Cooling System

Coolant Hose Connection Diagram

Risk of scalding due to hot steam and hot coolant.

• The coolant system is under pressure when the engine is warm.

• Cover the coolant reservoir cap with a cloth and then open it slowly to release the pressure in the system.

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

• Secure all hose connections using hose clamps appropriate for the model type. Refer to the Electronic Parts Catalog (ETKA).

• Hose clip pliers (V.A.G 1921) or spring-type clip pliers (VAS 5024 A) are recommended for installing spring-type clamps.

• Always replace gaskets and seals.

• Arrows on coolant pipes and coolant hoses must line up across from each other.

Vehicles with 6-Speed Manual Transmission 02S






1 Radiator

• Change coolant after replacing

2 After-Run Coolant Pump (V51)

3 Coolant Pump

4 Coolant Thermostat

5 Engine Oil Cooler

6 Cylinder Head and Cylinder Block

7 Turbocharger

8 Coolant Reservoir

• With sealing cap

• Pressure relief valve in cap, checking, refer to => [ Cooling System, Checking for Leaks ] Testing and Inspection

9 Heat Exchanger for Heater Unit

10 Coolant Connection

Vehicles with S-Tronic Transmission 02E






1 Radiator

2 After-Run Coolant Pump (V51)

3 Coolant Pump

4 Coolant Thermostat

5 Engine Oil Cooler

6 Cylinder Head and Cylinder Block

7 Turbocharger

8 Coolant Reservoir

• With sealing cap

• Pressure relief valve in cap, checking, refer to => [ Cooling System, Checking for Leaks ] Testing and Inspection

9 Heat Exchanger for Heater Unit

10 Transmission Oil Cooler

11 Coolant Connection

12 Thermostat for the Transmission Oil Cooler