122-N7T9K-05

911 (996)
Technical Information
18/17
ENU
4075
4
Front Axle Coil Spring
Vehicle Type:
911 Carrera (996)/911 Targa (996)/911 Millennium (996)
911 Carrera 4 (996)/911 Carrera 4S (996)
Model Year:
As of 1998 up to 2005
Subject:
Replacing the coil spring on the front axle during repairs
Information:
Coil spring for the respective chassis no longer available.
Notes:
During repairs, the faulty coil spring will be replaced by a new coil spring of similar design. A spring plate
(compensation part) may also have to be used (see Part Info table).
The new coil spring has the same function as the coil spring installed in the vehicle.
A faulty coil spring must always be replaced on both sides of the axle.
Existing sets containing a coil spring that is no longer available will be interpreted into new sets.
Parts Info:
The table below shows how the old coil springs (sets) are interpreted into the new coil springs (sets) and
which spring plate (compensation part) may also have to be used:
911 Carrera (996)/911 Targa (996)/911 Millennium (996)
Coil spring
Currently
986.343.531.05
986.343.531.07
986.343.531.06
986.343.531.08
Spring plate (compensation part)
New
986.343.531.01
996.343.511.03 – 8 mm, color: red
986.343.531.02
996.343.511.03 – 8 mm, color: red
996.343.531.01
996.343.511.03 – 8 mm, color: red
996.343.531.04
996.343.511.03 – 8 mm, color: red
996.343.531.02
996.343.531.15
996.343.531.16
996.343.531.03
996.343.531.17
996.343.531.18
AfterSales
Apr 17, 2018
Page 1 of 6
4
911 (996)
4075
ENU
Technical Information
18/17
996.343.531.11
996.343.531.19
996.343.531.12
No spring plate (compensation part) required
996.343.531.12
996.343.511.03 – 8 mm, color: red
996.343.531.13
No spring plate (compensation part) required
996.343.531.13
996.343.511.03 – 8 mm, color: red
996.343.531.22
986.343.531.12
No spring plate (compensation part) required
986.343.531.16
986.343.531.12
996.343.511.03 – 8 mm, color: red
996.343.531.23
986.343.531.11
996.343.531.20
986.343.531.15
996.343.531.14
996.343.531.21
911 Carrera 4 (996)/911 Carrera 4S (996)
Coil spring
Currently
Spring plate (compensation part)
New
996.343.533.05
996.343.533.20
996.343.533.04
996.343.525.02 – 7.5 mm, color: brown
996.343.533.07
No spring plate (compensation part) required
996.343.533.07
996.343.525.02 – 7.5 mm, color: brown
996.343.533.14
996.343.525.02 – 7.5 mm, color: brown
996.343.533.17
No spring plate (compensation part) required
996.343.533.17
996.343.525.02 – 7.5 mm, color: brown
996.343.533.18
996.343.533.30
No spring plate (compensation part) required
996.343.533.19
996.343.533.31
No spring plate (compensation part) required
996.343.980.13
996.343.980.26
No spring plate (compensation part) required
996.343.533.21
996.343.533.32
996.343.533.06
996.343.533.22
996.343.533.23
996.343.533.15
996.343.533.24
996.343.533.25
996.343.533.33
996.343.533.16
996.343.533.26
996.343.533.27
Tools:
Apr 17, 2018
Page 2 of 6
VAS 6908 - Stationary Spring Compressor
AfterSales
911 (996)
Technical Information
Work Procedure: 1
18/17
ENU
4075
4
Preparatory work
1.1
Raise the vehicle and remove wheels on the front axle.
1.2
Remove front spring strut (  Workshop Manual '408519 Removing and installing front
spring strut')
WARNING
Preloaded or pressurized components
•
Risk of pinching or bruising

Do not reach into the danger area.

Relieve the tension on components before starting work.

Secure components to prevent them from loosening suddenly.
1.3
Disassemble front spring strut (  Workshop Manual '4000 Disassembling and assembling
front spring strut')
Information
2
•
When installing new parts, refer to the allocations described in the Porsche Electronic Parts
Catalog (PET).
•
A different spring plate (compensation part) than the one used before may have to be used.
Assembling spring strut
Exploded view of spring strut on front axle
1
2
3
4
5
6
–
–
–
–
–
–
7
8
9
10
11
12
–
–
–
–
–
–
Shock absorber
NEW coil spring
Protective bellows
Additional spring
Cone washer
Spring plate (compensation part, depending
on coil spring)
Support ring
Deep-groove ball bearing
Stop plate
Spring strut supporting mount
Stop plate
Lock nut M14 x 1.5
Figure 1
AfterSales
Apr 17, 2018
Page 3 of 6
4
911 (996)
4075
ENU
Technical Information
18/17
2.1
Assemble spring strut as follows (see also
 Figure 1):
1
2
3
4
5
–
–
–
–
–
Protective bellows
Additional spring
Cone washer
Stop plate
Shock absorber piston rod
2.1.1
Attach protective bellows to additional spring and fit on piston rod
( Figure 2 ).
2.1.2
Figure 2
Push cone washer and stop plate as
far as they will go onto the piston rod at the correct position ( Figure 2 ).
WARNING
Preloaded or pressurized components
•
Risk of pinching or bruising

Do not reach into the danger area.

