Trouble Diagnosis Tests; Removing Rocker Arm Pin; Installing Valve Tension Spring In Boss; Installing Check Valve - Pontiac Grand Prix Service Manual

REAR SUSPENSION
4-15
Fig. 4-19 Installing Valve Tension Spring in Boss
TROUBLE DIAGNOSIS TESTS
Fig. 4-17 Removing Rocker Arm Pin
2. Install assembly in car and tighten upper bracket
OF LEVEL CONTROL
attaching screw to 9 lb. ft. torque.
-
SYSTEM
3. Connect high pressure line to regulator valve and
tighten fitting nut to 70 lb. in. torque. Install vacuum
1. Record rear trim height of empty car (measure from
line to compressor.
center of rear bumper to grand).
4. Inflate system through service valve to maximum
NOTE: Fill compressor through service valve with air at
available pressure (Fig. 4-24).
available line pressure.
2. Add weight equivalent to two passenger load (300
NOTE:
If
available pressure is less than 140 psi, start
to rear bumper or tailgate.
car
begin to
engine to build up reservoir to this pressure.
level in 4-18 seconds. Final position should be within
1" of original measurement.
3. Remove weight. Car should begin to settle in 4-18
seconds. Final position should be within 1" of original
measurement.
AUTOMATIC LEVEL CONTROL TEST GAGE
To properly service the Automatic Level Control, if
Fig. 4-18 Installing Check Valve
Fig. 4-20 Positioning Distributor Valve