Cooling System: Service and Repair
Cooling system cleaned (after oil/coolant mixing)Tools
Cleaning the cooling system
ATTENTION Danger of poisoning!
^ Coolant additives and cleaning liquids are toxic.
^ Swallowing coolant additives and cleaning liquids must be urgently avoided.
^ Do not consume any food or drink while working (danger of accidental mixing).
^ If swallowed, observe the warning information on the containers and contact a doctor. If necessary, show the doctor the warning information on the packaging.
DANGER The vehicle fans can continue running or start up automatically.
^ Injuries which can lead to the loss of body parts.
^ The power supply to the fans must be disconnected before starting work on the radiator, radiator fans, or the belt drive.
^ '9784IN Disconnect fuse carrier' or battery
^ '9000IN Work instructions after disconnecting the battery'
ATTENTION Risk of damaging the cooling system!
^ Do not relieve the system pressure of the cooling system and then run the engine.
^ Relieving the system pressure and subsequently starting the engine can cause severe damage to components in the cooling system. If the cooling system must be opened when it is hot, allow the cooling system to cool down before starting the engine again.
Note:
^ The coolant filled in at the factory is intended to suffice for the entire service life. As long as the coolant is not contaminated by foreign bodies or other fluids it need not be changed.
^ Different coolant additives must not be mixed and doing so may damage the cooling system. Only use original Porsche coolant additives.
^ The coolant must be set to antifreeze protection of -37°C. This corresponds to a mixing ratio of 50 : 50 (coolant additive : water). This mixing ratio provides optimum corrosion and antifreeze protection.
^ Coolant additives, coolants and cleaning agents must be disposed of according to the respective, applicable national laws.
^ Seals in the cooling system must be replaced by new ones following disassembly.
1. Drain cooling system.
Note:
^ The cleaning work steps must be repeated until no more oil rises to the surface in the coolant reservoir.
^ The radiator cleaning agent mixture must be approx. 23 liters in the filling canister of the filling device filling device 9696.
^ The cleaning agent is mixed with water at a ratio of 50:50 (Frostox R Spezial).
2. Fill the cooling circuit with the cleaning agent mixture. To do this, proceed with the cooling system analogously to filling the coolant.
3. Start the vehicle.
4. After the vehicle has been bled and the coolant temperature is >80 °C, let the stationary vehicle run at medium engine speed for at least 15 minutes.
5. Switch off engine.
ATTENTION Danger of scalding with hot coolant!
^ Never open the cooling system when it is hot. Emerging coolant may be very hot and can cause scalding.
^ The cooling system must be depressurized before being opened.
^ Allow engine to cool down.
6. Open coolant reservoir carefully and slowly in an anti-clockwise direction with gloves and a cloth.
7. Drain cooling system.
8. Use hot water to rinse out any oil which has adhered inside the coolant reservoir.
9. Close the cooling system and fill the coolant circuit with water only and then bleed the cooling system according to regulations.
10. Start engine.
11. After the vehicle has been bled and the coolant temperature is > 80°C, let the stationary vehicle run at medium engine speed for at least 15 minutes.
12. Switch off engine.
ATTENTION Danger of scalding with hot coolant!
^ Never open the cooling system when it is hot. Emerging coolant may be very hot and can cause scalding.
^ The cooling system must be depressurized before being opened.
^ Allow engine to cool down.
13. Open coolant reservoir carefully in an anti-clockwise direction with gloves and a cloth and relieve any residual pressure.
14. Drain cooling system.
15. Close the cooling system and bleed with the approved antifreeze mixture according to regulations.