No. 183-21

Symptom-based workshop manual
Service
183/21 ENU
1035
1
Symptom - Rattling Noises from Around the Rear Axle: Checking Engine Mount
(SY 183/21)
Change overview:
Release
Date
Change
0
01/25/2022
•
First publication
1
11/28/2023
•
•
•
Order types added
Required parts changed
Test sequence revised
2
03/18/2024
•
•
Cause revised
Remedial Action revised
Model Line:
911 (992)
Model Year:
As of 2020 up to 2024
Equipment:
Dynamic engine mount (M-No. JQ3)
Concerns:
Rear engine mount
Symptom:
Customer complains about a rattling noise from the rear axle area while driving. It may only be possible to
notice the noise complaints in certain sections. For example, on uneven / wavy road sections.
Cause:
The cause may be the exhaustion of the maximum damping travel of the engine mounts, resulting in
contact with the decoupler plate of the engine mounts.This condition is characteristic of the engine
mounts, and does not indicate a defect in the parts.
Remedial
Action:
In the event of a complaint, the workshop must determine whether the noise is caused by defective
engine mounts, or if the noise is characteristic of the parts. Compare the noise using the sound file in the
enclosure and, if available, confirm the source of the noise using a targeted noise and vibration analysis
"PICO measurement".
Information
The reported noise does not necessarily indicate a defect in the engine mount. The installation of new
engine mounts can bring about a change in the reported noise. However, in most cases, replacement
does not result in any improvement.
Inform the customer about this and advise whether the customer wishes to replace the engine mounts
under these circumstances.
AfterSales
Mar 18, 2024
Page 1 of 12
1
Service
1035
Symptom-based workshop manual
ENU 183/21
Required parts and materials as needed
Information
No parts are required for checking engine mounts.
Parts Info:
Mar 18, 2024
Page 2 of 12
Part No.
Designation
– Location
Number
992199384F
 Hydraulic mount
2 pieces
PAF107838
 Hexagon flange bolt, M8 x 50
– Mounting for hydraulic mount on body
8 pieces
PAF104694
 Hexagon-head bolt, M12 x 1.5 x 70
– Engine carrier mounting
2 pieces
992199534A
 Cap
– Hydraulic mount
2 pieces
N 10742702
 Oval socket head bolt M8 x 25
– Screw for coolant line at connection point in engine
compartment
2 pieces
95557374901
 Round seal
– Coolant line
1 piece
95557374902
 Round seal
– Coolant line
1 piece
PAF909664
 Hexagon collar nut, self-locking
– Lower trailing arm on wheel bearing housing
2 pieces
PAF008674
 Hexagon flange bolt M12 x 1.5 x 105
– Lower trailing arm on wheel bearing housing
2 pieces
PAF008735
 Hexagon-head bolt, M12 x 1.5 x 95
– Rear axle carrier on rear axle carrier side section
2 pieces
PAF008673
 Hexagon-head bolt M12 x 1.5 x 110
– Rear axle carrier on rear axle carrier side section
2 pieces
PAF013814
 Sealing ring 14 x 18
– Coolant drain plug
2 pieces
AfterSales
Symptom-based workshop manual
Service
183/21 ENU
1035
992129260
 Hose clamp
– Intake pipe
2 pieces
PAF008955
 O-ring, 59 x 2.5
– Intake pipe
2 pieces
992145190A
 Sleeve
– Charge-air cooler on body
1 piece
N 91244501
 Hexagon-headl bolt (combination) combination screw,
M6 x 35
– Charge-air cooler on body
2 pieces
WHT008676
 Hexagon-head bolt, M12 x 1.5 x 45
– Strut on body
4 pieces
1
Additional parts required if chassis must be adjusted
9A700837900
Materials:
 Tie-wrap, A8.0 x 337
– Brake disc air guide
8 pieces
Required materials (usually already available in the Porsche Center)
Part No.
Designation
– Location
Quantity
00004330516
 Coolant additive, 20-liter/ 5. 28 gal container
– Cooling system
As required
Vehicles with refrigerant R1234yf
9A757390010
 Refrigerant compressor oil 1234yf
– Air-conditioning system
As required
....
 Refrigerant 1234yf
– Air-conditioning system
As required
Vehicles with refrigerant R134a
00004330579
 Refrigerant compressor oil R134a
– Air-conditioning system
As required
....
 Refrigerant R134a
– Air-conditioning system
As required
AfterSales
Mar 18, 2024
Page 3 of 12
1
Service
Symptom-based workshop manual
ENU 183/21
1035
Required tools
Tool:
•
•
•
VAS 611 015A - Vibration and noise analysis system
P90999 - PIWIS Tester 4
Battery charger with a current rating of at least 90 A, e.g. VAS 5908 - 90-A battery charger. For
further information about the battery chargers to be used, see the corresponding Workshop Manual.
