1973 OPEL GT-R Service Manual

GENERAL INt=ORMATION OA-1
GENERAL INFORMATIONKEYS AND LOCKSEvery key has a number engraved on one side which
identities the key blank manufacturer. On the oppo-
site side of GT keys, is a removable adhesive foil on
which, the profile and cutting code letters and num-
bers are imprinted. Attached to the protective key
cover of Opel
1900 and Manta keys, is a tab on which
the profile and cutting code letters and numbers are
imprinted. Record the key cutting code letters and
numbers before the adhesive foil or plastic tabs are
discarded as this information is necessary to obtain
replacement keys.
In the event of lost keys and code records, one or
more locks may be removed to obtain the code num-
bers. The codes are stamped on the trunk and igni-
tion lock cylinders and on the door lock plunger
shaft. If a lock cylinder is damaged, it must be re-
placed. This then means that the owner will have an
additional key.REMOVE ANDDOOR &
IGNIKEY CODELOCK. OPELIGNITION
LOCKGAS CAP LOCKGTGT
Figure OA-1 1973 Keys
FEDERAL CERTIFICATION LABELIn accordance with Federal Motor Vehicle Regula-
tions, a certification label is
affIxed to all 1973 mod-
els.The label has a certification statement, vehicle iden-
tification number, and month and year that the vehi-
cle was built. The label is attached vertically to the
left front door inner panel lock facing. See Figure
OA-2.
VEHICLE IDENTIFICATION
Model Identification PlateThe model identification plate as illustrated in Fig-
ure OA-3 is attached to the inside right front inner
fender panel on Opel
1900 and Manta and on top of
the right side of the cowl on the GT. The information
embossed on this plate includes such things as; type
and model of vehicle, allowable front axle load, al-
lowable maximum vehicle weight, allowable rear
axle load, paint color code and chassis serial number.
The key to identification is that the first two digitsFigure OA-2 Federal Certification Label Location
of the serial number represents the vehicle model.
The remaining digits are the actual serial number.
Figure OA-3 Model Identification Plate
Engine Number
The engine number is stamped in a machined boss on
the upper left center of the engine block. The number
starts with 1.9US which denotes the displacement in
Liters and also that the engine is equipped with the
Opel Emission Control System.
Vehicle Identification NumberA new thirteen digit vehicle identification number is
used on all Opel models imported for 1973. It is
embossed on a narrow strip of metal which is at-
tached to the left windshield post on Opel 1900 and
Manta models and to the top of the left end of the
instrument panel cover. In all cases the number isvisable when looking through the windshield from
outside the vehicle.
This new identification number includes; model
designation, engine code, model year, assembly plant
and the sequential number. See Figure OA-4.

sOA- 1973 OPEL SERVICE MANUAL _
MODEL DESIGNATIONSOLll - OPEL 1900 2DR SEDANOL60
-OPEL 1900 4DR SEDAN
OL15 OPEL 1900 3DR WAGON
MANTA 2 DR SPT. CPE.
OL77 -
cMANTA 2DR RALLYE SPT. CPE.
MANTA LUXUS 2DR SPT. CPE.1 OY07 GT 2DR SPT. CPE.
+
1VEHICLE IDENTIFICATION NUMbER
OL77N
GM Model Designation
I
Engine Code
Model Year
Assembly Plant
c9123456
ilGENERAL SPECIFICATIONS
MODEL AI(ID
NAME I
Opel
1900
Manta
51.2DrSedan
53.4DrS+n
54.3DrWqgon
57. 2Dr Spi. Cpe.57R- 2Dr R&ye Spt. Cpe.
Manta
LUXUS57L. 2Dr Lu+sSpt. Cpe
GT
77. 2Dr Splf. Cpe.
IVVHEEL- FRONT REAR CURBOVERAL
BASETREAD TREAD WEIGHT WIDTH LENGT,
2138=
2183*164.6
2227l
2183l
95.752.452-64.3
2205l
171
2183l
49.450.62120*62.2161.9l Add 44
Ibs. for auto. trans.
Figure OA-4 General InformationHElGHl
52.6
53.3
51.3
47.4PAINTVehicle Identification Plate when that type of paint
Two types of paint are again useh for 1973, Enamelis used. Paint supplied by U.S. suppliers for repair
work is applicable on either type paint except that a
and Acrylic. The word “Acrylic’! is embossed on thedifferent match formula is required.
/

GENERAL INFORMATION OA-3
EXTERIOR PAINTMODELScodacodaName Name51 5153 5354 5457 5757L 57L57R 77 57R 77
C CAlpine White Alpine White0 0
strata Blue Strato Blue
F FGlacier Blue Glacier Blue
H HJade Mist Jade Mist
Q Q
Rallye GoldRallye Gold
RRFlame Red Flame RedT T
Antique Bronze Antique Bronze
X XFire Glow Fire GlowY Y
Chrome Yellow Chrome Yellow
M MDeep Burgundy Deep Burgundy
B BRegency Blue Regency Blue
S SGrecian Silver Grecian SilverX X
X XX XX XX XX X
X XX XX XX X
X XX XX X
X XX XX XX X
X XX XX XX XX XX X
x. xx. xX XX XX XX X
X XX XX XX XX XX X
X XX XX XX XX X
X XX XX XX XX XX X
X XX XX XX XX XX X. .
X X
X X
X X
I IVINYL TOP COLORI511 53 1 54 1 571 57L 1 57R 1 77 1
Black
Burgundy
Dark Blue
‘Vinyl tdp color coordinated with exterior color.30A5
Figure OA-5 Paint and Vinyl Top Color Chart

