No. 16-25 Service Bulletin/Repair Instructions

Installation and Conversion Instructions
911 (992)

16 / 25 ENU
4400
4
Manthey Chassis GT3 992.2

Vehicle Type:
992.2 GT3
Model Year:
As of 2025
Information:
Retrofitting
Information

Please pass all this information on to the customer.

In addition, provide the customer with the Race Circuit brochure included with the scope of parts.

Parts Info:
99204485815

or

99204485810
1x
992-II GT3 Manthey KW no Lift
1x
992-II GT3 Manthey KW with Lift
PAF.108.749

N 102.723.02

N 107.847.02

PAF.003.923

WHT.004.985
8x

2x

2x

12 x

2x
PAF.104.513
2x
PAF.912.572

PAF.908.088
6x

2x
⇒ Hexagon flange bolt, M8 x 42, for upper axle guide

⇒ Hexagon collar nut, M10, for connecting rod

⇒ Hexagon flange bolt, M12 x 1.5 x 85, for lower axle guide

⇒ Hexagon nut, M8, for upper strut bearing

⇒ Hexagon shoulder nut, M14 x 1.5, for front shock absorber piston

rod

⇒ Cheese head bolt with internal multiple-tooth head, M12 x 1.5 x

55

⇒ Hexagon flange bolt M8 x 22

⇒ Hexagon flange bolt, M12 x 1.5
Suspension alignment: Intermediate plates may be required for adjusting the camber values on the front

axle. Order the required intermediate plates accordingly:

9F1.401.443.H

Work

Procedure:
2x
⇒ Intermediate plate, 2.0 mm / 0.79 in
Information

•
Some of the repair illustrations show only one side of the vehicle or a similar component.
•
Naturally, some steps also have to be performed on the opposite side of the vehicle as well.
Tequipment
Feb 19, 2026

Page 1 of 12
4
911 (992)

4400
ENU
16/25
Installation and Conversion Instructions
WARNING

Preloaded or pressurised components

•
Risk of squashing or bruising
Þ

⇒
Do not reach into the danger area.
Þ

⇒
Relieve tension on components before starting work.
Þ

⇒
Secure components to prevent them from loosening suddenly.

1
Chassis assembly

Leave all four wheels removed as described in the Chassis section.

Information

Do not press the piston rod into an upside-down position (overhead damper) – this can lead to a

permanent gas lock in the workspace and thus to a malfunction of the damper.
1.

2.

3.

4.
Feb 19, 2026

Page 2 of 12
–

–

–

–
Front axle spring strut without lift

Front axle spring strut with lift

Rear-axle spring strut

PASM deactivation kit
Chassis overview
1.1
Remove all four wheels. ⇒ Workshop Manual '440519 Removing and installing wheel with

central bolt'
1.2
Removing front spring strut. ⇒ Workshop Manual '408519 Removing and installing front spring

strut'
1.3
Disassembling front spring strut
Tequipment
Installation and Conversion Instructions
16 / 25 ENU
4400
4
1.3.1
Disassembling spring strut. ⇒ Workshop Manual '408537 Disassembling and

assembling front spring strut'
1.3.2
Remove front axle lift.
1.3.3
Þ 5 -2- and lock nut ⇒

Þ 5 -3-.

Remove height-adjusting nut ⇒
1.3.4
Þ 5 -4- up until the dust boot detaches ⇒

Þ 5 -1- and remove

Screw the front axle lift ⇒

Þ 5 -1-.

dust boot ⇒
1.3.5
Þ 5 -4Remove front axle lift ⇒

Þ 5 -5- from

and lock nut ⇒

Þ 5 -6- (use

the spring strut ⇒

open-ended spanner 700 17 171

and open-ended spanner 700 17

184).

1

2

3

4

5

6
1.4
911 (992)
–

–

–

–

–

–
Dust boot

Height-adjusting nut

Lock nut

Front axle lift system

Lock nut

Spring strut
5
Assembling new front spring strut with front axle lift

1.4.1
Þ 6 -5- and lift system ⇒

Þ 6 -4- on the spring strut ⇒

Þ 6 -6-.

Mount lock nut ⇒

Do not tighten to the specified torque yet. Height adjustment dimension X = 103 mm

Þ Adjustment dimensions on spring strut -1-.

/ 4.06 in⇒
1.4.2
Þ 6 -13- on the shock absorber housing (use impact sleeve 700

Install plastic cap ⇒

17 169 and a plastic hammer).
1.4.3
Þ 6 -12-.

Screw-on the spring support ⇒

Then mount the bellows ⇒ 1.4.4.

.
Tequipment
Feb 19, 2026

Page 3 of 12
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911 (992)

4400
ENU
Installation and Conversion Instructions
16/25
1

2

3.1

3

3.2

4

5

6

7

8

9

10

11

12

13

1.4.4
6

Upper ring on bellows

Rubber stop

Spring plate, upper

Bellows

Mounting ring on bellows

Lift system (carried over from standard chassis)

Lock nut

Spring strut

Nut

Supporting mount - 65A.49.376 (LH)/65A.49.377 (RH)

Auxiliary spring

Intermediate ring

Coil spring

Lower spring plate (install with a distance of 10 mm / 0.39 in from the lift

system)

– Plastic cap
–

–

–

–

–

–

–

–

–

–

–

–

–

–
Mounting bellows:

Installing bellows mounting ring: Secure lift unit to prevent turning by fully screwing

Þ 6 -12- and securing with grub screw. Tightening torque 1

down lower spring plate ⇒

Nm (0.7 ftlb.)

