Porsche 928S 1983 Driver Manual page 74

Black arrows: Jacking points for vehicle jack
White arrows: Lifting points for inspection platform or workshop jack
Order of working
1. Loosen front wheelscrews slightly.
2. Insert the car jack, with it tilted slightly
away from the bodywork, in the respec-
tive jacking point (black arrow).
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3. Jack the car up until the wheel to be
changed is clear of the ground.
4. Remove wheelscrews, remove wheel and
mount the spare wheel on the front axle.
In the case of a defective rear tire jack the
rear of the car up, after changing the front
wheel, and replace the defective rear
wheel with the front wheel.
5. When replacing the wheelscrews, do not
tighten too hard yet, and make sure that
the round surfaces of the screws sit pro-
perly in the depressions in the wheel,
which should be clean.
6. Screw the compressor hose first onto the
tyre valve, then plug the compressor into
the cigarette lighter socket. The neces-
sary tyre pressure is reached in a few
minutes.
7. Check tyre pressure with pressure gauge.
8. Let the car down from the jack, and
remove jack. Tighten the wheelscrews.
After changing a wheel, the wheelscrew
torque must be checked with a torque
wrench as soon as possible. (Tightening
torque 130 Nm, 13 kpm.)