 Workshop Manual '2X00IN Battery trickle charge'
Additional required tools if the engine mounts must be replaced:
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Torque wrench, 0.4-2 Nm (0.3-1.5 ftlb.), e.g. VAS 6253A - Torque wrench, 0.4-2 Nm
(0.3-1.5 ftlb.)
Torque wrench, 2-10 Nm (1.5-7.5 ftlb.), e.g. V.A.G 1783 - Torque wrench, 2-10 Nm
(1.5-7.5 ftlb.)
Torque wrench, 6-50 Nm (4.5-37 ftlb.), e.g. V.A.G 1331A - Torque spanner, 6-50 Nm (4.5-37
ftlb.)
Torque wrench, 40-200 Nm (30-148 ftlb.), e.g. V.A.G 1332A - Torque wrench, 40-200 Nm
(30-148 ftlb.)
Torque wrench, 150-800 Nm (111-592 ftlb.), e.g. V.A.G 1601 - Torque wrench, 150-800 Nm
(111-592 ftlb.)
9769 - Retainer plate
9769/1 - Support
9822 - Assembly tool
9959 - Lowering device
VAS 6832 - Master Gear unit elevating platform
VAS 6932 - Transport system
VAS 6867 - Support plate
9696 - Filling device
9696/1 - Cover
VAS 6096/2 - Vacuum pump
9794 - Assembly aid
9796 - Socket wrench
VAS 6266A - Wheel fitting trolley
9453 - Access ramps
V.A.G 1274B - Cooling system testing unit
VAS 6929 - Vacuum-cleaner nozzle
VAS 231 001 - High-performance fan
VAS 6890 - Spring band clamp pliers
Air conditioning service unit for R1234yf, e.g.VAS 581 001A - air conditioning service unit
R1234yf or air conditioning service unit for R134a, e.g.VAS 6746A - air conditioning service
station R134a
Additional required tools for measuring and adjusting the assist systems
•
•
Mar 18, 2024
Page 4 of 12
9229/1 - Puller hook
9730 - Socket-wrench insert
AfterSales
Service
Symptom-based workshop manual
183/21 ENU
1035
1
VAS 6826 - Steering wheel balance
VAS 6830 - Wheel-alignment adapter for wheels with central lock
VAS 6918 - Quick-clamping unit
VAS 6927 - Tie-wrap pliers
VAS 6430/1A - Adjustment device with reflector
VAS 6430/3 - Mirror for adjustment device
VAS 6350A - Calibration unit
VAS 6430/6 - Night View Assist calibration unit
VAS 6350/2A - Spacing laser
VAS 6430/4 - Lane Keep Assist calibration board
VAS 6350/7 - Locking Pins
VAS 6350/4 - Calibration unit for Lane Change Assist
•
•
•
•
•
•
•
•
•
•
•
•
Compare noise complaint
3D Information: Additional information is stored under the following link, which is required for carrying out the action
described here:
•
•
•
Sound file as an aid to identify the noise
Video as an aid to recreate the driving situation in which the noises occur
File required for this “PICO measurement”
Information
The updated 3D information for this action is currently not yet available. Please refer to the additional
information on PPN: https://ppn.porsche.com/portal/community/porsche_cars_north_america/after_
sales/support/blog/2023/11/17/sy-18321-additional-information
Work Procedure: 1
Recreate the noise complained about in a driving situation as described below and compare it with
the sound file from the 3D information:
•
•
•
•
Light acceleration
Normal drive mode
Transmission in “D”
Light load at approx. 1500 rpm
Assessment
( )
This is the same noise.
Action
To confirm the noise, perform a targeted noise and
vibration analysis “PICO measurement”.
Continue with:  Technical Information '2X00IN
Check engine mounts'
The measurement can only be omitted if no PICO
analysis tool is available. In this case, based
on empirical values and a comparison vehicle
with dynamic engine mount, estimate whether
AfterSales
Mar 18, 2024
Page 5 of 12
1
Service
ENU 183/21
1035
Symptom-based workshop manual
a component replacement would lead to an
improvement.
(✗)
It is not the same noise.
Identify other cause of noise.
End of test.
Checking engine mounts using targeted noise and vibration analysis “PICO measurement”
CAUTION
Hot components
•
Risk of burns

Let hot components cool down.

Wear personal protective gear.
Information
In order to clearly determine that the engine mounts cause the noises complained about, a targeted noise
and vibration analysis “PICO measurement” must be performed.
If no targeted noise and vibration analysis “PICO measurement” is possible, based on empirical values
and, if necessary, a comparison vehicle with dynamic engine mounts whether these are unusually strong
noises, estimate whether a component replacement can make an improvement.
Information
Information and documents on the handling and use of the VAS 611 015A - vibration and noise
analysis system can be found in PALMS under “My learning area” with the keyword “Pico NVH
Diagnostics”
Overview › 01 Global › 01 Topics › 03 Technical Training › 01 Components & Repair Groups › 13 Others
Work Procedure: 1
Remove rear wheels.
