Vehicle cooling system Audi 80 B4

Engine cooling system
When the engine is running, the water pump constantly supplies coolant to the cooling jackets, which takes away the heat generated as a result of the...

Coolant — level check
Do not rely on the coolant level warning light on the instrument panel. We recommend regular visual checks of the coolant level in the expansion tank....

Coolant Density — Check
A hydrometer is required to check the antifreeze content in the coolant. Each type of antifreeze has its own specific gravity. For this reason, it is...

Cooling system — leak test
If the engine is hot and the cooling system is at operating pressure, the leak test is fairly easy. 1. Make sure that the coolant circulation hoses on the...

Radiator — removal and cleaning
Withdrawal The radiator of AUDI cars consists of two plastic tanks, light metal tubes and cooling fins. Plastic radiator tanks for vehicles with 4- and...

Coolant hoses — removal
When replacing hoses, purchase only original ones. Be sure to change the clamps as well. 1. Drain the coolant from the system. 2. Loosen hose clamps. On the...

Coolant — Drain
1. Allow the engine to cool down to avoid burns when draining. 2. Remove the cap from the expansion tank. 3. Remove the engine mudguard. 4. Place a container...

Expansion tank cap
The expansion tank cap is important for the coolant circulation system, maintaining the necessary pressure for the system through the valves installed on it....

Thermostat — removal, installation and inspection
The thermostat is a device that determines when coolant must pass through the radiator to cool. This means that the opening of a large coolant circuit depends...

Water pump — removal and installation
The circulation of the coolant in the system is provided by a water pump, the drive of which may be different for each engine model. The water pump on vehicles...

Radiator fan
Vehicles with petrol engines are equipped with one electric radiator fan. Turning on the fan through the relay located on the relay block under No. 2 is...

Radiator fan — troubleshooting
1. Check up the corresponding resistance in the block of additional relays which is under the instrument panel at the left. 2. Disconnect the thermoswitch plug...

Radiator blower fan — removal
The radiator fan is removed together with the back cover. 1. Four-cylinder petrol as well as diesel engines. Remove the mounting bolts on the top of the rear...

TD Diesel Electric Water Pump
When the engine is switched off, the circulation of the coolant stops, which can lead to overheating. An electric water pump helps to avoid this situation,...

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80(B4, 1991-1996)

80(B3, 1986-1991)

80(B3, 1986-1991, petrol)

80(B2, 1979-1986)