No. 167-23-3

Service
Technical Information
167/23 ENU
1950
1
Coolant Warning Light Lights Up: Supposed Coolant Loss on the Coolant Pump (167/23)
Vehicle Type:
Panamera (971) / Panamera 4 (971) / Panamera 4S (971) / Panamera 4 E-Hybrid (971) /
Panamera 4S E-Hybrid (971)
Model Year:
As of 2017
Equipment:
2.9-liter twin-turbo V6 engine (M-No. TV8)
3.0-liter V6 turbo engine (M-No. T9I)
Concerns:
Coolant pump
Cause:
Customers complain that the “Coolant too low” message or a loss of coolant on the vehicle. A
supposed coolant loss on the coolant pump is determined in the workshop.
In order to prevent repeated and unnecessary repairs, a potential leak must be precisely defined. It must
be ensured that the coolant level in the coolant reservoir has not dropped due to potentially insufficient
ventilation during production or a previous repair.
Information
The visual inspection can show that small traces of
coolant are detected at the weep hole of the coolant
pump.
Due to lubrication/cooling of the lip seal on the coolant
pump, up to 3 ml coolant per 100 operating hours
can escape. Coolant outlet to this extent can be
considered normal and does not constitute grounds for
complaint. Traces of coolant on coolant pump
Traces of coolant on coolant pump
Action:
Check cooling system for leaks and replace any affected components.
Required tools
Tool:
•
•
•
V.A.G 1274B - Cooling system testing unit
V.A.G 1274/8 - Adapter for cooling system tester
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.)
AfterSales
Dec 15, 2023
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Service
Technical Information
ENU 167/23
1950
Checking cooling system
Work Procedure: 1
Narrow down leaks in the cooling system and then proceed as described below.
1.1
Eliminate traces of coolant and thoroughly clean and dry any potential leaking.
1.2
Fill cooling system to MAX.
1.3
Carry out visual inspection of a possible leakage at idle speed and at a higher engine speed
up to approx. 2500 rpm.
1.4
Check cooling system for leaks according to Workshop Manual.
For procedure, see:  Workshop Manual '190101 Check cooling system'
1.5
Re-evaluate original leak.
Assessment
( )
Action
No further coolant leak can be detected
at the affected location.
Continue observing, a part replacement is not
required.
End of remedial action.
(✗)
New coolant leak can be detected at the
affected location.
Replace component causing damage.
Labor position and PCSS encryption
Labor position:
APOS
Labor operation
19010140
Check cooling system
I No.
PCSS encryption:
Location (FES5)
19500
Coolant pump
Damage type (SA4)
5000
leaks
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.
© 2023 Porsche Cars North America, Inc.
Dec 15, 2023
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