maintenance OPEL GT-R 1973 Owner's Manual

I2A- 21973 OPEL SERVICE MANUAL
GENERAL INFORlVlATION
CONTENTS
SubjectPage No.
DESCRIPTION AND OPERATION: (Not Applicable)
DIAGNOSIS: (Not Applicable)
MAINTENANCE AND ADJUSTMENTS:
PaintMaintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2A-2
ChromeMaintenance
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2A-2
StainRemoval
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2A-2
MAJOR REPAIR: (Not Applicable)
SPECIFICATIONS:
Bolt
TorqueSpecifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2A-4
Special Body Tools
. . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2A-5
MAINTENANCE AND ADJUSTMENTSPAINT MAINTENANCE
To remove heavy concentrations of road dirt and
grime, it is recommended that the car be washed
using an automotive shampoo or mild soap, and cold
to lukewarm water. Use of harsh soaps or detergents
is not advised. In areas where salt is used on the
roads during the winter months, more frequentwashing is recommended.
Use of cleaners and polishes are required if no high
luster is obtainable by waxing. To protect the paint
finish, sparingly apply several coats of wax. Each
coat should be thoroughly rubbed to remove any
surplus wax.
Once the car is properly waxed, road dirt may easily
be removed by use of cold to lukewarm water and a
sponge. Dry by use of a chamois.
CHROME MAINTENANCE
Chrome parts should be washed with water and a
mild detergent. If rust or salt corrosion should ap-
pear, they may be removed with Buick Rust Eraser
or equivalent. Do not use scouring powders or stiff
brushes.STAIN REMOVAL
Before attempting to remove spots or stains from
upholstery fabrics, determine as accurately as possi-
ble: (1) Nature and age of the spot or stain. (2) The
affect of stain removing agents on the color, struc-
ture and general appearance of the fabric.
For best results, stains should be removed from
upholstery as soon as possible after they have been
made. If they are allowed to stand for some time,
they often become set, and removal becomes more
diffxult and frequently impossible.
There are three basic types of acceptable’ cleaners
available to car owners: (1) Volatile cleaners, (2) Syn-
thetic detergents, (3) Neutral soap (non-alkaline).
The volatile cleaners are recommended since they
have great solvent powers for grease, oils and general
road grime. Synthetic detergents generally loosen
stains satisfactorily, however, the use of improper
type detergents (containing bleach) involves risk of
damage to the color or finish of fabrics.
Precautions For Cleaning FabricsDo not use laundry soap or detergents containing
bleaches. The use of these agents tends to weaken
fabric and to change its color. Do
not use too much
cleaning fluid. Some interior trim assemblies are pad-

2B- 61973 OPEL SERVICE MANUAL
OPEL 1900, MANTA AND GT FRAME ANDBODY
MOUNTINGS
CONTENTS
Subject
DESCRIPTION AND OPERATION: (Not Applicable)
DIAGNOSIS: (Not Applicable)
MAINTENANCE AND ADJUSTMENTS: (Not
Applicable)
MAJOR REPAIR: (Not Applicable)
SPECIFICATIONS:
FrameandBodyMountingSpecifications. . . . . . . . . . . . . . . .Page No.28-6LOWER
I.
1.Ii
NOTE: TOLERANCES
NOTTOEXCEED*1,16I IDATUM LINEZB2
Figure
ZB-2 GT Frame Details

WINDOWS AND WINDOW MOLDINGS2c-9WINDOWS AND WINDOW MOLDINGS
CONTENTS
Subject
DESCRIPTION AND OPERATION: (Not Applicable)
DIAGNOSIS: (Not Applicable)
MAINTENANCE AND ADJUSTMENTS: (Not
Applicable)
MAJOR REPAIR:
Removal and Installation
Windshield
RevealMolding. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Windshield
andBackWindow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DoorWindow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Rear Quarter Window Molding
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Rear Quarter Window
-1900 -Manta. . . . . . . . . . . . . . . . . .RearQuarterWindow
-GT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RearQuarterWindowLock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .SPECIFICATIONS: (Not Applicable)Page No.
2c- 9
2c-10
2c-11
2c-11
2c-12
2c-12
2c-12
MAJOR REPAIR
REMOVAL AND INSTALLATION OF WINDSHIELD3. With Tools J-2 1828 and J-2 1549, insert new reveal
REVEAL MOLDINGmolding and install escutcheon.
1. Remove reveal molding escutcheon. Starting at
one end, pull molding out of rubber channel. See
Figure
2C-2.Figure ZC-2 Removing Reveal Molding
Figure ZC-3 Pushing Windshield Out 2. Prior to installation, place molding in water and
heat up to approximately 113
- 122 degrees F.

