1973 OPEL GT-R brake

9C-106 1973 OPEL SERVICE MANUAL
c. Adjust trimmer screw for maximum volume.
d. If antenna trimmer does not have a definite peak, check for defective antenna by substitution.
2. Check that the speaker connection is plugged in
SXUdY.
3. If the radio is still weak, remove the receiver and
speaker assembly for repair.
Radio Is Noisy
1. Radio is noisy all the time:
a. Check for defective antenna by striking antenna
with hand. If static is heard while tapping, replace
antenna.
b. If antenna is not defective, remove receiver and
speaker for repair.
2. Radio is noisy only when jarred:
a. Check antenna as in Step No. 1 above.
b. Check speaker connection. If speaker connection is not at fault, remove receiver and speaker for re-
pair.
3. Radio is noisy when engine is running:
a. Check noise suppressor by substituting on genera-
tor with known good one.
b. Check to see that antenna is mounted securely,
grounding the antenna base to the fender. The an-
tenna lead-in wire is shielded and the shield should
have good ground connection at the receiver and the
antenna base.
c. Check for other car wiring, passing too close to
radio receiver case.
d. If engine noise is still present, remove receiver and
speaker for repair.
4. Radio is noisy when car equipment is operated,
such as directional lights or brake lights:
Check for defective antenna lead-in wire or, loose
antenna mounting, as in Step No. 3b above.
MAINTENANCE AND ADJUSTMENTS
ANTENNA TRIMMER ADJUSTMENT
An antenna trimmer adjusment screw is provided for
matching of the antenna coil in the receiver to the car antenna. This adjustment must always be made after
installation of a receiver or an antenna, or after re-
pair to these units. This adjustment should also be
performed whenever radio reception is unsatisfac-
tory.
1. Position antenna to a height of 31 inches.
2. Tune receiver
tb a weak station at or near 1400
KHz that can barely be heard
with volume turned
fully up.
3. Insert a small-bladed screwdriver in antenna trim-
Figure 9C-1 Location of Access Trim Plug
Figure
9C-2 Removing Hex Head Screw

9C-110 197j 6PEi SERVICE MANUAL
c. Adjust trimmei screw for maximum volume,
d. If antenna trir&ner does not have a definite peak,
check for defective ant&ma by substitution.
2. Check that the speaker connection is plugged in
securely.3. If the radio is still weak, remove the receiver and
speaker assembly for repair.
Radio Is Noisy1. Radio is noisy all the time:
a. Check for defective antenna by striking antenna
with hand. If static is heard while tapping, replace
antenna.
b. If antenna is not defective, remove receiver and
speaker for ripair.
2. Radio is noisy only when jarred:
a. Check antenna as in Step No. 1 above.
b. Check speaker connection. If speaker connection
is not at fault, remove receiver and speaker for re-
pair.
3. Radio is noisy when engine is running:
a. Check noise suppressor by substituting on genera-
tor with known good one.
b. Check to see that antenna is mounted securely,
grounding the antenna base to the fender. The an-
tenna lead-in wire is shielded and the shield should
have good ground corinection at the receiver and the
antenna base.
c. Check for other car wiring passing too close to
radio receiver case.
d. If engine noise is still present, remove receiver and
speaker for repair.
4. Radio is noisy when car equipment is operated,
such as directional lights or brake lights:
Check for defective antenna lead-in wire or loose
antenna mounting, as in Step No. 3b above.
5. Radio is noisy only on dry days when car is mov-
ing:
Wheel and tire static will occur only during dry
weather. To check to see if noise is wheel static or tire
static, drive car until noise is noticed. Touch the
brake. If noise disappears, it is wheel static. If noise
persists, it is tire static. Static may be eliminated in
two ways:a. Wheel static may be eliminated by installation of
static collectors in the front wheels. It is important
to make sure the button on the end of the spiral
collector rides evenly in the spindle. Grease and dirt
can cause poor contact between static collector and
the cap, which would result in wheel static, even with
the collectors installed.
b. Tire static is eliminated by injecting graphite tire
static powder in all
five (5) tires. Either a special gun
or a plastic squeeze bottle can be used to insert pow-
der.MAINTENANCE AND ADJUSTMENTS
ANTENNA TRIMMER ADJUSTMENTAn antenna trimmer adjustment screw is provided
for matching of the antenna coil in the receiver to the
car antenna. This adjustment must always be made
after installation of a receiver or an antenna, or after
repair to these units. This adjustment should also be
performed whenever radio reception is unsatisfac-
tory.1. Position antenna to a height of 31 inches.
