1973 OPEL GT-R ignition

6G- 68 1973 OPEL SERVICE MANUAL
SPECIFICATIONS
TUNE-UP SPECIFICATIONS AND ADJUSTMENTS
Voltage Regulator
Voltage Regulator Setting in Volts at2500 Engine RPM. . . . . . . . . . . . . . . . . . . . . .14+.5
Ignition Coil
Ignition Coil Current Draw, Amperes at 12.5 Volts
Engine Stopped
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . . . .3.8
EngineIdling. . . . . . . . . . . . . . . . . .._.....................................................................\
........................... 2.3
Total Advance (Centrifugal and Vacuum), Engine Degrees at 3600 Engine \
RPM......29-38
Centrifugal Advance, Engine Degrees and RPM
Start Advance, atRPM
........................................................................\
................ 1000-1200
Medium Advance, Degrees at RPM..............................................................7.5-15 at 1400
Maximum Advance, Degrees at RPM
..........................................................28-32 at 3600
Vacuum Advance, Engine Degrees and In. of Vacuum Start Advance..
........................................................................\
.................-5at2.9-4.1 In.
Maximum Advance..........................................................................\
........1-5at4.5-5.0In.
Vacuum Retard, Engine Degrees at Closed Throttle............................................................-5
Condenser Capacity in
MicroFarads........................................................................\
.......23-.32
Breaker Spring Tension in Ounces........................................................................\
......14 to 19
Breaker Point Gap in Inches
........................................................................\
......................,016
Dwell AngleinEngine Degrees........................................................................\
.......... 50+3
Firing
Order........................................................................\
............................................l-3-4-2
Spark Plug or Coil Cable,Max.Resistance in Ohms
..................................................
10,000
Spark Plugs
Make and Model Production........................................................................\
............AC42FS
Make andModel
-Replacement........................................................................\
..........AC42FS
If carbon fouling occurs, use
........................................................................\
............AC43FS
Spark Plug Torque in
Lb.Ft.........................................................................\
.........................30
Spark Plug Gap in Inches........................................................................\
..........................,030
Valve Lifter Adjustment
One full turn (clockwise) after zero clearance is obtained - refer to Valve Adjustment
Procedure
Ignition Timing
Align timing marks with distributor retard hose disconnected and plugged\

RADIO - GT9c. 107mer screw and rotate screw until maximum volume
is achieved.
MAJOR REPAIR
REMOVING AND INSTALLING RADIORemoval
1.
Disc&ect battery.
2. Remove access trim plug from right side of con-
sole. See Figure
9C-1.Figure
9C-3 Location of Access Trim Cover3. Using a 8mm socket, remove hex head screw. See
Figure
9C-2.4. Remove access trim cover on left side of console.
See Figure
9C-3.5. Using a 4mm socket, remove
hex head screw. See
Figure
9C-4.6. Remove tear lock bolts by first,drilling a 3/16 inch
pilot hole and, using a
l/4 inch bolt extractor,
remove bolts. See Figure
9C-5.Figure
9C-5 Drilling Pilot HoleIn\, Tear Lock Bolts7. Disconnect ignition (white) and direction signal
(black) wire set plugs.
8. Support steering column assembly and remove
both hex head bolts.
9. Disconnect speedometer
cabI&10. Remove 6 instrument cluster retaining screws.
See Figure
9C-6.Figure SC-4 Location of Hex Head Screw and Flasher
UnitFigure SC-6 Removing Instrument Cluster Retaining
screws

