SUBFRAME, Securing
Special tools and workshop equipment required
Prepare the Rear Axle Support:T10552
-- Position the adapter :T40386/1 and nut :T40386/2 on the support :T10552/2 and tighten by hand with the bolt -arrow-.
-- Loosen the bolts -arrows-.
-- Adjust the dimension -a-.
- Dimension -a- = 250 mm.
-- Tighten the bolts to 10 Nm.
-- Loosen the bolt -right arrow-.
-- Adjust the dimension -b-.
- Dimension -b- = 370 mm.
-- Tighten the bolt -arrow- to 10 Nm.
-- Loosen the left and right lower Support Bolts:T10552/1 -3-.
-- Adjust the dimension -c-.
- Dimension -c- = 155 mm.
-- Turn the left and right threaded sleeves on the Support Bolts:T10552/1 -3- until the dimension -d- is reached.
- Dimension -d- = 185 mm.
-- Position the adapter :T40386/1 and nut :T40386/2 on the support :T10552/2 and tighten by hand with the bolt -arrow-.
-- Place the Rear Axle Support:T10552 -1- on the Engine and Gearbox Jack:VAS 6931 -2-.
-- Tighten the bolt -right arrow-.
- M6: 5 Nm.
- M8: 10 Nm.
Procedure
There is a risk of an accident due to an unsecured engine/transmission subassembly!
- The engine must be supported in the installation position for the following steps.
-- Support the engine in the installation position. Refer to ENGINE, SUPPORTING IN INSTALLATION POSITION - 2.0L .
-- Remove the front wheels. Refer to WHEELS AND TIRES .
-- Remove the noise insulation. Refer to NOISE INSULATION, REMOVING AND INSTALLING .
-- Remove the left and right wheel spoiler. Refer to OVERVIEW - FRONT WHEEL HOUSING LINER .
-- A5 Cabriolet: remove the diagonal braces. Refer to DIAGONAL BRACES, REMOVING AND INSTALLING .
-- Remove the clip nuts from the crossbrace.
-- Position the Rear Axle Support:T10552 with the Engine and Gearbox Jack:VAS 6931 under the subframe and lift.
-- Bring the Rear Axle Support - Support:T10552/2 with the Adapter:T40386 all the way onto the front crossbrace.
-- Place the Rear Axle Support - Mounting Bolts:T10552/1 all the way into the rear holes on the crossbrace by turning left and right at the threaded sleeve.
-- Secure the crossbrace with a tensioning strap -arrow-.
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.
To secure the subframe, a Locating Pins:T40327 must be installed at position -1- on the left and right side.
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- on both sides of the vehicle with the Locating Pins:T40327 and tighten to 20 Nm.
- The suspension is now secured.
-- Remove the bolts on the left and right side -arrows-.
Remove the Locating Pins:T40327
Removal is performed in the reverse order.
-- Remove the locating pins and tighten a new bolt at this position.
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.
Risk of accident!
- If the vehicle will be driving on the streets, all bolts and nuts must be tightened properly according to the guidelines.
-- Remove the Engine Support Set:10-222B . Refer to ENGINE, SUPPORTING IN INSTALLATION POSITION .
-- 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 - UNDERBODY BRACING .
- Refer to OVERVIEW - FRONT WHEEL HOUSING LINER .
- Refer to WHEELS AND TIRES