Opel ASTRA Owner's Manual page 244

242 Vehicle care
Set the jack to the necessary
height. Position it directly below
the jacking point in a manner that
prevents it from slipping.
Attach jack handle and with the
jack correctly aligned rotate
handle until wheel is clear of the
ground.
5. Unscrew the wheel nuts.
6. Change the wheel. Spare wheel
3 243.
7. Screw on the wheel nuts.
8. Lower the vehicle and remove
jack.
9. Install the wheel wrench ensuring
that it locates securely and tighten
each nut in a crosswise
sequence. Tightening torque is
140 Nm.
10. Align the valve hole in the wheel
cover with the tyre valve before
installing.
Install wheel nut caps.
Install centre cap on alloy wheels.
11. Install vehicle jacking point cover
on versions with sill panelling.
12. Stow the replaced wheel 3 243,
the vehicle tools 3 228 and the
adapter for the locking wheel nuts
3 61.
13. Check the tyre pressure of the
installed tyre and the wheel nut
torque as soon as possible.
Have the defective tyre renewed or
repaired as soon as possible.
Jacking position for lifting platform
Rear arm position of the lifting
platform centrically under the recess
of the sill.