tow OPEL GT-R 1973 User Guide

ROOF AND SUN ROOF2F-27
not the case, take off crank handle and cable crank
(see Figure 2F-4) and physically reposition lifters to
be approximately 90 degrees to guide rails and to
contact guide stops. Rotate cable crank to its fully
clockwise limit alad reinstall.
Figure 2F-4 Sun Roof Cranking Handle and CableCrank2. Open sun roof until rear lifters lay in a horizontal
position (see Figure
2F-5), loosen lifter pin nut and
turn lifter pin adjusting screw accordingly to lower
or raise lifter pin in slot of lifter.3. Hold lifter pin adjusting screw down and tighten
lifter pin nut.
4. Recheck operation of sun roof and note that lifter
contacts stop when lifter is approximately 90 degrees
to guide rail.
Pull sun roof frame forward and reattach to sun roof
panel.
MAJOR REPAIRREMOVAL AND INSTALLATION OF SUN ROOF
PANEL AND SUN ROOF FRAME
Removal of Sun Roof Panel1. Open sun roof to half open position and pry loose
sun roof frame from sun roof panel (see Figure
2F-1).2. Push detached sun roof frame toward the rear
until it contacts car roof stop.
NOTE: If difficulty is encountered when pushing
sun roof frame rearward due to the frame hooking
into sun roof panel, close sun roof panel completely
and then proceed to push sun roof frame toward rear
of car.
3. Close sun roof panel and then open it approxi-
mately one turn of operating crank.
4. Remove one of two screws holding each of front
Figure
2F-5 Lifter Pin Adjusting Screw
Figure ZF-6 Swinging Front Guide Inboard

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.

26-341973 OPEL SERVICE MANUAL
a 13/16 inch deep socket, and remove. See Figure2G-6.Figure
ZG-4 Seat to Underbody Hook
Figure
ZG-5 Seat Back Metal Tabs
3. Remove seat back towards the top.
REMOVAL AND INSTALLATION
OF GLOVE
COMPARTMENT DOOR LOCK
1. Unscrew nut of glove compartment lid lock, usingFigure ZG-6 Removing Glove Compartment Lock
2. Install new glove compartment lid lock.
REMOVAL AND INSTALLATION OF FRONT SIDE
PANEL TRIM PAD
1, Lift up door sill shield and pull off sealing strip up
to the instrument panel cover. See Figure 2G- 7.
Figure
ZG-7 Pulling Off Sealing Strip

2G-361973 OPEL SERVICE MANUAL
3. Install and align the remaining five listing wires.
If required, caulk retainers of 2nd and 5th listing
wires so that wires run in a straight line transversally
under the roof. See Figure
2G-9.Figure ZG-10 3rd. 4th and 6th Listing Wire
Attachment4. Lightly pull headlining towards the rear and ce-
ment to the rear roof frame cross member and then
to the rear quarter pillars using rubber cement.
When pulling headlining toward rear be sure that the
listing wires are not pulled out of line. A folded clothshould be used to smooth down cemented portions
of headlining.
5. Cut off surplus headlining along rear window, rear
quarter windows, and windshield, leaving enough to
tit under rubber channels.
6. Cement surplus material to pinchweld flanges.
7. Cut off excess headliner around door openings and
cement trimmed edge to pinchweld flange using rub-
ber cement.
Figure 2G-12 Quarter Window and Lock Pillar Sealing
StripFigure
2G-1 1 Lock Pillar Shield Attaching ScrewsFigure 2G-13 Trim Pad and Retaining Button

SEATS, INTERIOR TRIM AND HEADLINING20.378. If wagon, install front window and quarter win-
dows. It other than wagon, install front and rear
windows.9. Install coat hooks, assist straps, interior lamp, sun
visors, and rear view mirror.
10. Install parcel shelf and plastic retainers (sedans
only).
11. Install rear seat back into position and bend over
tabs holding lower portion of seat back (sedans only).
12. In trunk area instail cardboard against rear seat,
cross brace, and bend over tabs (sedans only).
13. Install rear seat cushion (sedans only).
14. Connect battery.REMOVAL AND INSTALLATION OF REAR SIDE
PANEL TRIM PAD
1, Unscrew shield on lock pillar. See Figure 2G- 11.
2. Pull off sealing strip on lock pillar and rear quarter
window. See Figure 2G- 12.
3. Remove ash tray.
4. Remove rear seat and push retaining button out of
trim pad. See Figure
2G-13.5. Pull out trim pad towards the front.
6. Prior to installation, press together sealing strip
ends to obtain a tight seat.

