Engine Cooling System Assembly

ENGINE COOLING SYSTEM





NOTE: Always replace all gaskets. All parts of cooling system can be removed and installed with engine installed.





CAUTION: Coolant/antifreeze must not be reused when replacing engine, cylinder head, cylinder head gasket, radiator and heater core.

Coolant Hose Layout





NOTE: On water-cooled engines 1983-1985 m.y. a coolant leak in the rear heat exchanger area may be due to poor hose fit at the metal T-piece which connects the feed hose to the main coolant hose. An improved, white plastic T-piece with slightly larger diameter is available to correct this condition:
- replace metal T-piece with white plastic version
- remove flow restrictor from inlet fitting of heater valve

Radiator Assembly, Thermo-switch





NOTE
The cooling systems of all Volkswagen vehicles are filled at the factory with a mixture of water and an antifreeze solution (G 11) with corrosion inhibitors. This coolant mixture should be used year-round.

Phosphate-free anti-freeze prevents frost and corrosion damage, the formation of chalk and in addition, it raises the boiling point of water. Due to the higher boiling point the coolant is an aid to operational efficiency, when the engine is operating under full load, particularly in tropical climates.

When replacing coolant/antifreeze solution in all Volkswagen models, all model years, use phosphate- free coolant/antifreeze ZVW237 102.