Notes on Repair Instructions

Notes on Repair Instructions - GT3

General
The 911 Carrera (996), and also the 911 GT3, is the basic model covered by the repair, assembly and adjustment operations. Only the GT3-specific procedures which deviate from this are additionally described separately.

Tightening torques
Tightening torques for the 911 Carrera (996) and 911 GT3 are almost the same. Tightening torques that deviate or are additional are contained in the tables under the appropriate components.

Adjustment work on the front and rear axle spring struts
The front and rear axle spring strut has a thread and a height adjusting nut No. 2 for height adjustment. The height adjusting nut No. 2 is secured against turning by the lock nut No. 1.
The stabilizer block - No. 4 - (mounting saddle for the stabilizer mount) is also fitted on the thread. The stabilizer block can be vertically adjusted and it is provided with a lock nut No. 3. This adjustment possibility is only useful for racing. It can be used to ensure that enough clearance is available for the stabilizer mount even for deviating vehicle heights (only for racing) and also that the stabilizer mount can be fitted free of tension. The stabilizer block No. 4 does not need to be adjusted for the vehicle height prescribed for street use.








The stabilizer block is also adjusted for replacement dampers.

Note: The special tool 9647 is required together with a torque wrench in order to adjust the vehicle height. Description under 911 GT3 suspension alignment in Wheels, tires, suspension alignment.

Suspension alignment
The adjustment procedures and values on the front and rear axle differ in a number of respects from those of the 911 Carrera (996). Adjustment values in Wheels, tires, suspension alignment. The suspension alignment - 911 GT3 is located behind the suspension alignment for 911 Carrera (996).

Brakes - General
Bleeding and brake fluid change is the same as for 911 Carrera (996). The GT3 is equipped with 3-channel ABS without TC (Traction Control).
The fastening screws on the front axle brake calipers and the rear axle calipers are 5 mm longer than those on the 911 Carrera (996).

Brake unit
If the brake unit is replaced, observe correct allocation according to the Spare Parts Catalogue (modified speed ratio and larger piston diameter in the brake master cylinder) compared with the 911 Carrera (996).

Important: Boost factor GT3 = 3.15 : 1. 911 Carrera (996) = 3.85 : 1.