Audi R8 Coupé Service and ca... Checking and ...  Cooling sys...
Fig. 163 Engine compartment: Markings on coolant expansion tank
Fig. 163 Engine compartment: Markings on coolant expansion tank
Checking coolant level
Park your vehicle on a level surface.
Switch off the ignition.
Wait for the engine to cool down.
Cover the cap on the expansion tank with a cloth, and carefully unscrew the cap anti-clockwise .
Read off the coolant level using the dipstick. When the engine is cold, the dipstick should be protruding approx. 1 cm beyond the edge of the coolant expansion tank.
Topping up coolant
Add coolant in the correct concentration link.
You should make sure that the fluid level remains stable. If necessary, add more coolant.
Screw the cap on again tightly.
Any loss of coolant normally indicates a leak in the cooling system. Drive to a qualified workshop without delay and have the cooling system checked. If there are no leaks in the system, a loss of coolant can only occur if the coolant boils and is forced out of the system as a result of overheating.
WARNING
  • The cooling system is under pressure. Do not unscrew the cap on the expansion tank when the engine is hot: you could be scalded by escaping steam.
  • The coolant and coolant additive can be a health hazard. Store the coolant additive in the original container in a safe place out of reach of children – risk of poisoning.
  • When working in the engine compartment be aware that the radiator fan may start running suddenly, even if the ignition is switched off – risk of injury!
CAUTION
Do not add coolant if the expansion tank is empty. Air could have got into the cooling system - risk of engine damage! In this case, do NOT drive on. Obtain professional assistance.

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