Draining Coolant

NOTIFICATION 

Cooling circuit not filled correctly 

• Risk of damage to vehicle components 
  1. → After relieving the system pressure, do not start the engine or high-voltage system.
  2. → Fill and bleed the cooling system correctly before starting the engine or high-voltage system.

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. 

Information 

• Note special features in the corresponding article for vehicles with auxiliary heater. 

1. Slowly open cap on coolant reservoir

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.

   Coolant reservoir cap

2. Place drip pan under the radiator.
3. Remove lower cap -1-  on the radiator -3-  .

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.

   Lower cap on radiator

   1. 3.1  Lift up spring clamp -2-  in order to loosen the locking mechanism.
   2. 3.2  Pull lower cap -1-  off the radiator -3-  .
4. Drain coolant.