Cooling system components

WARNING: This page is about a different variant/trim than selected.

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

Route lines of all types (e.g. for fuel, hydraulic, EVAP canister system, coolant and refrigerant, brake fluid, vacuum) and electrical wiring so that the original path is followed.
Ensure sufficient clearance to all moving or hot components.

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

NOTE:

When the engine is warm the cooling system is under pressure. If necessary release pressure before commencing repair work.
Hoses are secured with spring-type clips. In cases of repair only use spring-type clips.
Hose clamp pliers V.A.G 1921 or pliers for spring clamps VAS 5024 A are recommended for installing spring clamps.
When installing coolant hoses, make sure they are free of stress and do not come into contact with other components (observe markings on coolant connections and hoses).

Perform cooling system leakage test with Cooling System Tester V.A.G 1274 and Adapter V.A.G 1274/8 and Adapter V.A.G 1274/9.

Cooling system components, body side, refer to Cooling system components (on body), assembly overview

Cooling system components, engine side, refer to Cooling system components (on engine), assembly overview

Coolant hose connection diagram, refer to Coolant hose connection diagram

Coolant, draining and refilling, refer to Cooling system, draining and filling

Coolant mixture specifications, refer to Cooling system, draining and filling