Þ 6 -3.2- (use hook spanner 685 11 296), counTighten mounting ring for bellows ⇒

Þ 6 -12- (use hook spanner 685 11 295). Tightening

tering at lower spring plate ⇒

torque 15 Nm (11.1 ftlb.)
Þ 6 -3- to the mounting ring ⇒

Þ 6 -3.2-.

Install the short end of the bellows ⇒

Þ 6 -11-, spacer ring, ⇒

Þ 6 -10- and auxiliary spring ⇒

Þ 6 -9- onto

Push coil spring ⇒

Þ 6 -3.1- onto bellows ⇒

Þ 6 -3-.

the piston rod. Install upper spring support ⇒
Feb 19, 2026

Page 4 of 12
Tequipment
Installation and Conversion Instructions
911 (992)

16 / 25 ENU
4400
4
Þ 6 -2-, top bellows ring ⇒

Þ 6 -1- (Bellows is fixed between ⇒

Þ 6

Install rubber stop ⇒

Þ 6 -1-) and supporting mount ⇒

Þ 6 -8- on the piston rod and tighten nut

-3.1- and ⇒

Þ 6 -7- (use special tool KW 685 10 179).

⇒

Þ 6 -2- are installed correctly: Pointed end must point

Ensure that the rubber stops ⇒

Þ 6 -7- . Use Loctite to secure. Tightening torque: 40 Nm (30

upwards as shown ⇒

ftlb.)

Þ 6 -3- is clipped onto the plastic cap when the spring strut is

The bellows ⇒

completely installed

1.5
Assembling new front spring strut without front axle lift

Information

The new front spring strut without front axle lift comes pre-mounted. The assembly

instructions are provided for the sake of completeness.

1.5.1
Þ 7 -5-. Then push the plastic cap⇒

Þ 7 -15-, wheel

Screw-on the spring support ⇒

Þ 7 -14- stop rubber ⇒

Þ 7 -3- onto the piston rod using bellows ⇒

Þ 7

spacers and ⇒

Þ 7 -8-, intermediate ring⇒

Þ 7 -7-, auxiliary spring⇒

Þ 7 -6-,

-4-. Install coil spring⇒

Þ 7 -5- and support bearing ⇒

Þ 7 -2-. Tighten support bearing ⇒

Þ

spring support top ⇒

Þ 7 -1-. (Use special tool CW 685 10 179).

7 -2- with nut ⇒

Medium-strength Loctite is to be used. Tightening torque 40 Nm (29.5 ftlb.)
1

2

3

4

5

6
–

–

–

–

–

–
7

Nut

Supporting mount - 65A.49.376 (LH)/65A.49.377 (RH)

Rubber stop

Bellows

Spring plate, upper

Auxiliary spring
Tequipment
Feb 19, 2026

Page 5 of 12
4
911 (992)

4400
ENU
Installation and Conversion Instructions
16/25

7

8

9

13

14

15
1.6
Intermediate ring

Coil spring

Spring plate, lower

Spring strut

Wheel spacer

Plastic cap
Adjust the relevant dimension X.

On vehicles with a lift system, ensure that the lift system line is aligned with the center of the

damping force adjustment wheel (A).
1

2

3

1
2
Feb 19, 2026

Page 6 of 12
–

–

–

–

–

–
Adjustment dimensions on spring strut

– Front axle with front axle lift

– Front axle without front axle lift

– Rear axle

Front axle with front axle lift
Dimension A
Lower edge of spring seat to shoulder of lift

unit
16 mm / 0.63 in
Front axle with front axle lift
Dimension X
Lower edge of lift unit lock nut to shoulder

of shock absorber-valve foot
88 mm / 3.46 in
Front axle without front axle lift
Dimension X
Lower edge of spring seat to shoulder of

damper-valve foot
117 mm / 4.61 in
Tequipment
Installation and Conversion Instructions

3
911 (992)

16 / 25 ENU
4400
Rear axle
Dimension X
Lower edge of spring seat to shoulder of

damper-valve foot
74 mm / 2.91 in
4
1.7
Tighten spring plate grub screws.

Tightening torque 1 Nm (0.7 ftlb.)
1.8
Only for spring strut with lift system: Tighten lift system lock nut (use open-ended spanner 700

17 171 and open-ended spanner 700 17 184).

Tightening torque 66 Nm (48.7 ftlb.)
1.9
Install front spring strut. ⇒ Workshop Manual '408519 Removing and installing front spring

strut'

Ensure the lift system line is not twisted or under strain.

When installing the spring strut, slide the strut bearing plate in the body connection as far as

possible towards the outside of the vehicle.
1.

2.

1.10

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