DOORS
CONTENTS
Subject
DESCRIPTION AND OPERATION: (Not Applicable)
DIAGNOSIS: (Not Applicable)
MAINTENANCE AND ADJUSTMENTS: (Not
Applicable)
MAJOR REPAIR:
Front Door - Removal and Installation
DoorLockStriker..........................................................
WindowRegulator
Handle..........................................
Trim
Pad............................................................................
DoorHandle.Inside......................................................
RevealMolding................................................................
WindowLifter..................................................................
DoorLockCylinder........................................................
Weatherstrip....................................................................
Door....................................................................................
Rear Door
- Removal and Installation
SashWindow..................................................................
Window Regulator........................................................
TailGate............................................................................
Door....................................................................................
SPECIFICATIONS:Page No.
2D-13
2D-13
2D-13
2D-15
2D-1520-l
5
2D-17
2D-10
20-18
2D-19
2D-20
2D-21
2D-21
MAJOR REPAIRREMOVAL AND INSTALLATION OF DOOR LOCK
STRIKER1. Mark position of old striker on lock pillar and
unscrew striker, using Tool J-23659. See Figure
2D-2.2. Place new striker in installation position and tem-
porarily tighten striker, observing marking on lock
pillar. Close door and check whether this can be
done without exerting any force. If this is not the
case, adjust striker accordingly.
3. Tighten attaching screws, using Tool J-23659, and
check for proper operation.REMOVAL AND INSTALLATION OF WINDOW
REGULATOR HANDLE1. Insert Tool J-7797 between handle and nylon disc.
See Figure
2D-3.2. With the two fork-shaped ends of the tool, slide
lock spring outwards. See Figure
2D-4.3. Place lock spring of new handle in installation
position and install it onto window regulator shaft.
4. With the window in closed position, the window
regulator handle should point upwards towards the
front at an angle of approximately 45 degrees.
REMOVAL AND INSTALLATION OF FRONT
DOORTRIM PAD
1. Remove window regulator handle.

ZE-221973 OPEL SERVICE MANUAL’REAR COMPARTMENT LID
CONTENTS
Subject
DESCRIPTION AND OPERATION: (Not Applicable)
DIAGNOSIS: (Not Applicable)
MAINTENANCE AND ADJUSTMENTS: (Not
Applicable)
MAJOR REPAIR:
Removal and Installation
Weatherstrip
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Lock Cylinder
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LuggageCompartmentLid. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .SPECIFICATIONS: (Not Applicable)Page No.
2E-22
2E-22
2E-23
MAJOR REPAIRREMOVAL AND INSTALLATION OF LUGGAGE
COMPARTMENT LID WEATHERSTRIP
1. Detach old weatherstrip and clean sealing surface.2. Coat new weatherstrip and contacting surface
with rubber cement, and allow cement to dry for a
few minutes.3. Install new weatherstrip with rubber cement. See
Figure
2E-2.REMOVAL AND INSTALLATION OF LUGGAGE
COMPARTMENT LID LOCK CYLINDER
Removal
1. Remove luggage compartment lid lock. See Figure
2E-3.Figure
ZE-2 installing Luggage Compartment Lid2. With luggage compartment lid in almost horizon-Weatherstriptal position, unscrew lock cylinder nut, using a 13/16Figure
2E-3 Lid Lock Attaching Screws

