Fig.
6 0 - 3 2
H.E.I.
Distributor
-
Exploded View
Some 1977 engines will incorporate a magnetic timing
probe hole for use with special electronic timing equipment.
Figure 6D-34 shows a typical magnetic probe hole. Consult
manufacturer's instructions for use of this equipment.
SECONDARY WIRING
The spark plug wiring used with the HE1 system is a
carbon impregnated cord conductor encased in an 8MM
diameter silicone rubber jacket. The silicone wiring will
withstand very high temperatures and also provides an
excellent insulator for the higher voltage of the HE1 system.
The silicone spark plug boots form a tight seal on the plug
and the boot should be twisted 1/2 turn before
removing. Care should also be exercised when connecting
a timing light or other pick-up equipment. Do not force
contacts between the boot and wiring, or through the silicone
jacket. Connections should be made in parallel using an
ada~ter. DO NOT ~ u l l on the wire to remove. Pull on the
book or use a tool designed for this purpose.
SPARK PLUGS
R44TSX, R45TSX, and R46TSX resistor type, tapered
seat plugs with long reach are used in V8 engines except VI
Code " R and
"K",
and in the 151 L-4 (see Fig. 6D-35). The
R43TS and R46TS plugs used in the 140 L-4 and 231 V6
engines are also a resistor type, tapered seat plug with long
C O N N K T T A C H O M E T E R
FROM T H I S
TERMINAL
TO G R O U N D .
(SON T A C H o M n w S
M U S T C O N N E C T FROM
CONNECTOR
THI S
ERMIIUA~ TO
BAT.
T E R M I N A L
E N E R G I Z E R
POM1VE (+).
( C O N N E C T E D TO
SOME T A C H O M r r m S
I G N I T I O N
SWITCH)
M A Y N O T W O R K AT A L L
CONSULT T A C -
HIGH E N E R G Y
MANWAC~JUER.)
I G N I T I O N D I S T R I B U T O R
H O U S I N G
GEAR
Fig.
6 0 - 3 3
140
L-4 H.E.I. Distributor and
Coil
Fig.
6 0 - 3 4 Magnetic
Timing Probe Hole
reach. R46TSX plugs may also be used in the 23 1 V6 engine.
Replace with plug indicated on Emission Tune-up label.
The "R" and " K" VI code V8 engines use R46SZ
resistor type spark plugs with a long reach but they are not
tapered seat plugs.
See Engine Exhaust Emissions Section (6E) for spark
plug application and gap sizes.
Normal or average service is assumed to be a mixture
of idling, slow speed, and high speed operation with some of
each making up the daily total driving. Occasional or
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