hood release OPEL GT-R 1973 Service Manual

5C- 281973 OPEL SERVICE MANUAL
Figure 5C-51 Rear Wheel Brake Adjustment
disconnected, or when cables have been stretched
through extended use. Need for parking brake ad-
justment is indicated if the service brake operates
with good reserve, but the parking brake handle
can be engaged, more than eight ratchet clicks
under heavy pressure.
After making certain that service brakes are in good
adjustment, adjust parking brake mechanism as fol-lows:1. Fully release parking brake lever; check parking
brake cable for free movement.
2. Loosen equalizer nut or adjusting nut, depending
upon whether. tension is to be increased or decreased
on cable.
3. Pull parking brake lever up by three (3) clicks. In
this position, adjust equalizer with adjusting and
lock nuts so that rear brakes just begin to bind. Take
care that rear brake action is equal on both rear
wheels. In case of unequal brake action, apply lubri-
cant to equalizer and brake cable.
4. After adjustment, tighten lock nut. Be certain that
equalizer is in horizontal position. Check operation
of parking brake. If parking brake adjustment doesnot result in proper brake action, inspect linings on
both rear wheels for possible replacement.
Filling Brake Master Cylinder
ReservoirThe master cylinder reservoir must be kept properly
filled to insure adequate reserve and to prevent air
from entering the hydraulic system. However, be-
cause of expansion due to heat absorbed from brakff
and from engine, master cylinder must not be over-
tilled.
The plastic brake fluid reservoir is attached to the
master cylinder which is located under the hood on
the left side of the cowl.
Thoroughly clean reservoir cover before removal to
avoid getting dirt into reservoir. Remove cover and
add fluid as required to bring level up to “MAX.”
marked on reservoir.
Use Delco Supreme No. 11 Hydraulic Brake Fluid
or equivalent.
Do not use shock absorber fluid or any other fluid
which contains mineral oil. Do not use a container
which has been used for mineral oil. Even a trace of
mineral oil will cause swelling and distortion of rub-
ber parts in the hyrdaulic brake system.
Bleeding Brake Hydraulic SystemA bleeding operation is necessary to remove air whe-
never it is introduced into the hydraulic brake sys-
tem. Since air is compressible and hydraulic fluid is
not, the presence of air in the system is indicated by
a springy, spongy feeling of the brake pedal accom-
panied by poor braking action.
Air will be introduced into the hydraulic system if
the brake pedal is operated when the fluid is too low
in master cylinder reservoir. Air will also enter the
system whenever any part of hydraulic system is
disconnected.
It will be necessary to bleed both hydraulic systems
if air has been introduced through low fluid level or
by disconnecting brake pipes at master cylinder. If
brake pipe is disconnected at any wheel cylinder,
then that wheel cylinder only need be bled. If pipes
are disconnected at any fitting located between mas-
ter cylinder and wheel cylinders, then the wheel
cylinder(s) served by the disconnected pipe must be
bled.
Sequence for Bleeding Wheel
Cylinders or CalipersIt is advisable to bleed one wheel cylinder or caliper

HEATER SYSTEM - GT9A- 5
MAJOR REPAIR
REMOVAL AND INSTALLATION INSTRUMENT
PANEL FRESH AIR OUTLET
Removal
1. Remove instrument panel cover assembly. Refer
to Group 1.
2. Snap grille out of outlet.
3. Remove knob from lever and remove outlet.
Installation
1. Install outlet and knob onto lever.
2. Snap grille into outlet.
3.
Install instrument panel cover assembly. Refer to
Group 1.
REMOVAL AND INSTALLATION KICK PANEL
FRESH AIR OUTLET
Removal
Using a screwdriver, carefully pry out outlet.
Installation
Install outlet.
REMOVAL AND INSTALLATION BLOWER
SWITCH
Removal
i. Remove instrument panel assembly. Refer to
Group 1.
2. Unscrew switch assembly from panel.
Installation
1. Screw switch assembly to instrument panel.
2. Install instrument panel assembly. Refer to Group
1.
REMOVAL AND INSTALLATION HEATER
Ramova!
1. Remove lower radiator hose, drain, and collect
coolant. 2. Detach coolant feed (A) and return (B) hoses, in
engine compartment from heater core. See Figure
9A-5.
Figure 9A-5 Heater Hose Connections
3. In engine compartment remove hood lock control
cable retaining clip and cable from lock bar. See Figure
9A-6.
Figure 9A-6 Hood Release Control Cable
4. Remove console shift cover between seats using
the following instructions:
a. Remove ash tray and remove two screws under it.