9C-108 1973 OPEL SERVICE MANUAL
11. Grasp instrument cluster and pull straight back,
being careful of wires, etc. See Figure 9C-7.
Figure 9C-7 Removing Instrument Cluster
12. Disconnect radio harness plug and antenna lead-
in cable from back of radio. See Figure
9C-8.
Figure 9C-8 Removing Radio Harness Plug
13. Remove radio knobs from radio.
14. While supporting radio, remove radio shaft re-
taining nuts. Remove radio. See Figure
9C-10.
CAUTlOk Fasteners in Installation are important at-
taching parts in that they could affect the perform-
ance of vital components and systems, and/or could
result in major repair expense. They must be re-
placed with one of the same part number or with an equivalent part, if replacement becomes necessary.
Do not use a replacement part of lesser quality or
substitute design. Torque values must be used
as
specified during reassembly to assure proper
reten;
tion of these parts.
Figure SC-10 Removing Radio Shaft Retaining Nuts
1. Install radio into instrument cluster and secure
with retaining nuts. See Figure
9C-10.
2. Plug radio harness and lead-in cable into radio.
See Figure
9C-8.
3. Install radio knobs and carefully push cluster back
into instrument panel housing, making sure electri-
cal wires, etc., are not pinched. See Figure
9C-7.
4. Install six (6) cluster retaining screws. See Figure
9C-6.
5. Support column assembly and install ground wire
and hex head bolts, torquing to
14 lb.ft.
6. Install NEW tear bolts and tighten until head of
bolt is twisted off.
7. Connect ignition and directional signal wire plugs.
8. Connect speedometer cable.
9. Install flasher unit and hex head screw. See Figure
9c-4.10. Install hex head screw through opening on right
side and install trim plug. See Figure
9C-2.
11. Install trim cover on left side. See Figure 9C-3.

Subject
Page NumbelSubjectPage Number4.Speed Manual I..
Clutch
Detent Cable Adjustment
:Differential
Directional Signal Switch
Repair Opel 1900 & Manta
Repair GT
:Disassembly of
4.Speed Manual Transmission
DistributorFunction of Valves and Hydraulic Control Units
Opel
3.Speed Automatic.................
74-21
Fuse Chart..............................lG-56
Fusible Link.............................
lA-8Specifications.
Point Replacement..
..,78-127A-
17c-9148-73E-393E-4878.23
1C-26
1 c-20
GEGas Tank See Fuel Tank
General Specifications
Engine...............................6A-28
Opel 3.Speed Automatic
.................7C-134
Transmission, Manual.,
..................78-33
Clutch...............................7A-7
Body................................ZA-4
Governor Drive Gear
Opel
3.Speed Automatic.................7C-103
Grille
Opel 1900 & Manta.....................8A-7
GT..................................8A-6 Electrically Heated Rear Window
Engine
General Description
Cooling System
Lubrication System
Trouble Diagnosis
Exhaust Manifold
Exhaust System
Removal and Installation
External Oil Leaks,
Opel 3 Speed Automatic
FFast Idle Adjustment
..................
Filter-Engine Oil
......................
Fluid Checking Procedure Transmission
Opel 3Speed Automatic.............
Frame-Opel 1900 & Manta.............
Frame
GT-Opel......................
SWVOOpel Xipeed Automatic...........
Front Suspension
Opel1900&Manta.................
GT..............................
Front Wheel Alignment................
Front Wheel Bearing Adjustment
All Series.........................
Fuel Gauge
Trouble Diagnosis
Opell$OO&Manta...............
GT............................
Fuel Pump Operation..................
Fuel System
Fuel Tank (Opel 1900 & Manta)
.......
Fuel Lines (Opel 1900 & Manta)
.......
Fuel Tank
(GT)....................
Fuel Gauge Tank Unit
(GT)...........
Fuel Lines
(GT)....................
Fuel Tank Removal and Installation....
Cleaning Tank.....................
lH-576A-268-326A-46A-66A-126D-427C-816E-51
oc-77C~Bl2B-826-77c-1003A-23A-23C-223A-4
HHazard Warning Flasher
....................lG-55
Headlamp Aiming
.........................1 F-46
Headlamp Switch
Opel 190.0 & Manta
.....................1 F-46
Headlamp Mechanism GT
..................8A-2
Heater System Opel 1900 &Manta
Trouble Diagnosis
......................9A-11
Description and Operation
................9A-10
Adjustments and Minor Service............9A-12
Removal and Installation
.................9A-12
Specifications..........................$A-16
Heater System GT
Trouble Diagnosis
......................9A-4
Description and Operation
................9A-2
Adjustments and Minor Service
............9A-4
Removal and Installation.................9A-5
Specifications..........................$A-9Horn
Operation.............................lG-54
Hydraulic Operation
Opel
3.Speed Automatic.................7C-64
IIdentification Number Vehicle...............
OA-1ldle.Adjustment
..........................6E-51
Inflation Pressures, Tires.
...................36-62
Ignition Coil
Specifications.
.........................
lC-26Identification, Engine
......................
OA-1Ignition System
Timing...............................
lC-20Instrument Panel Parts Removal