Engine side components
General instructions: When the engine is warm, the cooling system is under excess pressure. To relieve excess pressure, first cover the expansion tank cap with a rag and carefully open it. When the engine is warm, the cooling system is under pressure. If necessary, release the pressure before performing repair work. It is recommended to use hose clamp pliers to install spring clamps "V.A.G 1921" or hose clamp pliers "VAS6340". The gaskets and sealing rings must be replaced. The arrows on the ends of the cooling system pipes and hoses must be opposite each other.
Hose connection diagram 1. Radiator, after replacement drain the old and fill with new coolant; 2. Oil radiator; 3. EGR radiator; 4. Radiator outlet coolant temperature sensor "G83"; 5. Coolant temperature sensor "G62"; 6. Bypass valve, not always provided, depending on the date of manufacture and model of the vehicle; 7. Coolant supply shut-off valve, not always provided, depending on the date of manufacture and model of the vehicle; 8. Ventilation hole; 9. Heat exchanger, after replacement drain the old and fill with new coolant; 10. Thermostat with hoses; 11. Check valve; 12. Expansion tank, with cap; 13. EGR radiator pump "V400"; 14. Coolant pump; 15. Thermostat; 16. Cylinder head/cylinder block, after replacement, drain the old and fill with new coolant