FRONT SUSPENSION3A- 7
Figure 3A-12 Front Suspension Attaching Points
Always use new self-locking nuts.
7. Reinstall guard plate.
8. Crosswise torque wheel nuts to 65 ft.lbs.UPPER BALL JOINT REMOVAL AND
INSTALLATION
RemovalI. Place jack under spring eye and raise car. Remove
wheel from car.
2. Remove cotter pin and castle nut from upper ball
joint stud. Discard cotter pin.
3. Press ball stud from steering knuckle using puller
J-21687, and remove two (2) bolts attaching ball
joint to upper control arm. See Figure 3A-13.
4. If dust cap on upper ball joint is torn or missing,
the ball joint should be replaced.
Installation
CAUTION:
Fasteners are important attachingparts in
that they could
afEct the pertkmance of vital com-
ponents and systems, and/or could result in major
repair expense. They must be replaced with one of
the same part number or with an
equivaknt pa-t if
replacement becomes necessary. Do not use a re-
placement part of lesser quality or substitute design.
Torque values must be used as specified
durikg reas-
sembly to assure proper retention of these parts.Figure 3A-13 Upper Ball Joint
1. Install upper control arm ball joint with the off
center holes in flange showing towards the steering
knuckle spindle.
2. Install two (2) bolts attaching ball joint to upper
control arm. Torque nuts to 29 Ibft.
3. Install upper ball joint stud in%eering knuckle
and torque castle nut to 29
Ib.ft. on GT and 40 lb&.
on Opel
1900 - Manta.
4. Install new cotter pin, and replace wheel.
5. Always check caster and camber after installing
new ball joints.
LOWER BALL JOINT REMOVAL AND
INSTALLATIONNew lower ball joints have an axial play of up to
,020inch. The maximum permissible axial play of older
ball joints is
,080 inch. At an axial play of more than
,080 inch, the lower ball joint must be replaced. If the
dust cap is torn, loose, or missing, the lower ball joint
must also be replaced. See Figure
3A-14.The lower ball joints are checked for wear by using
Checking Gauge J-23402 for the GT, and using
Checking Gauge J-23745 for the Opel 1900
- Manta.
See Figure
3A-15.
Removal GT1. Raise car and support at rear of front frame rails.
2. Remove front wheel.

