Coolant: Service and Repair
WM 193817 Draining and filling coolant (includes bleeding)
Tools
Preliminary work
Information
- Cooling systems with thermal management (controlled thermostats or coolant valves for controlling engine temperature) must be vacuum-filled.
- The thermostat must not be activated or electric current must not be applied to the thermostat since this can cause irreparable damage to the thermoelectric couple.
- Filling with a watering can only does not always guarantee a complete fill (trapped air - overheating).
- Clamps on cooling system components should be examined carefully following refilling (check the coolant level while cold and top up several times as required).
- Clamps on cooling system components must also be vacuum-filled if significant amounts of coolant are drained. Drain at least two litres of coolant for vacuum-filling because otherwise the correct vacuum cannot be built up.
1. Open the bonnet.
2. Remove engine guard. -> 108019 Removing and installing engine guard - section on "Removing" 108019 Removing and installing engine guard
Tools and materials
Special tools
Special tools
Filling device - overview and setup
Information
- Note special features in the corresponding chapter for vehicles with auxiliary heater.
Vacuum-filling device components Filling device 9696
Illustration of vacuum-filling device setup
Draining coolant
WARNING
Toxic substances
- Danger of poisoning or suffocation
-> Ventilate the work area well.
-> Never ingest or inhale.
-> Read specific information on the Hazard Sheet.
-> Wear personal protective gear.
WARNING
Hot fluid
- Danger of scalding
-> Let the fluid cool down.
-> Wear personal protective gear.
WARNING
Rotating components
- Danger of limbs being trapped or severed
-> Disconnect power supply to the drive motor of components or to the battery.
NOTICE
Cooling circuit not filled correctly
- Risk of damage to vehicle components
-> Do not switch on the engine after relieving the system pressure.
-> Fill the cooling system correctly and bleed it before starting the engine.
Information
- 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. Open the maintenance cover -1-.
2. Carefully open the cap on the coolant reservoir. Unscrew the cap in an anti-clockwise direction.
3. Remove cap.
4. Move service clip on bleeder valve assembly -3- into service position. The bleeder valve assembly is located next to the filler neck for the coolant reservoir -4-.
5. Drain the cooling system.
5.1. Drain the cooling system. Open the coolant hose -2- on the bottom right radiator (in direction of travel), drain coolant into a container and dispose of it according to the applicable national laws if no longer required.
6. Secure the coolant hose -2- on the radiator again.
7. Proceed as follows if the cooling system needs to be bled again (in order to clean the cooling system for example):
7.1. Disconnect coolant hoses -5- from the oil/water heat exchanger and collect emerging coolant.
7.2. Disconnect the coolant hose -6- for the coolant reservoir and collect emerging coolant in a suitable container.
1. If you have not already done so, screw cap adapter K65 for coolant reservoir onto the reservoir.
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° with respect to flow direction).
4. Connect the Venturi nozzle to the vacuum pressure gauge. => Connecting Venturi nozzle to vacuum pressure gauge
5. Place a canister with a sufficient amount of coolant and with an antifreeze content of -35 °C beside the vehicle close to the reservoir.
6. Push the filler hose -5- of the vacuum pressure gauge onto the canister connection. Route the return line -6- from the Venturi nozzle to a second container (bucket).
7. Connect the compressed air supply.
8. Open both shut-off valves on the vacuum pressure gauge => Shutoff valves on vacuum pressure gauge until the transparent filler hose has completely filled with coolant.
9. Close the left shutoff valve (V1) -arrow- on the vacuum pressure gauge and allow a vacuum to build up 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. Re-open the left shut-off 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). => Opening right shutoff valve
13. Then remove the complete filling tool (including the adapter K65).
14. If necessary, fill the coolant reservoir with coolant to the maximum marking.
15. Start the engine and leave it running at idle speed. Move the selector lever to position "P" and allow the engine to warm up.
16. Switch on passenger compartment heating. Blower setting: one bar.
17. Press the "Sport button". Activate "Sport" mode during ventilation.
18. Check the following while the vehicle is warming up.
18.1. Coolant temperature -2- and engine oil temperature -1- in the instrument cluster. Figure shows normal, acceptable values.
18.2. Feel the supply and return coolant hoses for the radiator and the peripheral engine cooling hoses to check that they are heating up uniformly.
18.3. It should be possible to force any suspected air bubbles through the cooling system by pressing the accelerator pedal from idle speed to approx. 3500 rpm -3- during the warm-up phase. Never supply power to the map-controlled thermostat using the workshop tester.
18.4. The cooling system has been filled and bled correctly if =>
- All coolant hoses are uniformly warm.
- The temperature display in the instrument clusters in the normal range.
- The passenger compartment heater is warm.
- The electric fan for engine cooling comes on.
19. Fit lid on the coolant reservoir.
20. Close the service clip on the bleeder valve assembly.
21. Close the maintenance cover.
Subsequent work
1. Install engine guard. -> 108019 Removing and installing engine guard - section on "Installing" 108019 Removing and installing engine guard
2. Conduct a test drive with the vehicle, check the fluid level in the reservoir after the cooling system has cooled again and, if necessary, fill up to the max marking on the coolant reservoir with coolant.
3. Check the cooling system if necessary.