Table of contents: Elements of the cooling system of a… ↓ Elements of the cooling system of a… ↓
7 is constantly pumped through the car (4-cylinder), 8 (5-cylinder) and 11 (6-cylinder) liters of coolant. This is done by means of a water pump, which is driven by a V-belt or toothed belt.
The path the coolant takes depends on its temperature.
When the engine is not yet warmed up, the coolant flows through a small circuit that passes through the engine and through the heat exchanger. Intake manifold and automatic starter (device enriching mixtures at start-up) additionally included in the small coolant circuit
At temperatures above 85-87°C, the thermostat opens the "large circuit", which includes the radiator. If the coolant temperature continues to rise and reaches 93°C, measured in the radiator itself, the radiator fan turns on and helps with cooling.
Elements of the cooling system of a 5-cylinder engine
Fan, radiator
1 radiator
2 Guide
3 Lower casing
4 Support
5 Guide
6 Upper support
7 Bracket (right)
8 Lock nut
9 Bushing
1Fan cover
11 Back wall
12 Overlay
13 Support
14 Back wall
15 Bearing
16 Val
17 Pulley
18 Viscous coupling
19 Fan wing
A version with an electric motor.
Pipelines, control elements
1 Water pump (main)
2 Pipeline
3 Cork
4 Connecting hose
5 Additional water pump
6 Expansion tank
7 Lid
8 Temperature sensor
Elements of the cooling system of a 6-cylinder engine
Fan, radiator
1 Radiator
2 Lower casing
3 Guide
4 Upper casing
5 Support
6 Guide
7 Support (upper)
8 Bracket
9 Lock nut
1Fan wing
11 Electric motor
12 Back wall
13 Electric fan unit
Pipelines, control elements
1 Lower radiator hose
2 Expansion tank
3 Upper radiator hose
4 Lid
5 Temperature sensor
(The original article is available on the online resource AudiManual)