FRONT SUSPENSION3A- 9
8. Press ball stud out of lower control arm.Removal Opel 1900 - MantaBefore raising vehicle, install Hooks J-23697 on re-
spective vehicle side to cross member and upper con-
trol arm. See Figure 3A-7.
1. Raise car and support at rear of front frame rails.
2. Remove front wheel.
3. At the lower control arm ball joint, remove castle
nut cotter pin and slacken back nut so that the thread
can no longer be damaged.
4. With a suitable drift, detach ball joint from steer-
ing knuckle. With jack, lift up lower control arm,
unscrew castle nut and remove Hooks J-23697.
5. Unscrew upper control arm ball joint and suspend
front wheel hub and brake caliper in wheel house. Do
not turn upper control arm ball joint flange, as this
would result in a change of camber.
6. Remove defective lower control arm ball joint
using Tools J-9519 and Receiver J-23754.
Installation GT
CAUTION:
Fasteners are important attachingparts in
that they could affect the performance of
vitaI com-
ponents and systems, and/or could result in
ma&r
repair expense. They must be replaced with one of
the same part
numer or with an equivalent part if
replacement becomes necessary. Do not use a
re-
placement part of lesser quality or substitute design.
Torque values must be used as specified during reas-
sembly to assure proper retention of these parts.1. When pressing the ball joint in place, make certain
the locating notch in the lower rim of the ball joint
matches the alignment reference mark placed on the
lower control arm prior to removal. The notch in the
ball joint bottom plate, identifying the direction of
the elongated slot, must point towards the brake
drum backing plate. See Figure
3A-17. Alignment
must be within 2 degrees of lower control arm center-
line. If proper positioning of the ball joint is not
accomplished, the result is a limitation of the neces-
sary ball stud movement. If ball stud movement is
limited, an interference between the ball stud and
housing is created, and binding or even fracture may
occur. Replacement ball joints may or may not have
marking notch as shown in Figure
3A-20. If it does
not have a marking notch, the joint is completelysymetrical and may be installed in any position.
When pressing in ball joint do not press on bottom
plate, but on ball joint housing only.2. Install dust cap on lower ball joint and fill with
chassis lubricant. Attach dust cap retainer.
3. Press ball joint into steering knuckle. Use
J-9519-3 as installer and J-21690 as a supporting
sleeve.4. Install castle nut on ball joint stud and torque to
40
Ib.ft. Install new cotter pin.
5. Reconnect shock absorber to lower control arm
and torque to 30 lb.ft.
6. Remove spring compressor.
7. Install front wheel, and lower the car.
8. Always check caster and camber after ball joint
replacement.
Installation Opel 1900 - Manta
CAUTION:
Fasteners are important attachingparts in
that they could
aff’ect the performance of vital com-
ponents and systems, and/or could result in
ma&r
repair expense. They must be
rep/aced with one of
the same part number or with equivalent parts, if
rep/acement becomes necessary. Do not use a re-
p/acement part of lesser quality or substitute design.
Torque valves must be used as
specitied during reas-
sembIy to assure proper retention of these parts.1. Drive new ball joint into lower control arm using
Tools J-9519 as installer and J-23755 as a supporting
sleeve. Do not strike onto ball joint bottom.
The ball joint is maintenance-free. It is supplied as an
assembly only and cannot be disassembled further.
2. On new lower control arm ball joint, make sure
that the marking groove in the housing bottom in
alignment with the axis of the lower control arm.
Permissible deviation: minus 2 degrees to plus 2 de-
grees.This is required, to obtain the maximum freedom of
movement of the ball stud in the housing. See Figure
3A-18.3. Attach steering knuckle together with front wheel
hub and brake caliper to lower control arm ball joint.
Torque castle nut to 54
ft.lbs.4. Attach ball joint to upper control arm and torque
to 29
ft.lbs. Always use new self-locking nuts.
5. Install wheel and tighten nuts to a torque of 65
ft.lbs.6. Lower car and check caster and camber.

3C-24 1973 OPEL SERVICE MANUAL
NOTE:
FRONT OF CAR
4Figure
3C-3 Upper Control Arm Shaft and Bushingsx.3
Figure
3C-4 Supporting Vehicle at Both Lower
Control Arms(B) (rear) between upper control arm and shock ab-
sorber support. See Figure
3C-5.5. One
.24” thick washer each is installed in produc-
tion on each car side. Consequently, only two adjust-
ments are possible by adding washers of different
thickness.
6. One
.12” in front and one .36” in the rear (caster
increase of 1 degree) or one
.36” in front and one. 12”
in the rear (caster decrease of 1 degree). Never addFRONT OF CAR
3G5
Figure
3C-5 Caster Adjustment Washer Location -Opel 1900 - Manta
several washers in one place. The washers B installed
in production have a larger outer diameter than the
washer A. For service, the Parts and Accessories
Department supplies only larger washers with an
outer diameter of 1.57”.
7. Insert control arm shaft from front towards the
rear into upper control arm and shock absorber
SUP-port. Observe that the crown of both plate washers
shows inwards. See Figure
3C-5.8. Torque hex nut of control arm shaft to 40 ft.lbs.
Always use new self-locking nut.
9. Torque wheel nuts to 75
ft.lbs.10. Recheck caster setting.

