SUBFRAME, Securing

WARNING: This page is about a different car, the 2021 Audi S4 and 2021 Audi A4 Quattro. However, it is still accessible from the selected car via links, so may be relevant.

Special tools and workshop equipment required

Torque Wrench 1331 5-50Nm :VAG1331
Torque Wrench 1332 40-200Nm :VAG1332
Engine and Gearbox Jack :VAS6931
Gearbox Support :T40173
Rear Axle Support :T10552
Locating Pins :T40327

Tools, Preparing

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-- Loosen the bolts -arrows-.

-- Adjust the dimension -a-.

Dimension -a- = 250 mm

-- Tighten the bolts again.

Procedure

-- Equipped on some models: remove the left and right diagonal brace. Refer to DIAGONAL BRACES, REMOVING AND INSTALLING

-- Remove the muffler. Refer to MUFFLER, REMOVING AND INSTALLING .

-- Remove the left and right spring. Refer to SPRING, REMOVING AND INSTALLING .

AWD Equipment Versions with Rear Final Drive Installed

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-- Support the subframe using the :VAS6931 and :T40173 as shown on the rear final drive and on the subframe.

FWD or AWD Equipment Versions with Rear Final Drive Removed

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-- Equipment versions with gas fuel systems: remove the nuts -arrows-, and remove the wind deflector -1-.

-- If necessary, bring the stabilizer bar into the installation position and secure it with bolts.

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-- Position the :T10552 with the :VAS6931 under the subframe and lift.

-- Bring the :T10552/2 all the way on the stabilizer bar.

-- Place the :T10552/1 all the way into the rear holes on the subframe by turning left and right at the threaded sleeve.

Continuation:

-- Secure the subframe with the tensioning strap from the engine and gearbox jack.

CAUTION:

There is a risk of damaging the threads on the subframe threaded connection to the body.

The subframe bolts on the body must not be loosened or tightened with an impact wrench.
Always install all bolts by hand for the first few turns.

-- Remove the left and right bolt -2- from the rear subframe one after the other and install a locating pin from the :T40327 .

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NOTE:

If the locating pin cannot be inserted, rework the stop plate in the subframe mount near the retaining tabs slightly with a file.

-- Tighten locating pin to 20 Nm.

The subframe position is now secured.

-- Remove the left and right bolts -1- from the subframe.

Remove the :T40327

Removal is performed in the reverse order. Note the following:

CAUTION:

There is a risk of damaging the threads on the subframe threaded connection to the body.

The subframe bolts on the body must not be loosened or tightened with an impact wrench.
Always install all bolts by hand for the first few turns.

WARNING:

Risk of accident!

If the vehicle will be driving on the streets, all bolts and nuts must be tightened properly according to the guidelines.

-- Install the springs. Refer to SPRING, REMOVING AND INSTALLING .

-- 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 - MUFFLER .
Refer to OVERVIEW - UNDERBODY BRACING .
Refer to OVERVIEW - UNDERBODY TRIM PANELS .
Refer to WHEELS AND TIRES