Porsche Boxster Owner's Manual page 264

7. Screw in wheel bolts; remove assembly aids
and screw in the remaining wheel bolts. Initially
tighten bolts in diagonally opposite sequence
so that the wheel is centered.
Please observe the chapter "WHEEL BOLTS"
on page 260.
8. Lower the car completely.
9. Tighten wheel bolts in diagonally opposite
sequence.
Immediately after changing a wheel, use
a torque wrench to check the prescribed
tightening torque (130 Nm/96 ftlb.).
Checking tire pressure with a pressure
gauge
Please observe the chapter "TPC TIRE
PRESSURE MONITORING" on page 119.
1. Remove the valve stem cap from the tire.
2. Press the pressure gauge onto the valve stem.
Note on operation
Do not press too hard or force the valve stem
sideways, or air will escape. If the sound of air
escaping from the tire is heard, reposition the
pressure gauge.
3. Read the tire pressure on the gauge stem and
compare it to the permissible tire pressure.
This information can be found on the tire
pressure plate in the left door aperture or in
the chapter Technical Data.
262
Practical Tips, Emergency Service
Please observe the chapter "TIRE PRESSURE
FOR COLD TIRES" on page 304.
4. Remove the pressure gauge.