Draining and Filling Coolant (Includes Bleeding)
Draining and filling coolant (includes bleeding)
Special tools
Components of the radiator vacuum filling device
Draining coolant
Caution: Danger of scalding! Coolant can be extremely and pressurized. Wear suitable protective clothing. Carefully open the cap on the expansion tank.
1. Position the vehicle at the take-up points provided on a lifting platform.
2. Open the bonnet.
Note:
^ The coolant filled in at the factory is intended for lifetime cooling and therefore does not need to be changed. This coolant must not be mixed with other coolants.
^ Only original Porsche antifreeze should be used when changing or topping up the coolant.
3. Open maintenance cover.
Caution: Danger of scalding!
^ Coolant can be extremely hot and pressurized.
^ Only open the cooling system when it is cold.
^ Wear gloves.
4. Carefully open the cap on the coolant expansion tank. Unscrew the cap anti-clockwise.
5. Open cap on the expansion tank and remove.
6. Remove underbody cover.
7. Release the front spoiler on the underside.
8. Remove the sheetmetal brace under the radiator. To do this, loosen the 4 fastening screws.
9. Drain cooling system. Remove the drain plug from the radiator, drain the coolant into a container and dispose of it according to the applicable national laws if no longer required.
10. Fit a new drain plug on the radiator and tighten it.
11. Install the sheetmetal brace under the radiator. Tighten the 4 fastening screws to 23 Nm (17 ft. lbs.).
Filling cooling system (includes bleeding)
1. Screw the cap adapter for the coolant expansion tank (K 60) onto the expansion tank.
2. Connect the flexible extension (Fz 100) to the cap.
3. Connect the vacuum pressure gauge of the bleeder tool to the flexible extension. When doing so, ensure that both shutoff valves are closed (positioned at 90° to flow direction).
4. Connect the Venturi nozzle to the vacuum pressure gauge.
Note:
^ The coolant quantity provided must be approximately 2 liters more than the amount which has to be filled in.
^ An antifreeze content of -35°C corresponds to a mixture of 50:50 (antifreeze: water).
5. Place a canister with a sufficient amount of coolant and with an antifreeze content for -35°C behind the vehicle near to the expansion tank.
Note: The bleeding process is completed more quickly if the canister is positioned at roughly the same height as the coolant expansion tank.
6. Push the filler hose -(5)- of the vacuum pressure gauge onto the canister connection. Guide the return line -(6)- from the Venturi nozzle to a second container (bucket).
Note: A hissing sound after connecting the compressed air supply is completely normal.
7. Connect the compressed air supply.
8. Open both shutoff valves on the vacuum pressure gauge until the transparent filler hose has completely filled with coolant.
9. Close the left shut off valve (V1) on the vacuum pressure gauge and allow a vacuum to build up in the coolant circuit.
Note:
^ If no vacuum is generated (the pointer does not move to the green area), there is a leak in the cooling circuit.
^ Deformation of the rubber hoses of the cooling system is normal.
^ When the pressure gauge pointer is in the green area of the display scale, sufficient vacuum has been built up.
^ After both shutoff valves on the vacuum pressure gauge have been closed and the compressed air supply has been disconnected, the vacuum must not drop. If the vacuum drops within approximately 30 seconds, there is a leak in the coolant circuit.
10. When there is a sufficient vacuum in the cooling system (indicator is in the green area), close the right shutoff valve (V2) and then disconnect the compressed air supply.
11. Reopen the left shutoff valve (V1) on the vacuum pressure gauge. The cooling system is then filled.
12. When there is no trace of vacuum present or the coolant is no longer drawn from the canister, open the right shutoff valve (V2).
13. Then remove the complete filling tool (including the cap K 60).
14. If necessary, fill the coolant expansion tank with coolant to the maximum marking.
Note: The system can be checked for leaks if necessary.
15. Screw on the cap of the expansion tank.
16. Close the maintenance cover.
17. Reinstall the complete engine guard.
13. Conduct a test drive with the vehicle, check the fluid level in the expansion tank after the coolant circuit has cooled again and, if necessary, fill up to the max marking with coolant.
Bleeding vehicles with auxiliary heater
1. Fill and bleed the car as described in the previous chapter with the vacuum filling device.
2. Warm engine to operating temperature (90°C).
3. Operate engine for 10 minutes with changing rev counts. When doing this, operate the engine for 10 seconds in idle and then for 10 seconds at 4,000 1/min. During the idle phase, the 2/3 distribution valve of the auxiliary heater is to be opened with the Porsche System Tester so that trapped air bubbles can escape.
4. Let the car cool down.
5. Open maintenance cover.
Caution: Danger of scalding!
^ Coolant can be extremely hot and pressurized.
^ Only open the cooling system when it is cold.
^ Wear gloves.
6. Carefully open the cap on the coolant expansion tank. Unscrew the cap anti-clockwise.
7. Check coolant level and, If necessary, fill the coolant expansion tank with coolant to the maximum marking.
8. Screw on the cap of the expansion tank.
9. Close the maintenance cover.