 Workshop Manual '440519 Removing and fitting wheel'
2
Remove rear wheel housing liners (rear section).
 Workshop Manual '53691903 Removing and installing rear wheel housing liner (rear section)'
3
Install / route microphone and vibration and noise analysis system sensors as follows:
3.1
Microphone channel A rear-seat backrest
•
•
•
Mar 18, 2024
Page 6 of 12
Sensor type: Microphone
Item: Passenger compartment
Fastening on the vehicle: Rear-seat backrest area directed backwards  Item
microphone in channel A
AfterSales
Symptom-based workshop manual
Service
183/21 ENU
1035
1
Item microphone in channel A
3.2
Sensor channel B seat rail for driver seat
•
•
•
Sensor type: Acceleration sensor
Item: Passenger compartment
Fastening on the vehicle: Seat rail for driver seat at left Item sensor channel B
Item sensor channel B
3.3
Sensor channel C for left PADM bearing
•
•
•
Sensor type: Acceleration sensor
Item: Engine compartment
Fastening on the vehicle: Screw on PADM bearing on the left on longitudinal member
 Item sensor channel C
AfterSales
Mar 18, 2024
Page 7 of 12
1
Service
ENU 183/21
1035
Symptom-based workshop manual
Item sensor channel C
3.4
Sensor channel D for right PADM bearing
•
•
•
Sensor type: Acceleration sensor
Item: Engine compartment
Fastening on the vehicle: Screw on PADM bearing on the right on longitudinal member
 Item sensor channel D
Item sensor channel D
4
Mar 18, 2024
Page 8 of 12
Route the test leads  Example of routing / fastening underbody -1- in such a way that they are not
damaged during the analytical run.
AfterSales
Symptom-based workshop manual
Service
183/21 ENU
1035
1
Example of routing / fastening underbody
Example of routing / fastening intake hose
AfterSales
Mar 18, 2024
Page 9 of 12
1
Service
ENU 183/21
1035
5
Install wheels at rear (wheel housing liners need not be installed for the analysis run).
 Workshop Manual '440519 Removing and fitting wheel'
6
For targeted noise and vibration analysis “PICO measurement”, proceed as follows:
6.1
Load the available comparison measurement file called “Vergleichsmessung.pddata” in 3D
information.
6.2
Start measurement based on Comparison measurement file “Vergleichsmessung.pddata”.
Required settings are pre-set.
6.3
Open the “Record and Analyse” tab.
6.4
Switch view from “Frequency” to “Time Domain”.
6.5
Set filter to 550 Hz–900 Hz if not already
done.  Frequency filter
6.6
Start recording and perform comparison run.
•
•
•
•
Mar 18, 2024
Page 10 of 12
Symptom-based workshop manual
Light acceleration
Normal drive mode
Transmission in “D”
Light load at approx. 1500 rpm
6.7
Set markers as soon as noise complaint is
noticeable.
6.8
Stop and save measurement if noise
complaint has been recorded.
6.9
Compare current measurement with sample measurement  Sample measurement with the
same scaling (400 mg and 2.5 seconds).
AfterSales
Frequency filter
Service
Symptom-based workshop manual
183/21 ENU
1035
1
Sample measurement
Assessment
( )
Action
The noise can be attributed to the engine
mounts.
Using empirical values and, if necessary, a
comparison vehicle with dynamic engine mounts,
estimate whether these are unusually strong
noises.
If the noise is rated as “normal”, replacing the
engine mounts would not make any improvement.
If the noise is rated as “not normal”, replacing the
engine mounts can make an improvement.
If necessary, continue with:  Technical Information '440519 Replacing engine mounts'
(✗)
The noise cannot be attributed to the
engine mounts.
The engine mounts are not the cause of the noise.
If necessary, contact Technical Support in order to
agree on how to proceed.
End of test.
Continue with: Step  7.
7
Remove vibration and noise analysis system.
8
Install rear wheel housing liners (rear section).
 Workshop Manual '53691903 Removing and installing rear wheel housing liner (rear section)'
AfterSales
Mar 18, 2024
Page 11 of 12
1
Service
Symptom-based workshop manual
ENU 183/21
1035
Replacing engine mounts
Work Procedure: 1
2
Remove vibration and noise analysis system.
Replace engine mounts.
 Workshop Manual '103519 Removing and installing engine mount'
Working position and PCSS encryption
Labor position:
I No.
APOS
Labor operation
10350210
Check engine mounts
10352020
Removing and installing engine mount
10352010
Removing and installing engine mount
PCSS encryption:
Location (FES5)
10350
Engine mount
Damage type (SA4)
2013
rattles, knocks
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.
© 2024 Porsche Cars North America, Inc.
Mar 18, 2024
Page 12 of 12
AfterSales