Installing Lower Trailing Arm

WARNING: This page is about a different variant/trim than selected.

Move lower trailing arm into installation position.
Fasten lower trailing arm -1- on the front-axle cross member using a new screw and a new collar nut.

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Mounting for lower trailing arm on front-axle cross member
1. 2.1 Fit threaded connection -2- (do not tighten!).
Secure control arm -1- on the lower trailing arm with a screw and collar nut.

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Mounting for control arm
1. 3.1 Fit threaded connection -2- (do not tighten!).
  Information
  
  > Refer to the appropriate Service Information for 405001 Spare parts requirements for wheel carrier/transverse control arm on front axle - Check component pairing, a mixed installation is not permitted (158/20)
  - On the 992 Turbo, there is a standard change to the lower trailing arm, taper bushing and wheel bearing housing on the front axle to the other standard version of the 992 variants.
  - The threaded connection between the ball joint and wheel carrier has beet changed from the M12 thread to the M14 thread.
  - Turbo S vehicles were still built with the M12 thread variant (about 3, 000 vehicles) from the market launch of the model up to (week 46/2020).
  - For repairs to wheel carriers/control arm, always read Technical Information 158/20 for the 992 Turbo S:

Secure lower trailing arm -1- to the wheel bearing housing.

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Mounting for lower trailing arm on wheel bearing housing

4.1 Variant 1: Tighten M12 nut -2- .
> Tightening torque 100 Nm (74 ftlb.)
4.2 Variant 2: Tighten M14 nut -2- .
> Tightening torque 160 Nm (118 ftlb.)

4.3 Seal projecting thread after the threaded joint on the wheel bearing housing -Illustration- with wax as required. Use Pfinder AP14/14 for this (see Parts Information)

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Applying wax on marked area

WARNING: Wheel bearing housing raised incorrectly

Risk of crushing
Risk of damage to components
→ Wear personal protective gear.

→ Do not raise the wheel suspension higher than the normal vehicle position (vehicle resting on wheels).

Information

Threaded joints must only be tightened in zero position to prevent warping in the bearings.

Tighten threaded connections in zero position.

5.1 Lift the wheel bearing housing as far as required using > VAS 6931 - engine and gearbox jack until the lower trailing arm is horizontal. > Zero position

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Zero position

5.2 Tighten threaded connection -2- for lower trailing arm -1- .

> Initial tightening 70 Nm (52 ftlb.) > Final tightening + 180°

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Mounting for lower trailing arm on front-axle cross member

5.3 Secure screw connection -2- from control arm to lower trailing arm. > Tightening torque 160 Nm (118 ftlb.)

> Tightening torque 160 Nm (118 ftlb.)

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Mounting for control arm

Install holder for front angle sensor for headlight beam adjustment -1- .

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Mounting for angle sensor for headlight beam adjustment
1. 6.1 Tighten screws -2- .
  > Tightening torque 8 Nm (6 ftlb.)
Fasten brake disc -1- air guide with new tie-wraps.

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Mounting for brake disc air guide
1. 7.1 Tighten tie-wraps -2- using > VAS 6927 - tie-wrap pliers .
Install cover on lower trailing arm -1- .

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Mounting for cover on lower trailing arm
1. 8.1 Tighten screws -2- .
  > Tightening torque 10 Nm (7.5 ftlb.)