Connection diagram for coolant hoses (without auxiliary heater)

WARNING: This page is about a different car, the 2006 Audi A8, 2005 Audi A8, and 2004 Audi A8. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Connection Diagram For Coolant Hoses (Without Auxiliary Heater)

Courtesy of VOLKSWAGEN UNITED STATES, INC.

1 - Radiator

Replace coolant after replacing

2 - Oil filter housing

With oil cooler
Removing and installing → Oil filter housing, removing and installing

3 - Generator

Liquid-cooled

4 - Bleeder screw

In hose to pump-valve unit

5 - Heater core in air conditioner, right

Removing and installing → 87 - AIR CONDITIONING
Renew coolant after replacing

6 - Pump valve unit

Removing and installing → 87 - AIR CONDITIONING

7 - Heater core in air conditioner, left

Removing and installing → 87 - AIR CONDITIONING
Replace coolant after replacing

8 - Bleeder screw

In hose from pump-valve unit

9 - Oil cooler for automatic transmission oil

10 - Expansion tank

With sealing cap
Pressure relief valve in cap, checking

11 - Cylinder head/cylinder block

Replace coolant after replacing

12 - Coolant pump

Removing and installing → Coolant pump, removing and installing

13 - Coolant thermostat

Removing and installing → Coolant thermostat, removing and installing, checking
Checking → Thermostat, checking