SUBFRAME, Securing

WARNING: This page is about a different car, the 2024 Audi SQ8, 2024 Audi Q8, 2023 Audi SQ8, and 2023 Audi Q8. However, it is still accessible from the selected car via links, so may be relevant.

Special tools and workshop equipment required

Engine and Gearbox Jack:VAS 6931

Fig 1: Engine and Gearbox Jack VAS6931 or VAG1383A
Courtesy of AUDI
Gearbox Support:T40173

Fig 2: Gearbox Support T140173
Courtesy of AUDI
Locating Pins:T40327

Courtesy of AUDI

Procedure

Vehicles with active suspension: pay attention to the safety precautions. Refer to SAFETY PRECAUTIONS WHEN WORKING ON VEHICLES WITH ACTIVE SUSPENSION .

-- Support the engine in the installation position. Refer to ENGINE, SUPPORTING IN INSTALLATION POSITION .

-- Remove the front wheels. Refer to WHEELS AND TIRES .

-- Remove the noise insulations. Refer to OVERVIEW - NOISE INSULATION .

-- Remove the left and right wheel housing liner front sections. Refer to OVERVIEW - FRONT WHEEL HOUSING LINER .

-- Support the subframe with the Engine and Gearbox Jack:VAS 6931 and the Gearbox Support:T40173 . (Shown on a vehicle without sway stabilization).

Courtesy of AUDI

-- Secure the subframe with the tensioning strap -arrow-.

CAUTION:

Improper handling increases the risk of damaging the threads in the vehicle body.

- Never use an impact wrench to loosen or tighten.

- Position the bolts by hand only and screw in the first threads.

To secure the subframe the Gearbox Support Locating Pins:T40327 must be installed one after the other on the left and right at the positions -1 and 2-.

Fig 3: Identifying Subframe Bolts
Courtesy of AUDI
The locating pins must only be tightened to a maximum of 20 Nm or else the locating pin bolts will be damaged.
Due to the ribbed washers for the bolts, the holes for the subframe are slightly peened. They must be deburred if necessary.

-- Replace the bolts -1 and 2- one after the other on both sides of the vehicle via the Locating Pins Locating Pins:T40327 and tighten to 20 Nm.

The suspension is now secured.

-- Remove the left and right bolts -3-.

Remove the Locating Pins Locating Pins:T40327

Removal is performed in the reverse order.

-- Only remove one locating pin at a time in a diagonal sequence. Install and tighten a new bolt in this location.

CAUTION:

Improper handling increases the risk of damaging the threads in the vehicle body.

- Never use an impact wrench to loosen or tighten.

- Position the bolts by hand only and screw in the first threads.

-- Remove the Engine Support Set:10-222B . Refer to ENGINE, SUPPORTING IN INSTALLATION POSITION .

CAUTION:

There is a risk of accident due to threaded connections that are not tightened correctly.

- Tighten threaded connections correctly before driving on public roads.

-- A road test must be performed after completing repairs. If the steering wheel is crooked, the wheels must be aligned. Refer to AXLE ALIGNMENT .

Tightening Specifications

Refer to OVERVIEW - SUBFRAME
Refer to OVERVIEW - NOISE INSULATION .
Refer to OVERVIEW - FRONT WHEEL HOUSING LINER .
Refer to WHEELS AND TIRES