Cooling System Components

Cooling system components

WARNING! The cooling system is pressurized when the engine is warm. When opening the expansion tank, wear gloves and other appropriate protection. Cover the cap with a rag and open carefully to relieve pressure slowly.

Note:
^ Hoses are secured with spring-type clamps. When repairing, only use the same type of spring-type clamps.
^ Use VAG 1921 clamp pliers when installing spring-type clamps.
^ Always replace O-rings at quick release connections if damaged or leaking.
^ When installing coolant hoses, make sure they are free of stress and do not come in contact with other components. Observe markings on coolant hoses and connections.

Note:
^ Always replace seals and gaskets
^ Draining and filling cooling system.
^ Checking cooling system for leaks, refer to Testing and Inspection.





1 Rear coolant line
2 From heater core
^ With bleeder valve
3 To heater core
^ With bleeder valve
4 Return hose
5 Filler cap for coolant expansion tank
6 Expansion tank
7 Filler hose
8 Thermostat
^ Replacing Refer to Thermostat, Engine Cooling.
^ Starts to open at approximately 87° C (188° F) Fully open at approximately 102° C (215° F)
^ Opening travel approximately 8 mm (0.3 inch)
9 Radiator
10 Bracket for coolant hoses
11 Coolant line
^ From cylinder block to oil cooler
12 Oil cooler
13 Coolant line
14 Coolant line to oil cooler