08-4 VEHICLE LIFTING ~
~ VEHICLE LIFTING
ALL; MODELS
ALL OPEL
DO NOT LIFT OR SUPPORT
GT (ONLY) AT TRACK-BAR
ATTACHMENT TO AXLE.
i
FIT nII IINOTE: SUPPORTS MUST BE POSITIONEDSd AS TO DISTRIBUTE LOAD AND SUPPORTVtiHICLE IN A STABLE MANNER.
3081Figure
OB iIf it is necessary to use any liftink device other thinthe briginal equipment jack, such as a hydraulic,
scissors or floor jack, or a
servicJz station or dealer
hoist, see Figure OB-1 for acceptable lifting points.
Lifting should only be done at the positions indicatkdto prevent possible damage to the vehicle.
CAUTION: Failure to follow the procedure
outljnedabove may result in unsatisfactory
vehicle perfomance,
or a durability failure
which may result in
loss of control of the
vehicle.

LUBRICATION AND MAINTENANCE OC-5LUBRICATION AND MAINTENANCE
LOEngine Oil ,current “ISCOI-ifVl SE’
-u9 Lubriplate’,9F Hvdraulic Brake Fluid -Delco supreme NO. 11’
CAPAClTlESOPEL 1900Coding SystemMANTA GT
,OW,6 6
UU
3oclFigure OC-1 1973 Lubrication Chart

CC-61973 OPEL SERVICE ‘MANUAL
LUBRICATION AND GENERAL MAINTENANCE
Every 4 months or 3,OW mile3~1*Engine OilEMISSION CONTROL MAINTENANCE
Every 24 months or31 1Engine Conpression
24,ooO~ 32heI cap, Tank and LinesEVsN
24.m milesI 33I Air Cleaner E,eme”tI
‘Alsa an Emision Control Servicel Also a Ssfarv Servicemc21Figure OC-2 1973 Maintenance Schedule

LUBRICATION AND MAINTENANCE OC-7SERVICESLUBE AND GENERAL MAINTENANCE
Vehicle operation under conditions such as heavy
dust, continuous short trips, use of other than un-
leaded or low lead fuels or pulling trailers, is not
considered normal use and therefore more frequent
maintenance will be required. Such additional
maintenance requirements are included where appli-
cable.
Engine OilChange each 4 months or
3,COO miles, whichever
occurs first, or each 2 months or
3,ooO miles when
the vehicle is operated under the following condi-
tions: (a) driving in dusty conditions, (b) trailer pull-
ing, (c) extensive idling or (d) short-trip operation at
freezing temperatures (with engine not thoroughly
warmed-up).Engine oils have a definite effect on ease of starting,
oil economy, combustion chamber deposits and en-
gine wear. It is recommended that a” oil which,
according to the label on the can is; (1) intended for
service SE and (2) passes car makers’ tests be used.
Oils confotming to these types contain detergent ad-
ditives. -
Select the proper oil viscosity from Figure OC-3.
Engine Oil FilterReplace at the first oil change and every other oil
change thereafter using Part No. 7965051 or equiva-
lent.
ChassisLubricate transmission shift linkage, hood latch and
parking brake cable guides and linkage.
Fluid LevelsCheck level of fluid in brake master cylinder, battery,
engine, axle, transmission and windshield washer.
Engine coolant also should be checked for proper
level and for corrosion and freeze protection to at
least -20°F or to the lowest temperature expected
during the period of vehicle operation. Proper engine
coolant also provides corrosion protection.
Any significant fluid loss in any of these systems or
units could mea” that a malfunction is developing
and corrective action should be taken immediately.
A low fluid level in the brake master cylinder front
reservoir could also be a” indtcator that the disc
brake pads need replacing.
The engine oil should be maintained at proper level.
The best time to check it is before operating the
engine or as the last step in a fuel stop. THIS WILL
ALLOW THE NORMAL OIL ACCUMULA-
TION IN THE ENGINE TO DRAIN BACK IN
the crankcase. To check the level, remove the oil
gauge rod (dipstick), wipe it clean, and reinsert it for
a” accurate reading. The oil level should be main-
tained in the safety margin, neither going above the
“FULL” mark “or below the “ADD OIL” mark.
See Figure OC-4.
DIP STICK MUST BE
INSERTED TO STOP
---L- -FULL+, 1 OT. ,-ADD
OIL
Figure OC-4 Engine Oil Dipstick
All models are equipped with tandem brake cylin-
ders. Maintain fluid level between MIN and MAX
marks on reservoir. See Figure OC-5. When adding
fluid use Delco Supreme No. 11 or equivalent.
TiresTo equalize wear, rotate tires as illustrated in Figure
OC-6.Adjust clutch when necessary as indicated by the
clutch warning lamp on Opel 1900 and Manta or