Chevrolet CORVETTE Owner's Manual page 189

188 Driving and Operating
Right Side Rear Shown, Left Side Rear Similar
3. Rear Knuckle Mounted Cooling Duct
4. Rear Lower Control Arm Cooling Duct
Shock Spring Seat Adjustment
The front shocks, on vehicles without
hydraulic front lift and rear shocks, have
threaded spring seats that allow adjustment
of the preload on the coil springs. The
vehicle corner weights can be adjusted for
track use. If the vehicle trim height is
modified, it should be returned to normal
trim height before street use.
The spring seat can be adjusted
approximately 20 mm (0.8 in) up or down
from the nominal position. Each complete
turn of the spring seat will change the
vehicle height approximately 1.5 mm
(0.06 in). When adjusting the seat to the
upper limit, lift the dust boot and ensure
the seat does not thread off the center
support tube (stop adjustment when threads
no longer visible). When adjusting the seat
to the lower limit, leave approximately
10 mm (0.4 in) of thread visible for the
lower lock nut to have full thread
engagement.
The following procedure can be complex and
should only be performed by trained
personnel. See your dealer.
To adjust the lower spring seat:
1. Raise the vehicle so the tires are
completely off the ground.
Front Shown, Rear Similar
2. Loosen the lower spring seat lock nut (2).
3. Thread the lower spring seat lock nut (2)
downward off of the threads to its
resting location on the shoulder of the
center support tube.
4. While holding the center support tube
holes, turn the spring seat (1) upward to
increase spring preload, or downward to
decrease spring preload.
5. Thread the lower lock nut (2) back on to
the center support tube and torque it
against the spring seat (1) to 25
(18.4 lb ft).