Cooling System Assembly Overview, Engine Side

Cooling System Assembly Overview, Engine Side

• Coolant hose connection diagram. Refer to => [ Coolant Hose Connection Diagram ] [1][2]Diagrams.

• Location of the non return valve => [ Coolant Hose Connection Diagram ] [1][2]Diagrams.





1 from Auxiliary Heater

• only on vehicles with optional equipment.

2 to Auxiliary Heater

• only on vehicles with optional equipment.

3 Bolt, 45 Nm

4 from Expansion Tank

5 Bolt, 10 Nm

6 To Expansion Tank

7 from Engine Coolant Switch Off Valve (Heater) ( N279)

• Only on vehicles with optional equipment.

8 Bolt, 10 Nm

9 to Engine Coolant Switch Off Valve (Heater) ( N279)

• Only on vehicles with optional equipment.

10 to Heat Exchanger

11 from Transmission Oil Cooler

12 to Transmission Oil Cooler

13 Bolt, 8 Nm

14 Coolant Thermostat Housing

• Coolant thermostat housing assembly overview. Refer to => [ Coolant Thermostat Housing Assembly Overview ] Service and Repair.

15 Bracket

16 O-ring

• Always replace.

17 Engine Coolant Temperature (ECT) Sensor (on Radiator) (G83)

18 Retaining Clip

• Check for secure seating.

19 from Radiator (Lower Fitting)

20 to Radiator (Upper Fitting)

21 O-ring

• Always replace.

22 Oil Filter Bracket

• With oil cooler.

23 Bolt, 23 Nm

24 Coolant Line

• To the coolant thermostat housing

25 After Run Coolant Pump (V51)

• Tightened to 8 Nm on the accessory bracket.

• To remove, remove the accessory bracket.

• Location of the after run coolant pump, refer to => [ Location of the After Run Coolant Pump ].

• After run coolant pump, checking. Refer to => [ Coolant After Run Pump, Checking ] Coolant After Run Pump, Checking.

26 Coolant Pump

• Check for ease of movement.

• Removing and installing, refer to => [ Coolant Pump ] Service and Repair.

27 Coolant Pump Pulley

• Removing and installing, refer to => [ Coolant Pump ] Service and Repair.

28 Bolt, 20 Nm

29 Bolt, 8 Nm

Location of the After Run Coolant Pump





The after run coolant pump is secured to the accessory bracket - arrow -.

- To remove, the accessory bracket must be removed from the cylinder block.

Tightening Sequence for the Accessory Bracket

- First tighten the alignment bolts - 2 and 4 - by hand.

- Then tighten bolts - 1, 3 and 5 - by hand.

- Then tighten all bolts uniformly and in a diagonal sequence.

Tightening specification: 23 Nm.