Cooling system components
WARNING: This page is about a different car, the 2006 Audi A4, 2005 Audi A4, 2004 Audi A4, 2003 Audi A4, and 2002 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.
Coolant hose connection diagram
1 - Radiator
- Removing and installing. Refer to Radiator, removing and installing
- After replacing, replace coolant
2 - Bleeder screw, 15 Nm
3 - Coolant thermostat
- Removing and installing. Refer to Coolant thermostat, removing, installing and checking
- Checking. Refer to Check coolant thermostat
4 - Cylinder head/Cylinder block
- After replacing, replace coolant
5 - Throttle valve control module -J338-
6 - Bleeder hole
- At coolant hose to heater core
7 - Heater core
- After replacing, replace coolant
8 - Expansion tank
- With cap
- Pressure relief valve in cap, checking. Refer to Pressure relief valve in cap, checking
9 - Oil cooler
10 - Coolant pump
- Removing and installing. Refer to Coolant pump, removing and installing
- Check for ease of movement