Cooling System Components

Cooling System Components


When doing any repair work, especially in the engine compartment, pay attention to the following due to clearance issues:

• Route lines of all types (for example, fuel, hydraulic, Evaporative Emission (EVAP), coolant, refrigerant, brake fluid and vacuum) and electrical wiring so that the original path is followed.

• Ensure sufficient clearance to all moving or hot components.


Hot steam may escape when opening expansion tank cap. Wear protective goggles and protective clothing to prevent damage to eyes and scalding. Cover the cap with a cloth and open very carefully.

• When the engine is warm the cooling system is under pressure. If necessary release pressure before beginning any repair work.

• Hoses are secured with spring-type clips. In cases of repair only use spring-type clips.

• Hose clip pliers (VAS 6340) or spring type clip pliers (VAS 5024A) are recommended for installing spring type clips.






• While installing, route coolant hoses free of tension and without them coming into contact with other components.

• The arrows on the coolant pipes and coolant hoses must line up across from each other.

• Always replace gaskets and seals.

Perform a leakage test on the cooling system using cooling system tester (V.A.G 1274) and adapters (V.A.G 1274/8) and (V.A.G 1274/9).