SUBFRAME, Servicing, Aluminum SUBFRAME

WARNING: This page is about a different car, the 2023 Audi S3, 2023 Audi RS 3, 2023 Audi A3 Quattro, and 2023 Audi A3. However, it is still accessible from the selected car via links, so may be relevant.

Special tools and workshop equipment required

Safety Gloves
Protective headgear with visor
Press Plate:VW401

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Press Piece - Multiple Use:VW412

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Hydraulic Press:VAS6178

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Pneumatic/Hydraulic Foot Pump:VAS6179

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Pneumatic/Hydraulic Foot Pump - Pressure Gauge:VAS6179/1

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Hydraulic Press - Bushing Tool Kit:VAS6779 with Support Ring - Assembly Device Kit:VAS6779/11 or Hydraulic Press - Bushing Tool Kit:VAS6779A

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Bearing Installer - Wheel Hub/Bearing Kit - Pressure Head:T10205/13 from the Bearing Installer - Wheel Hub/Bearing Kit:T10205A

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Replacing the Bonded Rubber Bushing for the Pendulum Support.

-- Remove the pendulum support. Refer to PENDULUM SUPPORT, REMOVING AND INSTALLING .

-- Remove the left and right nuts -1- from the coupling rod -3- to do so counterhold with a four-point socket on the threaded pin.

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-- Remove the left and right coupling rod from the stabilizer bar -2-.

-- Remove the bolts -1- for the stabilizer bar.

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Leave the stabilizer bar in the installation position on the vehicle.

Bonded Rubber Bushing, Pressing Out

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-- Position the special tool as shown:

Rubber Bushing Assembly Device Kit - Threaded Rod:VAS6779/2
Rubber Bushing Assembly Device Kit - Hexagon Nut:VAS6779/3
Hydraulic Press:VAS6178 with Bearing Installer - Wheel Hub/Bearing Kit- Adapter 13:T10205/13
Rubber Bushing Assembly Device Kit - Thrust Piece:VAS6779/5
Rubber Bushing Assembly Device Kit - Tube:VAS6779/4
Position the Hydraulic Press - Bushing Tool Kit -Thrust Piece:VAS6779/1 -1- with the flat side -arrow- in the direction of travel on the bonded rubber bushing.

-- Position the tool exactly flush in alignment of the bonded rubber bushing, to prevent tilting.

-- Pay attention that the Rubber Bushing Assembly Device Kit - Hexagon Nut:VAS6779/3 is seated correctly.

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-- The guide from the Hexagon Nut:VAS6779/3 -U- must be seated in the Bearing Installer - Wheel Hub/Bearing Kit -Thrust Piece:T10205/13 -W-

-- The Hexagon Nut:VAS6779/3 -U- must be installed flush on the Bearing Installer - Wheel Hub/Bearing Kit -Thrust Piece:T10205/13 -W-.

-- Connect the special tools as shown.

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Hydraulic Press:VAS6178
Pneumatic/Hydraulic Foot Pump - Pressure Gauge:VAS6179/1
Pneumatic/Hydraulic Foot Pump:VAS6179

-- Pull the control knob on the pressure relief valve for the Pneumatic/Hydraulic Foot Pump:VAS6179 to level -1-.

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The control knob must be in the position -1-. The setting is a maximum pressure of 200 bar (2, 900.76 psi). In position -2- (700 bar (10, 152.66 psi)) the nominal load of the spindle is exceeded.

CAUTION:

Risk of destroying components due to the pressure setting being too high.

- Never set the pressure greater that the specified (position 1 = 20 MPa).

CAUTION:

Risk of personal injury and property damage caused by the spindle breaking or the assembly tool deforming. Uncontrolled flying broken pieces possible.

- Wear safety gloves.

- Wear protective headgear with a visor.

- Pay attention when operating the foot pump, to not push the switch button in the lower position.

-- Carefully operate the Pneumatic/Hydraulic Foot Pump:VAS6179 while monitoring the pressure indicator on the Pneumatic/Hydraulic Foot Pump - Pressure Gauge:VAS6179/1 -1-.

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-- Make sure that the indicator stays in the green display area. Do not exceed the maximum permitted pressure of 200 bar (2, 900.76 psi).

-- Press out both bonded rubber bushings until the upper bonded rubber bushing -2- is visible in the pendulum support opening -arrow- in the subframe.

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-- Perform a visual inspection of the upper bonded rubber bushing outer race -2-.

If the upper bonded rubber bushing outer race -2- is deformed, it must be destroyed through the opening for the pendulum support -arrow- in the subframe.

-- Using a chisel or similar tool -1-, make a break in the upper bonded rubber bushing outer race -2-.

This work sequence is necessary to prevent tilting of the bonded rubber bushing outer race in the area of the pendulum support opening in the subframe.

-- Completely press out both bonded rubber bushings at the same time.

If the procedure does not work with the pressure specified, the repair setup must be checked. Submit feedback if necessary.

Preparing Bonded Rubber Bushings Before Pressing In

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-- Place the bonded rubber bushings -1 and 2- on top of each other, so the openings -arrows- lay exactly over each other.

-- Tighten the bonded rubber bushings with the original bolts -3- hand tight.

