General Procedure For Suspension Alignment

To exclude erroneous measurements, the following preconditions must be met before alignment and the following points should be given special attention:

Information 

• Carry out suspension alignment with an optical or electronic wheel alignment tester! 
• The measurement procedures should be taken from the operating instructions for the wheel alignment tester used! 

Curb weight of vehicle, i.e. vehicle in running condition, fully tanked with tyre repair kit or spare wheel and tools.

Joint and wheel-bearing play OK (wheel-bearing play cannot be adjusted).

Tyre pressure in accordance with specifications, fairly uniform tyre tread.

Quick-clamping holder for Cayenne (for the measured-value pickups) correctly fastened to the wheels.

Mounting surfaces for the quick-clamping holder on the wheels must be clean and flat. Always check the levelling surface on the wheels precisely in particular before fitting the quick-clamping holders.

Strictly comply with maintenance intervals for measuring equipment and measuring platform. If the levelling of the measuring platform or measuring station is done in-house, levelling equipment is required. A hose level is inadequate!

Skilled handling of measuring equipment and measuring platform.

Sliding plates with transverse motion (rotary motion) at the rear axle are advisable.

Observe the Technical Literature of Porsche AG, the manufacturer of the measuring equipment and the manufacturer of the measuring platform.

Do not treat measured values as a whole, but very critically in regard to driving dynamics, high-speed strength of the tyres, tyre wear and cost/benefit effects (time required for correction of unimportant deviations). The toe values are of decisive significance for driving dynamics and tyre wear.

If the vehicle is measured front and rear, check and adjust the wheel alignment values at the rear axle first. The camber values at the front axle are valid if the wheels are in the straight-ahead position. Steering wheel and steering gear in centre position when toe is being adjusted.

Before wheel alignment values are adjusted at the front and rear axles, it is recommended that the vehicle height be checked at curb weight. Conclusions can then be drawn about wheel alignment values in the event of any suspension alignment that becomes necessary later.