No. 06-09-7

Service
Technical Information
6/09
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Vehicle Analysis Log: Evaluating Overspeed Events (Panamera) (6/09)
Information
This Technical Information replaces the TI dated 07.10.2009.
Changes/additions compared to the previous Technical Information:
Information added under “Rev ranges” (driving downhill with PDK, rev range 3).
Vehicle Type:
Panamera S/Panamera Turbo
Model Year:
As of 2010
Concerns:
Evaluating overspeed events using the Vehicle Analysis Log (referred to below as “VAL”).
Situation:
Damaged unit parts due to high engine speed.
The information below is intended to help you to evaluate engine damage, which may occur as a result
of one or more overspeed events. Using the values entered in the VAL, you can also evaluate the
assignment of “Porsche Approved Warranties” better and check entitlement for processing repairs
under warranty and goodwill, for example.
Engines are designed to operate at a maximum permitted speed. This engine speed is not exceeded
when the vehicle is driven normally. However, driving and operating problems (e.g. “changing to
the wrong gear” on vehicles with manual transmission) or manipulation (e.g. tuning) can cause the
maximum permitted engine speed to be exceeded when the vehicle is driven.
Overspeed events are stored in the DME control unit. The following values are also recorded:
- Number of ignition attempts in each overspeed range 1 , and,
- Status of the hourmeter during the last overspeed event 2 .
1
Overspeed range = Defined rev ranges with classification of expected engine damage, e.g. engine
damage possible, ... probable, ... very probable, engine damage has generally occurred; see section
 'Rev ranges'.
2
For technical reasons, overspeed events are entered in a preset time interval. As a result, there may
be entries in a higher rev range (e.g. range 2), while no entries are stored in the lower range.
Typical faults and symptoms as a result of overspeed events may include the following:
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Damaged valves and/or pistons (impact marks on the valve, valve impressions on the piston, valve
bent).
Cylinder liner damage (even “piston seizure”).
Damaged or displaced connecting rod bearings.
Loosened or loose fastening screw(s) on the crankshaft pulley.
Loosened or loose fastening screw(s) on the camshaft gear.
Loosened or loose connecting rod bolts.
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Technical Information
6/09
Cracked timing chain(s).
Changed timing.
Irreparably damaged clutch elements (pressure plate and/or drive plate).
Vibrations and/or engine imbalance due to irreparably damaged clutch elements.
Vibrations around the transmission.
Defective synchronization.
Information
If such faults or symptoms are present together with engine damage, the VAL that was created must
be checked for overspeed entries.
If overspeed entries are found and if the difference between the current hourmeter and the status
when the last overspeed event was recorded is less than 50 operating hours, there is a high
probability that the damage was caused by overspeed event(s).
The value “50 operating hours” should be seen as a guide. The possibility of engine damage occurring
much later due to previous overspeed event(s) cannot be ruled out.
Rev ranges
970:
On vehicles with PDK transmission, the engine can start to over-rev when driving downhill with manual
gearshifts.
Create the VAL before deleting the fault memory. Overspeed events are documented as follows in
the VAL:
Rev range 1: 6,800 -1 ... to 6,900 -1
 Maximum permitted engine speed exceeded; no engine damage possible.
Rev range 2: 6,900 -1 ... to 7,000 -1
 Maximum permitted engine speed exceeded; no engine damage possible.
Rev range 3: 7,000 -1 ... to 7,200 -1
 Maximum permitted engine speed exceeded; engine damage possible, depending on number of
ignitions
Rev range 4: 7,200 -1 ... to 7,500 -1
 Maximum permitted engine speed clearly exceeded; engine damage probable.
Rev range 5: 7,500 -1 ... to 8,000 -1
 Maximum permitted engine speed very clearly exceeded; engine damage very probable.
Rev range 6: over 8,000 -1
 Engine damage has generally occurred.
Information
Before starting engine repairs or granting a pre-owned car warranty:
In the event of overspeed events in range 4 – 6, we recommend that you contact the Technical Hotline
before starting repairs or granting a pre-owned car warranty in order to find out how to proceed and verify
warranty coverage
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Service
Technical Information
References:
6/09
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0335
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→ “After Sales News 11/2007” or “Porsche Aktuell”: PIWIS Tester: Function for returning Vehicle
Analysis Logs (VALs)
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.
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