Connection Diagram - Coolant Hoses, Vehicles Without Transmission Fluid Heater, With Parking Heater

NOTE:

Blue = large coolant circuit.

Red = small coolant circuit.

Brown = heating circuit.

Fig 1: Coolant Hose Connection System Diagram

Courtesy of AUDI OF AMERICA, LLC

Radiator
Turbocharger
Cylinder Head/Cylinder Block
Parking Heater
Bleed Hole
Heater Coolant Shut-Off Valve -N279-
Heater Core for the Heater
Check Valve
- The arrow points in the flow direction
Coolant Pump
Restrictor
Coolant Expansion Tank Cap
- Checking the pressure relief valve. Refer to COOLING SYSTEM, CHECKING FOR LEAKS .
Coolant Expansion Tank
Check Valve
After-Run Coolant Pump -V51-
- Installed only on hot climate vehicles
Coolant Thermostat
Engine Oil Cooler
Engine Coolant Temperature Sensor -G62-