987S Alignment Settings

[percymon]

Anyone have the data for the wheel alignments ? My local tyre shop guys have the latest software upgrades for their laser alignment equipment, but it doesn't specifically mention the 987 models; or anything about about differences for 19" wheels and PASM.

Thanks

[Porschelibrarian]

Anyone have the data for the wheel alignments ? My local tyre shop guys have the latest software upgrades for their laser alignment equipment, but it doesn't specifically mention the 987 models; or anything about about differences for 19" wheels and PASM.

Thanks

Again seems like you need the workshop manual...

Here is the pages on the allignments direct from POSES!

WARNING

Danger of losing text-figure correspondence when printing out.

For technical reasons, it can currently not be ruled out that the correspondence between text and associated figure can be lost when it is printed out, even though the display on the screen is correct.

If the fault is not noticed, there is the danger that work will not be performed correctly which can cause injury and damage.

→ Therefore, always compare printouts with the screen display after printing them out. Correct the printouts if they are faulty so that the content of the screen display matches that on the printouts.

AVERTISSEMENT

Risque de perte de la correspondance texte-illustration lors de l'impression papier.

Pour des raisons techniques, il ne peut pas être exclu à l'heure actuelle que, même en cas d'affichage correct à l'écran, la correspondance entre le texte et l'illustration puisse être erronée sur l'impression papier.

Si l'erreur passe inaperçue, on court le risque d'exécuter certaines opérations de manière incorrecte pouvant conduire à des dommages corporels et matériels.

→ Comparez impérativement pour cette raison les impressions papier avec l'affichage à l'écran. Corrigez-les en cas d'erreur de manière à reproduire correctement l'affichage à l'écran.

ATTENZIONE

Pericolo di perdita dell'abbinamento testo-immagine nella stampa.

Per motivi tecnici non è escluso che, nonostante la rappresentazione sullo schermo risulti perfetta, durante la stampa venga persa la corrispondenza fra testo e relativa immagine.

Se tale difetto non viene rilevato vi è il pericolo che i lavori non siano eseguiti correttamente; ciò può avere come conseguenza lesioni e danneggiamenti.

→ Per questo motivo, dopo la stampa è assolutamente necessario confrontare le stampe con la rappresentazione sullo schermo. In caso di errore si prega di correggere le stampe, così da garantire la riproduzione esatta della rappresentazione sullo schermo.

ADVERTENCIA

Al imprimir se corre el riesgo de perder la correcta asignación de las figuras al texto.

Por motivos técnicos, por el momento no se puede descartar que, aun siendo correcta la imagen que aparezca en la pantalla, al imprimir se pierda la correlación entre el texto y la figura correspondiente.

Si este error pasara desapercibido, existe el riesgo de que los trabajos no se ejecuten de forma correcta y, por tanto, se produzcan daños personales y materiales.

→ Por ello le rogamos que tras el proceso de impresión compare siempre las copias impresas con la imagen de la pantalla. En caso de error, corrija las copias impresas de forma que se correspondan con el contenido de la imagen de la pantalla.

44 95 03 Suspension alignment, complete - as of MY 2005

- Information

- Aligning vehicle at front and rear

Tools

Designation Type Number Explanation

socket wrench insert special tool P 9730

top of page

Information

General procedure for wheel alignment

Performing wheel alignment using an electronic wheel alignment tester. Measurement procedures should be taken from the operating instructions for the wheel alignment tester involved.

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

Empty weight of vehicle according to DIN 70020, i.e. vehicle in ready-to-drive condition with full tank and including tools but without driver or additional weights.

Ball-joint and wheel-bearing play in order (wheel-bearing play cannot be adjusted).

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

Quick-clamping holder with adapter (for the measured-value pickups) correctly secured to the wheels.

Receiving surfaces for the quick-clamping holder on the wheels and the adapter surfaces 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 gauge is not adequate.

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 PAG, 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 insubstantial 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. Camber values at the front axle apply for the straight-ahead position of the wheels. Steering wheel and steering gear in centre position when toe is being adjusted.

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

top of page

Aligning vehicle at front and rear

Vehicle height (height check)

General

The vehicle height at front and rear axle is not adjustable.

Preliminary work

For the height check, place the vehicle on a level surface or on the measuring platform (ready to drive, with a full tank and tools but without driver or additional weights). Compress (push down) vehicle at front and rear axles 2-3 times and allow it to spring back freely.

Front axle

Measuring height of front axle (left-hand side)

From road contact surface to hexagon-head bolt of cross-member screw connection to the body.

Nominal value for front and rear axles → 441000 Adjustment values for suspension alignment.

Rear axle

Measuring the height of the rear axle (right-hand side)

Measure from wheel contact area up to lower edge of diagonal brace (at control arm fastening point).

Wheel alignment

WARNING

Risk of accident due to incorrect functioning of steering angle sensor if it is uncalibrated or incorrectly calibrated.

There is a risk of accidents causing physical damage to persons or objects in the PSM testing area.

→ After working on wheel suspension parts, when replacing the steering-angle sensor and after changing the wheel alignment values, calibrate the steering angle sensor with the front wheels in straight-ahead position using the PIWIS tester.

→ Check the actual value of the steering angle sensor after a suspension alignment where no changes were made to the wheel alignment values.

Notes

Only check or adjust wheel-alignment values when prescribed preconditions are met. → 449503 Suspension alignment complete - chapter on "Information"

If the vehicle is measured front and rear, check and adjust the rear axle first. After adjustment, tighten the appropriate threaded connections with the prescribed tightening torque. See tables in Repair Group 40 → 401000 Tightening torques for front axle and Repair Group 42 → 421000 Tightening torques for rear axle.