Relieve the tension on components before starting work.

Secure components to prevent them from loosening suddenly.
2.1.3
Pre-tension new coil spring using
spring tensioner ( Figure 3 ).
1
2
2.1.4
– New coil spring
– Spring tensioner
Position new coil spring on the
shock absorber as shown in Figure
3 ( Figure 3 ). The end of the coil
spring is touching the stop on the
concave washer.
Figure 3
Apr 17, 2018
Page 4 of 6
AfterSales
911 (996)
Technical Information
2.1.5
18/17
ENU
4075
4
ONLY for the relevant coil spring
(see table):
Press spring plate (compensation
part  Figure 4 -1-) into the
support ring/deep-groove ball
bearing assembly ( Figure 4 -2-).
1
2
3
– Spring plate (compensation part)
– Support ring/deep-groove
ball bearing assembly
– Spring strut supporting
mount
Figure 4
2.1.6
Complete support ring/deep-groove ball bearing/spring plate (compensation part)
assembly with spring strut supporting mount.
2.1.7
Fit spring strut supporting mount
assembly on the piston rod. Make
sure that the end of the coil spring is
inside the spring plate (underside of
spring strut supporting mount).
1
2
2.1.8
– Spring strut/supporting
mount assembly
– End of coil spring
Position stop plate at the correct
position above the spring strut
supporting mount and fit new lock
nut (M14 x 1.5) on the thread of the
shock absorber piston rod.
Tightening torque 80 Nm
(59 ftlb.)
3
40 85 20 00:
Figure 5
Concluding work
3.1
Install front spring strut (  Workshop Manual '408519 Removing and installing front spring
strut')
3.2
Fit wheels on the front axle and lower the vehicle.
3.3
Check wheel alignment values on the front axle and make adjustments if necessary.
ONLY for 911 Carrera (996)/911 Targa (996)/911 Millennium (996):
AfterSales
Apr 17, 2018
Page 5 of 6
4
911 (996)
4075
ENU
Technical Information
18/17
—Front spring strut (2 ea.) removed and installed—
Includes:
Removing and installing wheels, loosening and securing lower
control arms,
loosening and securing connecting link on anti-roll bars, front
brake calipers and tie rods
Without:
Performing suspension alignment and adjusting the vehicle.
Separate LO no.!
40 85 20 00:
ONLY for 911 Carrera 4 (996)/911 Carrera 4S (996):
—Front spring strut (2 ea.) removed and installed—
Includes:
Removing and installing wheels, loosening and securing lower
control arms,
loosening and securing connecting link on anti-roll bars, front
brake calipers and tie rods
Without:
Performing suspension alignment and adjusting the vehicle.
Separate LO no.!
40 85 38 50:
—Front spring strut (2 ea.) disassembled and assembled—
Includes:
Removing and installing coil spring
44 85 03 00:
ONLY for 911 Carrera (996)/911 Targa (996)/911 Millennium (996):
Labor time: 270 TU
Labor time: 80 TU
—Front suspension alignment performed—
Includes:
Checking height, camber, toe, caster and toe difference angle
Without:
Adjusting vehicle at the front. Separate LO no.!
44 85 03 00:
Labor time: 220 TU
Labor time: 70 TU
ONLY for 911 Carrera 4 (996)/911 Carrera 4S (996):
—Front suspension alignment performed—
Includes:
Checking height, camber, toe, caster and toe difference angle
Without:
Adjusting vehicle at the front. Separate LO no.!
Labor time: 90 TU
Important Notice: Technical Bulletins issued by Porsche Cars North America, Inc. are intended only for use by professional automotive technicians who have attended Porsche service training
courses. They are written to inform those technicians of conditions that may occur on some Porsche vehicles, or to provide information that could assist in the proper servicing of a vehicle. Porsche special
tools may be necessary in order to perform certain operations identified in these bulletins. Use of tools and procedures other than those Porsche recommends in these bulletins may be detrimental to the
safe operation of your vehicle, and may endanger the people working on it. Properly trained Porsche technicians have the equipment, tools, safety instructions, and know-how to do the job properly and
safely. Part numbers listed in these bulletins are for reference only. The work procedures updated electronically in the Porsche PIWIS diagnostic and testing device take precedence and, in the event of a
discrepancy, the work procedures in the PIWIS Tester are the ones that must be followed.
© 2018 Porsche Cars North America, Inc.
Apr 17, 2018
Page 6 of 6
AfterSales