Cooling System: Description and Operation

Cooling System General Information

WARNING!
When the engine is hot, the cooling system is under pressure. If it is necessary to open the cooling system, do so slowly to relieve pressure gradually before starting repairs.

Note:
^ Hose connections are secured with spring-type or screw-type clamps.
^ Use clamp pliers, Hazet 798-5 or equivalent, to remove and install spring-type clamps.
^ During repairs, spring-type clamps may be replaced with screw-type clamps.

Draining and filling procedures and water/anti-freeze coolant mixture ratios - refer to Cooling System, Draining and Filling.

For leak tests of cooling system use VAG 1274 and 1274/3.