The steering-angle sensor must be calibrated if the previous wheel alignment values (on rear and/or front axle) were changed!

Rear axle

Preliminary work

Prepare vehicle for checking and/or adjustment of wheel alignment values. Place front wheels on rotary table and rear wheels on rotary / sliding plates. Compress vehicle at front and rear axles by approximately 25 mm 2-3 times and allow it to spring back freely.

Adjusting camber

Toe and camber eccentrics

After loosening the lock nut, turn eccentric -B- appropriately.

Note

Due to the restricted space, to tighten the lock nut of the left camber eccentric, use a 3/8 inch torque wrench (covering the range of 100 Nm (74 ftlb.)) together with a 18 mm socket-wrench insert.

3/8 inch torque wrenches and 3/8 inch socket-wrench inserts have a smaller height than tools of the same size in a 1/2 inch version.

Tighten lock nut from camber eccentric to the prescribed tightening torque → 421000 Tightening torques for rear axle. To do this, use a 3/8 inch torque wrench (covering the range of 100 Nm (74 ftlb.)) together with an 18 mm socket-wrench insert on the left side.

Adjusting toe

Toe and camber eccentrics

After loosening the lock nut, turn eccentric -A- appropriately.

After adjusting, tighten the lock nut of the toe eccentric to the prescribed tightening torque → 421000 Tightening torques for rear axle.

Front axle

Adjusting camber

Adjusting camber

The camber is adjusted by moving the spring strut transversely. For this purpose, undo the three fastening nuts on the spring-strut mount and, to move the spring strut, remove the covering cap on the piston rod.

Adjusting caster

The caster is not adjustable on standard vehicles.

Adjusting toe

Preliminary work: Check whether the steering wheel is displaced with respect to the steering gear. To do this, centre the steering gear as described below.

Turn wheels to the straight-ahead position.

Steering in centre position

Then re-adjust the front wheel alignment, if necessary, until bolt -2- in driver -1- and the lug on the steering gear housing -4- line up.

Steering in centre position

No. 3 is the desired breaking point for bolts in new steering gears. The (new) bolt -2- is inserted into driver -1- and lies with its underside in lug -4- . This locks the steering gear in the centre position. After installation of a new steering gear, the lower part of the bolt is sheared off (at desired breaking point -3- ) by turning the steering wheel. The upper part of the bolt -2- remains in the driver.

Mark for the centre steering position

If necessary, reposition the steering wheel. When doing this, seek the best position.

WARNING

A triggering of the airbag (malfunction in the airbag system) caused by improper work on airbag components cannot be ruled out. In the case of such a malfunction, an unsuitable steering wheel holder could cause injury or damage.

→ Use only steering wheel holders that do not project into the area of the airbag unit!

→ Observe safety regulations when working with airbag vehicles (see in Repair Group 69)!

Steering wheel holder

Clamp steering wheel in centre position with steering wheel holder -A- . Use only steering wheel holders that do not project into the area of the airbag unit -B- ! If necessary, shorten the guiding rod of the steering wheel holder at top -Arrow- .

Adjusting toe

Loosen tie rod lock nut(s) -2- . When loosening and tightening the tie rod lock nut(s) counter on the square of the tie rod -3- , with an open-ended wrench. Then adjust the toe on the hexagon -1- of the tie rod(s). Then tighten the tie rod lock nut(s) -2- to the prescribed tightening torque.

Loosening and tightening tie rod lock nuts

Use special tool (socket wrench insert) P 9730 -A- together with a torque wrench -B- to loosen and tighten the tie rod lock nut(s). The tightening torque of 50 Nm (37 ftlb.) for the tie rod lock nut(s) corresponds to a value of approx. 32.5 Nm (24 ftlb.) when using a socket wrench insert P 9730.

Toe-difference angle

The toe-difference angle is not adjustable.

The steering angle sensor must be calibrated if the previous wheel alignment values (on rear and/or front axle) were changed.

[Chris_911]

Had the same problem here in the UK at the weekend - the place I use for all my tyres and alignment doesn't have the 987 data.

The post above gives the 'how to' of alignment, but what are the actual settings?

Thanks.

[Chris_911]

Ah well, looks like nobody on here knows.

Have to see if I can get the information our of my dealer.

[robcorn]

Ah well, looks like nobody on here knows.

Have to see if I can get the information our of my dealer.

Chris, here you go, this is what I had from Ruf AutoCentre:

Camber:

Front Left: -0.67 to 0.33 degrees

Front Right: -0.67 to 0.33 degrees

Rear Left: -1.83 to -0.83 degrees

Rear Right: -1.83 to -0.83 degrees

Caster:

Front Left: 7.50 to 8.50 degrees

Front Right: 7.50 to 8.50 degrees

Toe:

Front Left: 0.00 to 0.08 degrees

Front Right: 0.00 to 0.08 degrees

Rear Left: 0.00 to 0.17 degrees

Rear Right: 0.00 to 0.17 degrees

Front:

Cross Camber: -0.33 to 0.33 degrees

Cross Caster: -0.67 to 0.67 degrees

Total Toe: 0.00 to 0.17 degrees

Turning Angle Diff: -2.17 to -1.17

Rear:

Cross Camber: -0.33 to 0.33 degrees

Total Toe: 0.00 to 0.33 degrees

Thrust Angle: -0.17 to 0.17 degrees

Hope this is what you're looking for. If you need more info, let me know.

Thanks,

Rob

[Chris_911]

Fabulous Rob - Thank you!