Connection Diagram - Coolant Hoses, With Parking Heater

• Blue = large coolant circuit.
• Red = small coolant circuit.
• Brown = heating circuit.
• Green = coolant circuit for the transmission.
• Arrows = coolant flow direction.

Fig 1: Connection Diagram - Coolant Hoses, With Parking/Auxiliary Heater

Courtesy of AUDI OF AMERICA, LLC

1. Radiator
2. Cylinder Block
3. Check Valve
4. Turbocharger
5. Check Valve
6. Exhaust Manifold
7. Cylinder Head
8. Engine Coolant Temperature Sensor -G62-
9. Restrictor
10. Parking Heater
    • With Recirculation Pump -V55-
11. Heater Coolant Shut-Off Valve -N279-
12. Heater Core for the Heater
13. Coolant Pump
14. Coolant Thermostat
    • For transmission coolant circuit
    • For version with dual clutch transmission
15. ATF Cooler
    • For version with dual clutch transmission
16. After-Run Coolant Pump -V51-
    • For version with dual clutch transmission
17. Check Valve
18. Restrictor
19. Cap
    • Check the pressure relief valve. Refer to COOLING SYSTEM, CHECKING FOR LEAKS .
20. Coolant Expansion Tank
21. Check Valve
22. Engine Coolant Temperature Sensor on Radiator Outlet -G83-
23. Engine Temperature Control Actuator -N493-
24. Engine Oil Cooler