2. Tune receiver to a weak station at or near 1400
KHz that can barely be heard with volume turned
fully up.
3. Insert a small-bladed screwdriver in antenna trim-
mer screw and rotate screw until maximum volume
is achieved.
Figure 9C-15 Radio Control Knobs

SubjectPage Number
Subject Page Number
A
Air Conditioning Refrigerant Components .................
98.17
Opel 1900
& Manta-In Car Components .....9B-90
GT.ln Car Components..................98-97
Alignment Opel 1900
& Manta .....................3C-22
GT-Opel ..............................
3C-22
Alternator Description ...........................
lD-28
Specifications. .........................1 D-35
Overhaul K-l..........................lD-30
Removal & Installation ..................lD-30
Testing...............................lD-29
Wiring Diagrams
Manta .............................
1 J-105
Opel 1900
..........................lJ-103
GT ................................
lJ-107
AM
Radio-GT............................9C-105
AM Radio-Opel 1900 &Manta ...............
9C-109
Antenna, Installation .......................
9C-111
Antenna Trimmer .........................
9C-110
Assembly of Transmission from Major Units Manual ...............................
78-23
3 Speed Automatic .....................
7C-103
Axle,
R&r, Disassembly ....................48~11
Bolt Torque Specifications
Engine ...............................
6A-27
Transmission. Manual ....................
78-33
3 Speed Automatic .....................
7C-136
Clutch ...............................
7A-7
Body ................................
2A-4
Brakes
Brake Drum, Shoes & Linings .............5C-28
Hydraulic Wheel Cylinder ................
5C-30
Hydraulic Master Cylinder ................
5A-2
Parking Brake Cables .....................
5C-33
Standard Brakes ........................
X-22
Disc Brakes...........................5B-10
Brake Booster and Vacuum
Coritrol Valve ....5A-5
Bumpers, Front and Rear ...................
ZH-33
C
B
Balance,,Wheel and Tire....................3G-62
Ball
J&tUpper .........................3A-7
Lower ...............................
3A-7
Battery
Specifications ..........................
lA-9
Testing...............................lA-6
Charging ..............................lA-9
Trouble Diagnosis ......................lA-4
Battery Test 421.........................l A-6
Belt Tensions ............................
68.33
Blower and Air Inlet Assembly, Removal and Installation
Owl 1900&Manta.....................9A-15
GT
.: ................................9A-5
Body Name Plate ............................
OA-1
Style’Numbers ......................... OA-2
Windows and Weatherstrips ...............
ZC-9
Doors ................................
ZD-13
Interior Trim and Headlining ..............
26-33
Seatsi................................26-33
Roof&d Sunroof-Opel 1900
& Manta ......2F.24 Camshaft,
1.9L
Engine .....................6A-25
Car Model Identification .......
.,............OA-1
Carburetor..............................6E-44
Trouble Diagnosis ......................
6E-49
Description ...........................
6E-44
Overhaul .............................
6E-53
Adjust ...............................
6E-50
Removal
& Installation ......,............6E-52
Specifications ..........................
6E-58
Charging
System
Description ..............
:............ 1 D-28
Specifications. ............
.,............lD-35
Testing..................:............lD-29
Wiring Diagrams
Manta .............................
lJ-105
Opel 1900 ..........................
lJ.103
GT ................................
lJ-107
Chart Lubrication ........................ OC-5
Chassis Springs, Front. ........
!............3A-15
Clutch, Second-Automatic Transmission .......
7C-103
Clutch Adjustment .........................
7A-4
Control Arm Front Upper ...................
:............3A-10
Lower ...............................
