Cooling system components, removing and installing
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.
WARNING:
Cover cap of expansion tank with rag and open carefully, as hot steam i.e. hot coolant may escape when opening.
NOTE:
- The cooling system is under pressure when engine is warm. If necessary reduce pressure before repair.
- Secure all hose connections using hose clamps appropriate for the model type:
- VAG1921 hose clip pliers are recommended for installing spring-type clamps.
- Always replace gaskets, seals and O-rings.
- The arrows which are marked on coolant lines and hoses must face each other.