the left  Figure 10 -3-/right) with a tie-wrap to prevent it from turning.

2.1.7

Remove spreader device (actuator/servo motor – at the left  Figure 10
-3-/right) (  Workshop Manual '468519 Removing and installing spreader device
(actuator)')

2.1.8

Disconnect wire harness for speed sensor (rear left/right) and electronic parking
brake (at the left/right).

2.1.9

Remove rear speed sensor (at
the left  Figure 11 /right) (
 Workshop Manual '451519
Removing and installing rear speed
sensor')

Remove rear-axle wheel carrier (at the
left/right)

Figure 11

2017© Porsche Cars North America, Inc.

Tequipment

Jul 27, 2017
Page 13 of 32

1

911 (991)
1001

ENU

Installation and Conversion Instructions

8/17
2.2.1

Remove tie rod on wheel carrier (at
the left  Figure 12 -1-/right).
1
2

3
4

2.2.2

Remove connecting link
(suspension/stabiliser) on the wheel
carrier (at the left  Figure 12
-2-/right).

2.2.3

Remove upper control arms
(diagonal/transverse) on the wheel
carrier (at the left/right) ( Figure
12).

2.2.4

Figure 12

Remove lower control arms
(diagonal/transverse) on the wheel
carrier (at the left/right) ( Figure
13 ).
1
2
3
4

Jul 27, 2017
Page 14 of 32

– Tie rod (left)
– Connecting link
(suspension/stabilizer –
left)
– Upper control arm –
diagonal (left)
– Upper control arm –
transverse (left)

– Lower control arm –
diagonal (left)
– Lower control arm –
transverse (left)
– Spring strut (left)
– Connecting link
(suspension/stabilizer –
left)

Figure 13

2.2.5

Remove lower spring strut on wheel carrier (at the left  Figure 13 -3-/right).

2.2.6

Carefully pull the wheel carrier (at
the left/right) down off the splines on the rear-axle drive shaft.

Tequipment

2017© Porsche Cars North America, Inc.

Installation and Conversion Instructions
2.2.7

2.3

911 (991)
8/17

ENU

1001

1

Secure the rear-axle drive shaft
(at the left  Figure 14/right)
with tie-wraps or similar fastening
elements in the wheel housing to
prevent it from falling down.

Press new angular-contact ball bearing (wheel
bearing) into the new wheel carrier (at the
left/right)

Figure 14
WARNING
Mechanical, hydraulic or pneumatic press
•

Risk of squashing



Read specific safety information for the press.



Check that the press is working perfectly before use, particularly the safety
components.
2.3.1

Press wheel hub out of the wheel
carrier (at the left/right) ( Figure
15).
1
2
3

– Wheel hub
– VW 454 - Pressure
piece
– Press ram

Figure 15

2017© Porsche Cars North America, Inc.

Tequipment

Jul 27, 2017
Page 15 of 32

1

911 (991)
1001

ENU

Installation and Conversion Instructions

8/17
2.3.2

Press wheel bearing inner ring off
the wheel hub shaft (at the left/right)
( Figure 16 ).
1
2
3

2.3.3

– VAS 6961 - Separating
device
– Wheel bearing inner ring
– Wheel hub shaft

Check wheel bearing seat in the
new wheel carrier (at the left/right)
for sharp edges/burrs.
Remove/de-burr sharp edges/burrs
if necessary.

2.3.4

Figure 16

Heat the wheel carrier (at the left/right) to approx. 176° F (80° C) (max. 212°
F/100° C) using a heating plate.

CAUTION
Hot components
•

Risk of burns



Let hot components cool down.



Wear personal protective gear.

Information

2.3.5

Jul 27, 2017
Page 16 of 32

•

The multipole seal on the wheel bearing must not come into contact with
highly magnetic parts (e.g. a magnetic screwdriver or magnet).

•

Installing the wheel bearing: The magnetic side must be facing the speed
sensor (inside of the wheel bearing housing).

•

Use the T10473 - test card or a paper clip to find the magnetic side.

Position new angular-contact ball bearings (wheel bearings) with the encoder ring
(for the speed signal) facing the wheel carrier (at the left/right) in the wheel carrier
(at the left/right).

Tequipment

2017© Porsche Cars North America, Inc.

Installation and Conversion Instructions

911 (991)
8/17

ENU

1001

1

Information
The press-in process for the angular-contact ball bearing (wheel bearing) must
be performed continuously (without stopping) as soon as the angular-contact ball
bearing (wheel bearing) is inside the wheel carrier!
2.3.6

Carefully press new angular-contact
ball bearings (wheel bearings) into
the wheel carriers (at the left/right).
1
2

3

2.3.7

– Angular-contact ball
bearing (wheel bearing)
– Cover on angular-contact
ball bearing (wheel
bearing)
– Hexagon-head bolt, M8 x
35

Remove cover on angular-contact
ball bearing (wheel bearing) from
the old wheel carrier and fit it on the
new wheel carrier (at the left/right
 Figure 17) with the inscription
facing outwards.
Hexagon-head bolt, M8 x 35:
Tightening torque 37 Nm (27 ftlb.)

Figure 17

2.4

Carefully press the wheel hub until the pressure increases (press) into the wheel bearing
(wheel carrier at the left/right) (  Workshop Manual '425819 Removing and installing rear
wheel bearing').

2.5

Complete the new wheel carriers (at the left/right)

2017© Porsche Cars North America, Inc.