FRONT END ALIGNMENT 3C-25
Figure 3C-6 Adjusting Toe-In (GT)ADJUSTING CAMBER
Camber is adjusted by turning the upper ball jointflange 180 degrees. This means that only two possi-
ble camber adjustments can be made. At the factory
camber is set at the smallest possible positive camber
setting for GT and smallest possible negative camber
for Opel
1900 - Manta. Rotating the flange will make
camber more positive on GT and more negative on
Opel
1900 - Manta.
1. Raise front end of car using wood block on jack
to prevent damage to front cross member.
2. Support car below lower control arm and remove
front wheel on side to be adjusted.
3. Remove ball joint from upper control arm and
front steering knuckle.
4. Lift upper control arm and turn the ball joint
flange through 180 degrees.
5. First tighten both ball joint attaching bolts on
upper control arm and then the ball stud castle nut.
Torque to 29 ft. lbs. on GT and 44
ft.lbs. on Opel
1900 - Manta. Install new cotter pin.
6. Install front wheel and torque wheel nuts to 72
lb.ft. on GT and 75 Ib.ft. on Opel 1900 - Manta.
7. Recheck camber.
ADJUSTING TOE-IN
(GT)Toe-in is adjusted by rotating the tie rod sleeves.
Refer to Figure
3C-6.1. Recheck caster and camber before proceeding
with toe-in adjustment. If correct, adjust toe-in.2. Set wormshaft and ball nut to steering gear high
point by turning steering wheel half way from one
stop to the other, noticing the following:
(a) With the steering wheel hub button removed, the
“marking” on the steering shaft end should be in a
horizontal position.
(b) The steering wheel spokes should also be in a
centered position.
3. Remove wire clamps on left and right tie rod and
push back bellows.
4. Loosen clamp bolts and tie rods. See Figure
3C-4.5. The toe-in should be
l/32” - l/8”.When adjusting toe-in, never grip tie rod on inner
ball stud joint. To avoid ball stud resting against
inside of hole in tie rod outer end, center outer end
of each tie rod to the ball stud.
6. Pull bellows over tie rods and attach with wire
clamps. The bellows must not be twisted and wire
ends must show towards steering gear adjusting
screw opening.
7. Torque clamp bolts to 12
Ib.ft.8. After toe-in adjustment, turn steering wheel sev-
eral times completely towards the left and right to
determine whether bellows are properly attached to
the tie rods and steering gear housing.
ADJUSTING TOE-IN (OPEL 1900. MANTA)
The adjustment of the toe-in has always to be carried
out on both tie rods.

3C-26 1973 OPEL SERVICE MANUAL
1. Loosen lock nut of left and right tie rod and
slacken back nut.
2. Remove hose clamp for rubber bellows attach-
ment from respective axial joint and adjust toe-in by
turning axial joint. When doing this, observe that the
rubber bellows, having a tight seat on thejoint, is not
twisted. If necessary, lubricate seat of bellows and
hold back bellows when turning. See Figure 3C-7.Figure
3C-7 Adjusting Toe-In Opel 1900 Manta
3. Toe-in should be l/S”
- 3/16”.
4. Torque lock nut of left and right tie rod to 47
ft.lbs.5. Attach respective rubber bellows with hose clamp,
making sure that clamp bolt points towards the
front. The rubber bellows must not be twisted, i.e.,
SpecificationsFRONT END ALIGNMENTthe individual grooves of bellows must be in vertical
position.
6. After adjustment, turn steering several times to the
left and right to determine if a proper attachment of
both rubber bellows to the steering gear housing is
warranted.
CHECKING THEORETICAL KING PIN
INCLINATION
When checking theoretical king pin inclination, car
must be on a level surface, both transversely and fore
and aft, must have trim heights within limits, and
must be at curb load.
With camber known to be within specitied limits,
theoretical king pin inclination should check to 8.5
degrees for Opel 1900
- Manta, and 6 degrees for GT.
If camber is incorrect beyond limits of adjustment
and theoretical king pin inclination is correct, or
nearly so, a bent steering knuckle is indicated.
There is no adjustment for theoretical king pin incli-
nation as this factor depends on the accuracy of the
fronts suspension parts. Distorted parts should be re-
placed with new parts.
The practice of heating and bending front suspension
parts to correct errors must be avoided as this may
produce soft spots in the metal in which fatigue and
breakage may develop in service.
MODELCASTER
’CAMBER ’TOE-INOUTER WHEEL
MIN.. MAX.WHEN INNER
WHEEL AT 20
’1900‘3
l/2-61/2-1?1/2I/% - 3/1619 l/4GT3+1
1+1/2l/32 - l/818 l/2* Permissable deviation from left to right wheel
- maximum 1”.