2F-241973 OPEL SERVICE MANUAL
ROOF AND SUN ROOF
CONTENTS
,.,Subject
DESC,RIF?TION AND OPERATION: (Not Applicable)
DIAGNOSIS: Sun Roof Diagnosis
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . . . . . . . . . . . . . . . . . . . .
MAINTENANCE AND ADJUSTMENTS:Sun Roof Height Adjustment
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . .
MAJOR REPAIR:
Removal and Installation
Sun Roof Panel andFrame. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . .
Velvet Strip and Weather Strip. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RearGuides andCables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . . . . . . . .
Drive Pinion. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Water DrainHoses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . . . . . . . . . . . . . . . . . .
Luggage Rack. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SPECIFICATIONS: (Not Applicable) Page No.
2F-24
2F-26
iF-27
2F-29
2F-29
2F-30
2F-31
2F-3i
DIAGNOSIS
SUN ROOF DIAGNOSIS
_ -
CONhTlONPAUSEI~C~RRECTI~X~
Sun roof does not operate
Transporter cable lengths
parallel. equal.Close sun roof, slide sun roof
frame to rear, remove.crank
handle
and cable crank. Check
that sun roof bears against sun
roof opening velvet strip and
that lifter’ portion of rear lifter
guides is positioned approximately
90 degrees to guide rails.
Turn
cable crank fully clockwise and
reinstall into cable box.
Transporter cables damaged
or worn. Replace cables. Both cables
must be replaced if either one
is damaged or worn.

2F-261973 OPEL SERVICE MANUALMAINTENANCE AND ADJUSTMENTSADJUSTING HEIGHT OF SUN ROOF PANEL
Adjust height of sun roof as follows:
1. Opel sun roof to half open position and pry apart
sun roof frame from sun roof panel (see Figure
2F-1).Figure
ZF-1 Separating Sun Roof Frame From SunRoof Panel2. Push detached sun roof frame rearward until it
contacts car roof stop.
NOTE: If difficulty is encountered when pushing
sun roof frame to rear due to the frame hooking into
the sun roof panel, close sun roof until lifters come
into operation. The sun roof frame should now easily
slide rearward.
ADJUSTMENT FRONT OF SUN ROOF
To adjust height of front of sun roof proceed as
follows:
1. Close sun roof.
2. Loosen screws securing front guides to front of sun
roof panel (see Figure
2F-2). Rotate height adjust-
ment ring until desired height is attained.
3. Readjust guides outward so that guides just touch
sides of rails and are not wedged or cocked against
rail sides and tighten screws. Recheck height adjust-
ment.
NOTE: The guides should lightly contact the guideFigure
ZF-2 Sun Roof Front Guide
rail and should have a clearance of no more than 0.02
inch.
ADJUSTMENT. REAR OF SUN ROOF
To adjust height of rear of sun roof proceed as fol-
lows:1. Completely close sun roof and check that the rear
sun roof lifter guides from approximately a 90 degree
angle with respect to the guide rail and that the lifter
contacts the guide stop (see Figure
2F-3). If this is
Figure
2F-3 Rear Sun Roof Lifter 90 Degrees toGuide Rail

SEATS, INTERIOR TRIM AND HEADLINING26-33SEATS, INTERIOR TRIM AND HEADLINING
CONTENTS
SubjectPage No.
DESCRIPTION AND OPERATION: (Not Applicable)
DIAGNOSIS: (Not Applicable)
MAINTENANCE AND ADJUSTMENTS: (Not
Applicable)
MAJOR REPAIR:
Removal and Installation
FrontSeat
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .RearSeat
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Glove Compartment Lock ..,.........................................
Front
SidePanelTrimPad. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Headlining
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RearSidePanelTrimPad. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .SPECIFICATIONS: (Not Applicable)26-33
26-33
26-3426-34
26-3526-37
MAJOR REPAIRREMOVAL AND INSTALLATION OF FRONT SEAT
1. Pull hook out of seat lock. See Figure 2G-2.
2.TZ.Gy3at towards the front and unscrew. See Fig
Figure
2G-2 Pulling Hook Out of Seat LockFigure
2G-3 Seat To Underbody Attachment
REMOVAL AND INSTALLATION OF REAR SEAT
BACK1. Push seat towards seat back and unhook it to-
wards the top. See Figure
2G-4.
2. Unscrew safety belt on left and right side and bendup metal tabs below seat back. See Figure
2~3-5.

