Coolant hose connection diagram
Note: Blue = large coolant circuit. Red = small coolant circuit. Brown = heating circuit. Orange = EGR cooling circuit.
Coolant hose connection diagram 1. Check valve: the arrow indicates the flow direction; 2. Coolant radiator: after replacement, change the coolant; 3. Coolant pump; 4. Cylinder head/cylinder block: after replacement, change the coolant; 5. Radiator of the exhaust gas recirculation system: after replacement, change the coolant; 6. Exhaust gas recirculation temperature sensor -G98-; 7. Coolant temperature sensor -G62-; 8. Coolant circulation pump -V50-: only for vehicles with start-stop system; 9. Coolant shut-off valve: vacuum pressure-controlled coolant shut-off valve for Climatronic -N422-; 10. Ventilation hole; 11. Heater heat exchanger: after replacement, change the coolant; 12. Radiator thermostat for exhaust gas recirculation system; 13. Check valve: the arrow indicates the flow direction; 14. Extended cover coolant reservoir; 15. Coolant expansion tank: check the cooling system for leaks; 16. Oil radiator: after replacement, change the coolant; 17. Exhaust gas recirculation radiator pump -V400-; 18. 4/2-way valve with thermostat
Vehicles with auxiliary heater 1. Check valve: the arrow indicates the flow direction; 2. Coolant radiator: after replacement, change the coolant; 3. Coolant pump; 4. Cylinder head/cylinder block: after replacement, change the coolant; 5. Radiator of the exhaust gas recirculation system: after replacement, change the coolant; 6. Temperature sensor for the waste recirculation system; 7. Coolant temperature sensor -G62-; 8. Autonomous heater; 9. Ventilation hole; 10. Heater heat exchanger: after replacement, change the coolant; 11. Heater coolant shut-off valve -N279-; 12. Radiator thermostat for exhaust gas recirculation system; 13. Check valve: the arrow indicates the flow direction; 14. Extended cover coolant reservoir; 15. Coolant expansion tank: check the cooling system for leaks; 16. Oil radiator: after replacement, change the coolant; 17. Exhaust gas recirculation radiator pump -V400-; 18. 4/2-way valve with thermostat
Coolant pump and 4/2-way valve 1. Coolant pump; 2/6. Bolt:15Nm; 3. Seal ring: replace; 4. Seal ring: replace; 5. 4/2 way valve: The thermostat is located inside the 4/2 way valve and cannot be replaced separately
Coolant pipes, coolant temperature sensor, coolant circulation pump 1. Check valve: the arrow indicates the flow direction; 2. Coolant radiator: after replacement, change the coolant; 3. Coolant pump; 4. Cylinder head/cylinder block: after replacement, change the coolant; 5. Radiator of the exhaust gas recirculation system: after replacement, change the coolant; 6. Temperature sensor for the waste recirculation system; 7. Coolant temperature sensor -G62-; 8. Autonomous heater; 9. Ventilation hole; 10. Heater heat exchanger: after replacement, change the coolant; 11. Heater coolant shut-off valve -N279-; 12. Radiator thermostat for exhaust gas recirculation system; 13. Check valve: the arrow indicates the flow direction; 1/6/12/18/19/20. Bolt: 9 Nm; 2. Left lower pipe of the cooling system; 3. Seal ring: replace; 4. Radiator thermostat for exhaust gas recirculation system; 5. Coolant pipe, rear right; 7/16. Nut: 9 Nm; 8. Mounting bracket; 9. Coolant temperature sensor -G62-; 10. Seal ring: replace; 11. Gasket: replace; 13. Connecting pipe for cooling system hoses; 14. Coolant temperature sensor at radiator outlet -G83-: 2 Nm; 15. Seal rings: various diameters; replace; 17. Coolant pipe. back; 21. Left upper cooling pipe
Exhaust gas recirculation radiator pump-V400-. 1. Nut: 9 Nm; 2. Retainer: exhaust gas recirculation radiator pump -V400-; 3. Spacer sleeve; 4. Bolt: 2.7 Nm; 5. Nozzle; 6. Exhaust gas recirculation radiator pump -V400-
Coolant circulation pump -V50- 1. Holder; 2. Mounting plate; 3. Coolant hoses; 4. Coolant circulation pump -V50-; 5. Bolt: 2.7 Nm; 6. Bolt
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