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Practical Tips, Emergency Service
217
Emergency Starting with Jumper
Cables If the battery is discharged, e.g. in winter or after
the car has been parked for a long time, the
battery of another car can be used for starting
with the help of jumper cables.
Make sure the voltage of both batteries is the
same. Both batteries must be 12 volt types.
The capacity (Ampere hours, Ah) of the booster
battery must not be substantially less than that of
the discharged battery.
The discharged battery must be correctly
connected to the vehicle’s electrical system.
fPlease see the chapter “BATTERY” on
Page 211.
fPlease see the chapter “EMERGENCY
UNLOCKING OF THE LUGGAGE COMPART-
MENT LID” on Page 210.
Note
fDo not try to start the car by pushing or
towing. Damage to the catalytic converters
and other components of the car may result.
Warning!
Risk of short circuit, damage and explosion,
resulting in serious personal injury or death.
fUse only jumper cables of adequate diameter
cross-section and fitted with completely
insulated alligator clips.
fFollow all warnings and instructions of the
jumper cable manufacturer.
fWhen connecting jumper cables, make sure
that they cannot get caught in any moving
parts in the engine compartment.
The jumper cables must be long enough so
that neither vehicles nor cables touch another.
fThe vehicles must not be in contact, otherwise
current might flow as soon as the positive
terminals are connected.
fThe cable clamps must not be allowed to
contact each other when one end of the
jumper cables are connected to a battery.
fEnsure that tools or conductive jewelery (rings,
chains, watch straps) do not come into contact
with the positive jumper cable or the positive
battery post.
fImproper hook-up of jumper cables can ruin
the alternator. Danger of caustic burns.
fDo not lean over the battery.
Danger of gas explosion.
fImproper use of booster battery to start a
vehicle may cause an explosion, resulting in
serious personal injury or death.
fKeep sources of ignition away from the
battery, e.g. open flame, burning cigarettes or
sparking due to cable contact or welding work.
fA discharged battery can freeze even at 23 °F/
–5 °C.
Before connecting jumper cables, a frozen
battery must be thawed out.
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218
Practical Tips, Emergency Service
Connect jumper cables in the following
sequence: Always observe the sequence below:
1. Connect the positive lead (red) to the
positive terminal of the discharged battery
first, then connect it to the positive terminal of
the donor battery.
2. First connect the negative cable (black) to
the negative terminal of the donor battery, then
connect it to a suitable grounding point on the
vehicle with the discharged battery.
This grounding point must lie as far as possible
from the battery.
For example, a solid metal part or the engine
block are suitable grounding points.
If no suitable grounding points are to be found
on either vehicle, the negative cable must
carefully be connected directly to the negative
terminal of the battery.
If a suitable grounding point is to be found only
on the donor vehicle, the negative cable must
first be connected to the terminal of the
discharged battery, then to the grounding point
of the donor vehicle.
3. Run the engine of the donor car at a higher
speed.4. Start the engine.
An attempted start using jumper cables should
not last more than 15 seconds. Then allow a
waiting period of at least one minute.
fNote
Before disconnecting the jumper cables,
electrical loads such as the heated rear
window and the heating fan blower should be
switched on (the vehicle’s lights must not be
switched on). This reduces voltage peaks
which may occur when disconnecting the
jumper cables.
With the engine running, remove both jumper
cables in reverse order.10_GT3_21.book Seite 218 Donnerstag, 4. Juni 2009 12:48 12
Page 234 of 251
Vehicle Identification, Technical Data
233 Vehicle Identification, Technical Data
Vehicle Identification................................... 234
Technical Data ........................................... 236
Engine Diagram at full Power ...................... 242
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234
Vehicle Identification, Technical Data
Vehicle IdentificationWhen ordering spare parts or making inquiries,
please always quote the vehicle identification
number. Vehicle data bankThe vehicle data bank is attached to the inside of
the “Maintenance” booklet.
It contains all important data about your vehicle.
