Connection Diagram - Coolant Hoses, Vehicles Without Transmission Fluid Heater, Without 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
Coolant Shut-Off Valve
- Controlled by a vacuum from the Climatronic Refrigerant Shut-Off Valve -N422-
Bleed Hole
Heater Core for the Heater
Coolant Recirculation Pump -V50-
- Installed only on vehicles with a start/stop system
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 Coolant Temperature Sensor -G62-
Engine Oil Cooler