Porsche 928 S 1984 Owner's Manual page 80

Black arrows: Jackports for car jack
White arrows: Lifting points for workshop hoist
or floor jack
Sequence of operation
1. Loosen the wheel nuts about one turn. Do
not yet remove the nuts.
2. Securely insert the car jack in the jackport
located under the body. There are two on
each side; front and rear.
Do not raise the vehicle until you are
sure the jack is securely engaged.
To raise the car, turn the handle clockwise.
Only raise the car as much as is needed to
change the wheel.
Fully unscrew all wheel nuts and remove the
wheel.
When the spare wheel is in position, re-
install the nuts and handtighten them cross-
wise. Vehicles equipped with a spare steel
wheel and light alloy road wheels which
have been theft-protected with lockable
wheel nuts must use a standard wheel nut
when mounting the spare. Vehicles deli-
vered with lockable wheel nuts by the ma-
nufacturer include, in addition to the four
keys, a standard wheel nut for the spare.
It is permissible to interchange a standard
wheel nut with a lockable wheel nut from
another wheel. Be sure the wheel nuts are
inserted with the beveled edge toward the
wheel. When tightened crosswise, the nuts
will center the wheel correctly.
6. Inflate the collapsible spare tire with the air
compressor. Check pressure with tire pres-
sure gauge.
7. To lower the car, turn the jack handle coun-
terclockwise till tire touches ground.
8. Fully lower the vehicle and remove jack.
9. Firmly tighten the wheel nuts again in a
crosswise pattern.
Correct tightness of the wheel nuts is important.
Correctly tightened nuts should have a torque
of 94 ft. lb. (130 Nm). This torque can be ob-
tained with the wheel nut wrench by any per-
son of average strength. If in doubt about the
correct tightness of wheel nuts, have it checked
with a torque wrench by your dealer or at a
service station.
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