Cooling System Components, Front of Engine

Cooling System Components (on Engine, Front)








1 - Connection
- For thermostat

2 - O-ring
- Always replace

3 - Thermostat
- Checking: heat the thermostat in water
- Starts to open at about 86°C
- Opening travel: at least 7 mm

4 - Bolt
- Tightening torque: 10 Nm

5 - Filler cap
- Test with cooling system tester VAG 1274 and adapter VAG 1274/9
- Test pressure 1.4 ... 1.6 bar

6 - O-ring
- Replace if damaged

7 - Bolt
- Tightening torque: 10 Nm

8 - Expansion tank
- Carry out leak test of cooling system with cooling system tester VAG 1274 and adapter VAG 1274/8

9 - To rear water line

10 - Top coolant hose
- Secured to radiator with retaining clip
- Check for secure seating

11 - Coolant line

12 - Rear toothed belt guard

13 - Gasket
- Always replace

14 - Coolant pump
- Check that pump runs freely
- If damaged or leaking replace complete

15 - To front coolant line

16 - Bolt
- Tightening torque: 10 Nm

17 - Bolt
- Tightening torque: 25 Nm

18 - Lower coolant line

19 - Oil cooler

20 - Bolt
- Tightening torque: 25 Nm

21 - Bolt
- Tightening torque: 10 Nm

22 - Belt pulley
- For viscous fan

23 - Bolt
- Tightening torque: 10 Nm

24 - Fan wheel for viscous fan

25 - Viscous fan coupling
- Note left-hand thread
- Tightening torque only applicable when using open-end spanner 3312
- Tighten to 37 Nm

26 - Bolt
- Tightening torque: 25 Nm

27 - Bracket
- For viscous fan

28 - From bottom of radiator