Jetta L4-2.0L (AEG) (2000)
Coolant: Service and Repair
Engine Cooling System:
The cooling system is sealed and generally requires little attention.
The cooling system has been filled at the factory with a permanent coolant which does not need to be changed. The coolant consists of a mixture of water
and the manufacturer's coolant additive G 12 A8D - antifreeze on a glycol base with anti-corrosion additives (40% for USA models; 50% for Canadian
models). This mixture assures the necessary frost protection and protects alloy components in the engine's cooling system from corrosion and scaling. It
also raises the boiling point of the coolant.
Do not reduce the concentration of the coolant in the summer by adding plain water. The proportion of coolant additive must be at least 40% but not
more than 60% to maintain antifreeze protection and cooling efficiency.
For year-round driving, antifreeze is added at the factory for temperatures down to:
-13°F (-25°C) USA
-31°F (-35°C) Canada.
Always heed all WARNINGS!
Never use any coolant additive other than VW G 12 A8D additive (check label) for your vehicle. This coolant additive is available at
VOLKSWAGEN dealers.
Other types of antifreeze can, above all, significantly reduce corrosion protection. The resulting corrosion can cause a loss of coolant and
therefore serious engine damage.
When adding coolant additive to your cooling system, please remember:
Under no circumstances may G 12 A8D be mixed with other coolant additives (for example G 11).
You can recognize G 12 A8D in the expansion tank by its red color. If the liquid in the expansion tank is brown, G 12 A8D has been mixed with
another coolant additive. In this case, your vehicle's coolant must be changed as soon as possible.
Note
Mixing coolant additives can result in serious malfunction or engine damage!
Checking the Engine Coolant Level:
The coolant expansion tank is located on the right side in the engine compartment.
WARNING! To reduce the risk of being burned, never open the hood if you see or hear steam or coolant escaping from the engine
compartment. Wait until no steam or coolant can be seen or heard before carefully opening the hood.
Always heed all WARNINGS.