122-K8M7U-05

Service
Technical Information
09/18
ENU
2673
2
Noise Symptom - Buzzing Noise From the Exhaust System During Deceleration: Reworking
exhaust system (SY 09/18)
Vehicle Type:
Cayenne S (9YA)
Model Year:
As of 2018
Subject:
Front exhaust pipes
Symptom:
Buzzing/vibrating noises in the exhaust system area at an engine speed of approx. 1,100 rpm during
deceleration.
Cause:
The exhaust system can expand in an unfavorable direction and become strained at operating
temperature.
Remedial
Action:
Loosen clamps on the exhaust system, bring the exhaust system to operating temperature and
re-position the clamps.
Work
Procedure:
CAUTION
Hot components
•
Risk of burns

Let hot components cool down.

Wear personal protective gear.
1
Remove side section of front underbody cover ( Screws for cover -3-), see  Workshop Manual
'519219 Removing and installing cover for front underbody'
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Screws for cover
2
Mark the position of the clamp on the exhaust pipes with a water-resistant pen on both sides (front
and rear) of the clamp ( Front exhaust pipes -inset-).
Front exhaust pipes
3
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Loosen front screws ( Clamps -1-) on the clamps ( Clamps -2-) slightly so that the front exhaust
pipes ( Clamps -3-) cannot be moved by hand.
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Technical Information
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Clamps
4
Loosen rear screws ( Clamps -4-) on the clamps ( Clamps -2-) as far as required until you can
move the front exhaust pipes ( Clamps -3-) with the clamps ( Clamps -2-) on the rear exhaust
pipes.
Clamps
5
Bring the exhaust system to operating temperature. To do this, test-drive the vehicle at increased
load and engine speed of between 4,000 and 5,000 rpm if necessary.
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Technical Information
09/18
CAUTION
Hot components
•
Risk of burns

Let hot components cool down.

Wear personal protective gear.
6
After the test drive, check the position of the clamps and correct them if necessary:
•
•
At the front, the clamp should be aligned with the indicated marking ( Front exhaust pipes
-item A-).
At the rear, the distance from the edge of the clamp to the marking must not be more than 5
mm.
Front exhaust pipes
7
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Tighten screws ( Clamps -1 and 4-) on the clamps ( Clamps -2-) to  Tightening torque 30 Nm
(22 ftlb.) .
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Technical Information
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Clamps
8
Install side section of front underbody cover ( Screws for cover -3-).  Workshop Manual
'519219 Removing and installing cover for front underbody'
Screws for cover
9
Test-drive the vehicle again and check whether the buzzing/vibrating noises that the customer
complained about can still be heard.
10 If the buzzing/vibrating noises still occur, replace the front exhaust pipes, see  Workshop Manual
'267319 Removing and installing catalytic converter (V6 biturbo)'
End of action required.
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Technical Information
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Location
Explanation
Type
Basic value
Exhaust clamp
(clamp)
Item 2
Tightening torque
30 Nm (22 ftlb.)
Invoicing:
Tolerance 1
Tolerance 2
Scope 1 – Reworking catalytic converters: The work involved is invoiced under the labor operation:
APOS
Labor operation
26735020
Reworking catalytic converters
I No.
Scope 2 – Replacing catalytic converters: The work involved is invoiced under the labor operation:
I No.
APOS
Labor operation
51921903
Removing and installing front covers
26731971
Removing and installing catalytic converters
26731972
Removing and installing catalytic converters
For invoicing and documentation using PQIS, enter the following coding:
Location (FES5)
26170
Front exhaust pipe
Damage type (SA4)
1313
vibrating, shaking
References:
 Workshop Manual '267319 Removing and installing catalytic converter (V6 biturbo)'
 Workshop Manual '519219 Removing and installing cover for front underbody'
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
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