Tequipment

Jul 27, 2017
Page 17 of 32

1

911 (991)
1001

ENU

Installation and Conversion Instructions

8/17
2.5.1

Remove combination holder (at
the left/right) from the old wheel
carrier and fit it on the respective
new wheel carrier using two new
hexagon-head bolts (M6 x 16)
( Figure 18).
1
2

– Combination holder (left)
– Hexagon-head bolt, M6 x
16

Hexagon-head bolt, M6 x 16:
Tightening torque 10 Nm
(7.5 ftlb.)
2.5.2

Grease the seat of the rear speed
sensor on the wheel carrier (at the
left/right) lightly with Optitemp LG2.

2.5.3

Insert rear speed sensor (at the
Figure 18
left/right) and fit using a cheese
head bolt (M6 x 16) (  Workshop Manual '451519 Removing and installing rear
speed sensor')
Cheese head bolt, M6 x 16: Tightening torque 10 Nm (7.5 ftlb.)
Information

2.6

•

Use correct tightening torques and torque angle.  Workshop Manual '4X00IN
Tightening torques for rear axle'.

•

Always replace fastening screws that are tightened to a torque angle.

•

Use Optimoly HT to lightly grease the drive shaft toothing and axle nut thread.

•

Replace lock nuts.

Install rear-axle wheel carriers (at the left/right) (  Workshop Manual '425219 Removing
and installing rear wheel bearing housing')
2.6.1

Use Optimoly HT to lightly grease the (rear-axle) drive shaft splines and axle nut
thread.

2.6.2

Fit rear-axle wheel carrier (at the left/right) on the respective drive shaft and screw
new hexagon nut (M22 x 1.5) loosely on the drive shaft.
Secure the rear-axle wheel carrier (at the left/right) with lifting equipment to prevent
it from falling down.

2.6.3

Jul 27, 2017
Page 18 of 32

Loosely pre-fit all control arms (upper/lower), tie rods and the lower spring strut
on the respective rear-axle wheel carrier (at the left/right) using new hexagon-head
bolts and hexagon nuts.

Tequipment

2017© Porsche Cars North America, Inc.

Installation and Conversion Instructions

2.7

911 (991)
8/17

ENU

1001

1

2.6.4

Move the rear-axle wheel carrier (at the left/right) up into "ZERO position" using a
jack. Lower control arms are horizontal, parallel to the vehicle floor.

2.6.5

Tighten all threaded connections (control arms (upper/lower), tie rods and
lower spring strut) on the rear-axle wheel carrier (at the left/right) to the correct
tightening torque/torque angle.

Install rear-axle brake system
2.7.1

Install spreader device (actuator/servo motor – left/right) on the wheel carrier
(at the left/right) using two new screws (M8 x 38) (  Workshop Manual '468519
Removing and installing spreader device (actuator)').

2.7.2

Install brake anchoring plate (left/right) on the rear-axle wheel carrier (at the
left/right) using four new hexagon-head bolts (M6 x 16) (  Workshop Manual
'468320 Removing and installing brake shoe').

2.7.3

Install parking brake shoes (  Workshop Manual '468320 Removing and installing
brake shoe').
Information
There is no need to grind down the parking-brake shoes if the parking-brake shoes
are not replaced.
Set the brake shoes to the basic setting if necessary and calibrate the brakes 
Workshop Manual '468315 Adjusting and calibrating parking-brake shoes'.
•

Mark the parking-brake shoes and adjustment device according to their installation position.

•

Secure the adjustment device to prevent it from turning.

2.7.4

Calibrate parking brake shoes (  Workshop Manual '468316 Adjusting brake
shoes').

2.7.5

Install brake disc (at the left 
Figure 19 -3-/right) using two
countersunk screws (M6 x 12)
(  Workshop Manual '465319
Removing and installing rear brake
disc').
1
2
3

2.7.6

– Brake caliper (left)
– Hexagon nut, M22 x 1.5
– Brake disc (left)

Fit brake caliper (at the left 
Figure 19 -1-/right) on each wheel
Figure 19
carrier using new cheese head
bolts (M12 x 1.5 x 85) (  Workshop Manual '474119 Removing and installing rear
brake calliper').

2017© Porsche Cars North America, Inc.

Tequipment

Jul 27, 2017
Page 19 of 32

1

911 (991)
1001

ENU

Installation and Conversion Instructions

8/17
2.7.7

Fit new rear-axle trailing arm spoiler
on the lower control arm (at the
left/right) (  Workshop Manual
'421119 Removing and installing
lower trailing arm')
1
2

– Rear-axle trailing arm
spoiler (left)
– Lower control arm –
transverse (left)

Information
The humps on the lower transverse
control arm must be inside the
vertical bars of the rear-axle trailing
arm spoiler!
•

•
•

2.7.8

3

Figure 20
Remove old rear-axle trailing
arm spoiler (brake ventilation, if installed) on the lower transverse control arm
(at the left/right).
Position new rear-axle trailing arm spoiler on the humps ( Figure 20
-arrows-) on the lower transverse control arm (at the left/right).
Fit a tie-wrap around the lower transverse control arm (at the left/right) and
fasten using VAS 6927 - tie-wrap pliers.

Fit electric wire harnesses (ABS/spreader device – actuator/servo motor) on the
wheel carrier brackets (at the left/right).

Convert turbochargers (see also:  Workshop Manual '213019 Removing and installing
turbocharger').
3.1

Remove turbocharger (cyl. 1–3/cyl. 4–6)
3.1.1

Remove Torx screw (M6 x 12) on oil supply line/turbocharger oil tank flange (cyl.
1–3  Figure 21 -1-/cyl. 4–6).
Information

Jul 27, 2017
Page 20 of 32

Tequipment

2017© Porsche Cars North America, Inc.

Installation and Conversion Instructions

911 (991)
8/17

ENU

1001