Pontiac And Grand Prix Automatic Level Control System - Pontiac Grand Prix Service Manual

REAR SUSPENSION 4-7
LOWER CONTROL ARM
-
EXCEPT FIREBIRD
REMOVE
CAUTION: If both control arms are to be replaced,
remove and replace one control arm at a time to prevent
the axle from rolling or slipping sideways as might occur
with both lower control arms removed, making
replacement difficult.
1. Raise rear of car.
2. Support nose of axle housing with a jack stand.
3. Remove pivot bolt at axle housing bracket.
4. Remove pivot bolt at frame side rail and remove
control arm.
NOTE: Clean and inspect rubber bushing and
if
worn,
replace as outlined in this section.
INSTALL
1. Install by reversing above steps.
2. While holding nut, tighten pivot bolt to 110 lb. ft.
torque or while holding pivot bolt, tighten nut to 80 Ib.
ft. torque.
NOTE: Car must be at curb height when tightening
pivot bolts.
LOWER CONTROL ARM BUSHING
REMOVE
1.
Remove lower control arm (see LOWER CON-
TROL ARM -REMOVE
-
EXCEPT FIREBIRD).
2. Remove bushing, using components of tool J 21474
as shown in Fig. 4-7.
Fig. 4-8 Installing Upper or Lower Control Arm
Bushing Except Firebird
INSTALL
1. Install bushing using components of tool J 21474 as
shown in Fig. 4-8.
2. Install lower control arm (see LOWER CONTROL
ARM -INSTALL
-
EXCEPT FIREBIRD).
PONTIAC AND GRAND PRlX AUTOMATIC
LEVEL CONTROL SYSTEM
PRECA UTIONS
The precautions outlined below should be heeded to
insure satisfactory function of the system:
MINIMUM PRESSURE
-
For best ride characteristics
with an emply car, a minimum pressure of
10
psi should
be maintained.
MAXIMUM PRESSURE
-
The pressure may be varied
to a maximum of 90psi to level the car with loads.
LINES A N D FITTINGS
-
The air lines cannot
withstand exhaust system temperatures. At least 1
I/ 2 "
clearance should be maintained between the air lines and
any portion of the exhaust ystem.
Flexible air lines are used throughout the system and are
118"
diameter tubing. Each jitting consists of a rubber
seal, metal sleeve and nut (Fig. 4-11). These parts are
intended specijically for the 118" diameter line and must
be used to aflect a reliable seal.
While the lines are flexible for easy routing and handling,
care should be taken not to kink them and to keep them
from coming in contact with the exhaust system (Fig. 4-12
and
4-13).
TUBING
REMOVE
Tubing may be removed by simply unscrewing the
nut.
NOTE: Be sure system is dejlated through service valve
before separating air lines. When installing tubing at
any fitting, be careful not to kink line (Figs. 4-12 and
4-13).
INSTALL
1. Preassemble metal sleeve and rubber seal.
2; Place nut on tubing.
3. Insert tube into metal sleeve and rubber seal until
tube bottoms.
4. Holding tube in bottomed position, tighten the tube
nut to 70 Ib. in. torque.