3A-11
Converter Checking Procedure ................
7C-125
Coolant Flow ............................
68-32
4 Speed Manual Transmission ...
!,...........7B-12
Cranking System. See Starting
SyStem
Crankshaft..............................6A-16
Cylinder Head ...............
:............6A-12
D
Description
3.Speed Automatic.....................7C-37

SubjectPage Number
Subject Page Number
o,,e, 1900 & Manta .....................1H-59
GT..................................lH-63
intake Manifold, 1.9L Engine
..........:.....6A-12
R
Radiator
JRadiator All Models .,.
Radio
66-32
Joint,
Ball
adder.; ...............................3A-7
dower...............................3A-7
K
Antenna Trimmer Adjustment GT
Antenna Trimmer Adjustment
Opel 1900
& Manta
Removal and Installation Opel 1900
& Manta
Removal and Installation GT
Trouble Diagnosis GT
.,.
Trouble Diagnosis -Opel 1900 &Manta
Reverse Clutch
Rings, Piston,
1.9L Engine
Rocker Arm Assembly.
1.9L Engine..
9C-1 06
9C-1 10
Keys and Locks ..........................OA-1
L
Low Servo Cover .........................7c-100
Lubrication
Engine Oil Change Interval ................OC-7
Oil Viscosity Chart. .....................
OC-7
Fluid Capacities........................OC-5
Lubrication System, Engine .................6A-4
9C-1 11
9c-107
9c-105
9c-109
7c-103
6A-19
6A-12
s
M
Mainshaft Assembly 4.Speed
Manual Transmission ....................
78-26
Manifold
Intake ...............................
6A-12
Exhaust ..............................
6A-12
Master
Cdlinder, Brake.....................5A-2
Model
D&ignation (Body Style)
.............. OA-2
Mountings. Engine, GT ....................
28-6
Opel 1900 & Manta
.......................28-6
0
Oil Chan& Interval ........................OC-7
Oil Filter: Engine
.........................OC-7
Oil Flow Circuits, Automatic Transmission .....7C-64
Oil
Pan. Engine ..........................6A-10
Oil Pump Engine.........................
6A-26
Oil Pump Transmission ....................
7C-103
Oil Recommendations Engine. ..............
OC-7
Oil Strainer-Transmission..................7C-99
Oil Viscosity Chart ........................
OC-7
Opel Emission Control System
(OECS)
Specifications..........................6F-64
Service Procedures......................6F-63
Trouble Diagnosis ......................
6F-62
P
Parking Brake............................5C-33
Piston, Pin Rings ..........................
6A~lS
Planetary Gear Set ........................
7C-118
Power Unit Brake ........................
5A-5
Propeller Shaft ...........................
4A-2
Pump, Oil Engine........................
6A-26 Sequence for Transmission Diagnosis
..........
7C-81
Service ProceduresClutch..................7A~5
Shift Linkage Adjustments
4.Speed Manual ........................78-19
3.Speed Automatic .....................7C~93
Shock Absorber, Rear
All Series .............................
3F-51
Spark Plug Specifications ...........................
66-68
Clean &Adjust. ........................
lC-22
Installation............................lC-22
Wires................................lC~21
Specifications
Engine ................................
6A-27
Front Wheel Alignment ....................
3C~22
Speedometer Installation
Opel1900&Manta.....................1 l-68
GT..................................11-70
Spring
Rear SuspensionAll Series ..............
:............3F-52
Front Suspension
Opel 1900
& Manta ...................3A~l6
GTO Opel ..........................
3A15
Starting Motor
Description ............................
1 E-1 0
Specifications .............:............1 B-1 7
Repairs
..................:............18-13
Removal..............................1 B-l 3
Steering Columns
Service Procedures -Opel 1900 &Manta ....
3E-36
Service Procedures
- GT ...._............3E-44
Steering Gear Adjustment. .....
:............3D-27
Steering Gear Disassembly and
Redssembly.....3D-30
Steering Gear Removal and Install&ion ........
30-28
Steering Linkage ..........................
38-19
Suspension
Front................................3A-2
Rear .................................
3F-51
,