-- Apply the red marking in phases as shown on the illustration. Dimension of the phase approximately 1 mm.

-- Place the bonded rubber bushing -1- with the bolt head facing up in the larger diameter of the Hydraulic Press - Bushing Tool Kit - Funnel :VAS6779/6 -2-.

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-- Align the boded rubber bushing in the Hydraulic Press - Bushing Tool Kit Funnel:VAS6779/6 .

The bonded rubber bushing opening -arrows- must lay exactly in the recess on the Hydraulic Press - Bushing Tool Kit - Funnel:VAS6779/6 .

-- Position the special tool as shown:

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Press Piece - Multiple Use:VW412
Rubber Bushing Assembly Device Kit -Thrust Piece:VAS6779/5 , the side with the letter "A" points upward
Bonded Rubber Bushing
Rubber Bushing Assembly Device Kit - Funnel:VAS6779/6
Rubber Bushing Assembly Device Kit - Tube:VAS6779/4
Press Plate:VW401

-- Press the bonded rubber bushing in the Rubber Bushing Assembly Device Kit - Funnel:VAS6779/6 -4- all the way on the Rubber Bushing Assembly Device Kit - Thrust Piece:VAS6779/5 -2-.

-- Deburr the edge -1- at the top in the opening for the pendulum support in the subframe -2- as shown with a file to the dimension -a-.

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Dimension -a- = 1 mm.

-- Turn the Support Ring:VAS6779/11 -1- in the direction of -arrow- so that the tab -left arrow- points to the rear.

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-- Position the Counterholder:VAS6779/7 -1- from the left onto the Support Ring:VAS6779/11 -2- in the direction of -arrow-.

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-- Position the Insert:VAS6779/7-1A - 1- in the opening -lower arrow- for the pendulum support in the subframe at the same time push the insert -1- all the way upward and tighten using the bolt -upper arrow-.

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-- Make sure that the Insert:VAS6779/7-1A is seated correctly in the pendulum support opening in the subframe.

Bonded Rubber Bushing, Pressing In

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-- Remove the pendulum support from the boded rubber bushing.

-- Install the Hydraulic Press - Bushing Tool Kit -Threaded Rod:VAS6779/2 -7- in the Rubber Bushing Assembly Device Kit - Counterhold:VAS6779/7 -1-.

-- Position the special tool as shown:

Rubber Bushing Assembly Device Kit - Counterhold:VAS6779/7
Hydraulic Press - Bushing Tool Kit - Funnel:VAS6779/6 , -arrow marking- on the funnel must be opposite of both bolts in the center -arrow A-.
Rubber Bushing Assembly Device Kit - Thrust Piece:VAS6779/9
Incremental Ring:VAS6779/8 , the marking -III- on the incremental ring must point toward the cam -arrow B- on the Thrust Piece:VAS6779/9 .
Hydraulic Press:VAS6178 with Bearing Installer - Wheel Hub/Bearing Kit- Adapter 13:T10205/13
Rubber Bushing Assembly Device Kit - Hexagon Nut:VAS6779/3
Rubber Bushing Assembly Device Kit - Threaded Rod:VAS6779/2

-- Connect the special tools as shown.

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Hydraulic Press:VAS6178
Pneumatic/Hydraulic Foot Pump - Pressure Gauge:VAS6179/1
Pneumatic/Hydraulic Foot Pump:VAS6179

-- Pull the control knob on the pressure relief valve for the Pneumatic/Hydraulic Foot Pump:VAS6179 to level -1-.

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The control knob must be in the position -1-. The setting is a maximum pressure of 200 bar (2, 900.76 psi). In position -2- (700 bar (10, 152.66 psi)) the nominal load of the spindle is exceeded.

CAUTION:

Risk of destroying components due to the pressure setting being too high.

- Never set the injection pressure greater that the specified (position 1 = 20 MPa).

CAUTION:

Risk of personal injury and property damage caused by the spindle breaking or the assembly tool deforming.

- Wear safety gloves.

- Wear protective headgear with a visor.

- Pay attention when operating the foot pump, to not push the switch button in the lower position.

-- Carefully operate the Pneumatic/Hydraulic Foot Pump:VAS6179 while monitoring the pressure indicator on the Pneumatic/Hydraulic Foot Pump - Pressure Gauge:VAS6179/1 -1-.

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-- Make sure that the indicator stays in the green display area. Do not exceed the maximum permitted pressure of 200 bar (2, 900.76 psi).

-- Press in both bonded rubber bushings at the same time.

To prevent damage to the bonded rubber bushing outer race, while pushing in, pay attention that it is not tilted at the beginning.
If necessary, release the tension and press in using the Pneumatic/Hydraulic Foot Pump:VAS6179 .

CAUTION:

Risk of destroying components due to the pressure setting being too high.

- Never select the foot pump mode with the higher pressure.

If the pressing in does not work with the pressure specified, the repair setup must be checked.

-- Remove special tool from the subframe and check seating of the pressed in bonded rubber bushing.

Further installation is performed in reverse order of the removal.

Tightening Specifications

Refer to OVERVIEW - SUBFRAME
Refer to OVERVIEW - ASSEMBLY MOUNTS .