Note
This data bank cannot be re-ordered if it is lost or
damaged.
This label contains the following information:
1. Vehicle Identification No.
2. Type/Type description
3. Engine code/Transmission code
4. Paint No./Interior
5. Optional equipment
Vehicle identification number In accordance with Federal Safety Regulations,
the vehicle identification number of your car is
located at the bottom left of the windshield frame
and can be seen from the outside.
The vehicle identification number is in the luggage
compartment under the battery cover and at the
bottom left behind the windshield.
Removing the battery cover
fPlease see the chapter “BATTERY” on
Page 211.
Safety compliance stickerThe safety compliance sticker is your assurance
that your new Porsche complies with all applicable
Federal Motor Vehicle Safety Standards which
were in effect at the time the vehicle was manuf-
actured.
The sticker also shows the month and year of
production and the vehicle identification number of
your car (perforations) as well as the Gross
Vehicle Weight Rating and the Gross Axle Weight
Rating.
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Page 236 of 251
Vehicle Identification, Technical Data
235
Tire pressure plateThe tire pressure plate is attached to the left-hand
door aperture.
Engine number The engine number is stamped on the underside
of the crankcase.
10_GT3_21.book Seite 235 Donnerstag, 4. Juni 2009 12:48 12
Page 237 of 251
236
Technical Data
Technical DataEngine data Ty p e M 9 7 / 7 7
Horizontally opposed engine,
liquid cooled
Number of cylinders 6
Bore 4.04 in./102.7 mm
Stroke 3.01 in./76.4 mm
Cubic capacity 231.6 cu. in./3797 cm
3
Net-horsepower 435 hp/320 kW
at crankshaft speed 7600 rpm
Net torque 317 ft. lb./430 Nm
at crankshaft speed 6250 rpm
Engine oil consumption up to 1.5 liters/1000 km
(1.6 quarts/622 miles)
Maximum permitted engine speed 8500 rpm
Engine control Stationary high-voltage distribution, sequential injection,
cylinder-selective knock-control, stereo oxygen sensor closed-loop control, diagnostic system,
4 overhead camshafts, Porsche VarioCam, hydraulic valve clearance compensation
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Page 240 of 251

Technical Data
239
CapacitiesUse only fluids and fuels authorized by Porsche. Your authorized Porsche dealer will gladly advise you.
Your Porsche has been designed so that it is not necessary to mix any additives with oils or fuels.
EngineOil change quantity without oil filter approx. 9.25 quarts / 8.75 liters
Oil change quantity with oil filter approx. 9.5 quarts / 9 liters
Please see the chapter “ENGINE OIL” on Page 159.
Coolantapprox. 7.9 U.S. gallons / 30 liters
Manual transmission
and differential
approx. 3.5 quarts / 3.3 liters transmission oil SAE 75W-90, Mobilube PTX
Fuel tank approx. 17.7 U.S. gallons / 67 liters
Fuel qualityYour engine is designed to provide optimum performance and fuel economy using
unleaded premium fuel with an octane rating of 98 RON (93 CLC or AKI).
Porsche therefore recommends the use of these fuels in your vehicle.
Porsche also recognizes that these fuels may not always be available. Be assured that your vehicle
will operate properly on unleaded premium fuels with octane numbers of at least 95 RON (90 CLC or AKI),
since the engine’s “Electronic Octane™ knock control” will adapt the ignition timing, if necessary.
Power steeringapprox. 1.35 quarts / 1.27 liter hydraulic fluid Pentosin CHF 11 S
® or Pentosin CHF 202
®
Brake fluid0.67 quarts / 0.63 liters; use only Original Porsche brake fluid.
Windshield washerapprox. 2.6 quarts / 2,5 liters without headlight washer
approx. 6.3 quarts / 6 liters with headlight washer
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242
Technical Data
Engine Diagram at full Power10_GT3_21.book Seite 242 Donnerstag, 4. Juni 2009 12:48 12