2H-381973 OPEL SERVICE MANUAL
BUMPERS
CONTENTS
Subject
DESCRIPTION AND OPERATION: Protective Moldings
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . . *. . . . . . . . . . . . . . . . .
DIAGNOSIS: (Not Applicable)
MAINTENANCE AND ADJUSTMENTS: (Not
Applicable) MAJOR REPAIR: Removal and Installation
1900
- Manta. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GT. . . . . . . . . . . . . . . . . . . . . . . . . . . * . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . . . . . . . . . . . . . . . . . . .
Trailer Hitch Installation, . , . . . . . . . . . . . , . . . . . . . . . . . . . . . . . . . . . \
. . . . . . . . . . . . . .
SPECIFICATIONS: (Not Applicable) Page No.
2H-38
2H-38
2H-39
2H-41
DESCRIPTION ‘AND OPERATION
PROTECTIVE MOLDINGS
All 1973 Opel bumpers are equipped with rubber
protective moldings as standard equipment. The
moldings are easily removed by removing the attach-
ing nuts located on the inboard side of the bumper.
MAJOR REPAIR
REMOVAL AND INSTALLATION OF FRONT
BUMPER AND BUMPER GUARDS
(OPEL 1900 -
MANTA)
Removal
1. Remove bumper attaching screws on inside
- left
and right
- and from left and right brackets. See
Figure
2H-2.
2. From the front, unscrew bumper guard attaching
screws. See Figure‘
2H-2.
Remove bumper and bumper guards.
Installation
1. Attach bumper guards to bumper.
Figure ZH-2 Bumper Attaching Screws
2. From the front, secure bumper guards with attach-
ing screws. See Figure
2H-2.
3. Install attaching bolts on left and right brackets,
and on left and right inside. See Figure
2H-2.
REMOVAL AND INSTALLATION OF FRONT
BUMPER BRACKETS (OPEL 1900
- MANTA)
The front bumper brackets are attached with three
screws. Removal of the three screws will allow re- moval and installation of the front bumper brackets.
See Figure
2H-3.
REMOVAL AND INSTALLATION OF REAR
BUMPER AND GUARDS (OPEL 1900
- MANTA)
1. Remove license plate lamp.
2. Remove bumper attaching screws and bumper
brackets. See Figure
2H-4.

3A- 21973 OPEL SERVICE MANUAL
FRONT SUSPENSION
CONTENTS
Subject
DESCRIPTION AND OPERATION:SuspensionDescription. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .DIAGNOSIS: (Not Applicable)
MAINTENANCE AND ADJUSTMENTS:
FrontWheel
BearingAdjustments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .MAJOR REPAIR:
Removal and Installation of Front Suspension . . . . . . . .Upper Ball Joint Removal and Installation
. . . . . . . . . . . . . .Lower Ball Joint Removal and
Installation
. . . . . . . . . . . . . .Upper Control Arm
Removal andInstallation
. . . . . . . . . .Lower Control Arm Removal and Installation
. . . . . . . .Steering
Knuckle
RemovalandInstallation. . . . . . . . . . . . . .Shock Absorber
RemovalandInstallation. . . . . . . . . . . . . . . .Front Spring Removal and Installation
. . . . . . . . . . . . . . . . . . . . . .SPECIFICATIONS:Page No.
3A- 2
3A- 4
3A- 4
3A- 7
3A- 73A-103A-113A-133A-153A-15
Bolt Torque and Front End Alignment Specifications
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3A-18
DESCRIPTION AND OPERATION
SUSPENSION DESCRIPTION
GTThe GT uses a maintenance-free independent front
wheel suspension and features unequal length con-
trol arms and a transverse three-leaf spring. The en-
tire front suspension is attached to the front cross
member and can be removed as a unit if so desired.
The engines installed in the GT are not supported by
mounting brackets but rest on a separate cross mem-
ber. The front suspension cross member is reinforced
in the area of the attachment to the frame. A one-
part damper plate is installed between cross member
and frame.
Ball joints are employed in the conventional manner
to provide pivoting joints between the control arms
and steering knuckles. Upward movement of the
control arms is limited by two large rubber bumpers
attached to the cross member.Road shock is dampened by the double direct acting
shock absorbers and a transverse double or triple
steel band spring. In addition, the shock absorber
limits downward travel of the control arms.
All moving parts, including ball joints, have no need
for lubrication as they have been pre-lubricated for
the life of the vehicle.
For distinguishing the individual front suspension
cross members,.a red label with black letters is stuck
onto the front side of the shock absorber support. See
Figure 3A-3.
Opel 1900. Manta
The front wheel suspension has coil springs and con-
trol arms of different length.
The stabilizer is designed to act as a tie strut. The end
is supported in a rubber bushing which is located in
a piece of tubing welded into the longer control arm.
To minimize brake torque, the horizontal shafts of