Cooling System Components, Engine Side

Cooling system components, engine side

Engines: AEG, AVH and AZG (from model year 1999)

Note:
^ Coolant hose connection diagram, AEG engine
^ Coolant hose connection diagram for engines AVH and AZG
1. To top of expansion tank
2. O-ring
^ Replace if damaged
3. Connection heater heat exchanger
4. Connector
^ 4-pin
^ Wiring chamber 3 and wiring chamber 4 for Engine Coolant Temperature (ECT) sensor -G62
^ Gold plated contacts for ECT -G62

5. Engine Coolant Temperature (ECT) sensor
- G62
^ For engine control module
^ With Engine Coolant Temperature (ECT) Sensor -G2
^ Gold plated contacts for Engine Coolant Temperature (ECT) Sensor-G62
^ Release pressure in coolant system if necessary, before removing components
6. Retaining clip
^ Check seated securely
7. From heat exchanger
^ Coolant hose connection diagram, AEG engine
^ Coolant hose connection diagram for engines AVH and AZG
8. Coolant pipe
9. From ATE radiator (automatic transmission) or shape hose
10. 10 Nm
11. To bottom of expansion tank
12. O-ring
^ Always replace
13. Union
14. To top of radiator
15. From bottom of radiator
16. Oil cooler
17. 15 Nm
18. Coolant thermostat
^ Checking: Heat up thermostat in water
^ Starts to open at approximately 86°C
^ Opening stroke: min. 7 mm
19. Toothed belt
^ Mark direction of rotation before removing
^ Check for wear
^ Do not kink
20. Coolant pump
21. Rear toothed belt guard
22. 20 Nm
23. Throttle valve control module
^ Heated by coolant





Engines: BBW, BEV and BHP

Note: Coolant hose connection diagram for engines BBW, BEV and BHP

1. To top of expansion tank
^ Coolant hose connection diagram for engines BBW, BEV and BHP
2. O-ring
^ Replace if damaged
3. Quick release coupling
^ Connection heater heat exchanger
4. Connector
^ 4-pin
^ Wiring chamber 3 and wiring chamber 4 for Engine Coolant Temperature (ECT) sensor -G62
^ Gold plated contacts for ECT -G62
5. Engine Coolant Temperature (ECT) sensor -G62
^ For engine control module
^ With Engine Coolant Temperature (ECT) Sensor -G2
^ Gold plated contacts for Engine Coolant Temperature (ECT) Sensor-G62
^ Release pressure in coolant system if necessary, before removing components
6. Retaining clip
^ Check seated securely
7. Coolant pipe
8. From ATE radiator (automatic transmission) or shape hose
^ Coolant hose connection diagram for engines BBW, BEV and BHP -
9. 10 Nm
10. To bottom of expansion tank
^ Coolant hose connection diagram for engines BBW, BEV and BHP -
11. O-ring
^ Always replace
12. Union
13. To top of radiator
14. From bottom of radiator
15. Oil cooler
16. 15 Nm
17. Coolant thermostat
18. Toothed belt
^ Mark direction of rotation before removing
^ Check for wear
^ Do not kink
19. Coolant pump
20. Rear toothed belt guard
21. 20 Nm
22. Washer
^ Note part number
23. Throttle valve control module
^ Heated by coolant