Cooling System Overview, Engine Side
Cooling System Overview, Engine Side
• Coolant hose connection diagram. Refer to => [ Coolant Hose Connection Diagram ] [1][2]Cooling System.
• Location of non-return valve. Refer to => [ Coolant Hose Connection Diagram ] [1][2]Cooling System.
1 From Auxiliary Heater
• Not available on US vehicles.
2 To Auxiliary Heater
• Not available on US vehicles.
3 Bolt
• 45 Nm
4 From Lower Reservoir
5 Bolt
• 10 Nm
6 To Upper Reservoir
7 From Heater Coolant Shut-Off Valve (N279)
• Only on vehicles with optional equipment.
8 Bolt
• 10 Nm
9 To Heater Coolant Shut-Off Valve
• Only 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
• Overview, refer to => [ Coolant Thermostat Housing Overview ] Coolant Thermostat Housing Overview.
• Removing and installing, refer to => [ Coolant Thermostat Housing ] Coolant Thermostat Housing.
15 Bracket
16 O-ring
• Replace
17 Engine Coolant Temperature Sensor on Radiator (G83)
18 Retaining Clip
• Check clip for secure seating.
19 From Lower Radiator
20 To Upper Radiator
21 O-ring
• Replace
22 Oil Filter Bracket
• With oil cooler
23 Bolt
• 23 Nm
24 Coolant Pipe
• To coolant regulator housing
25 After-Run Coolant Pump (V51)
• Attached to the auxiliary bracket, 8 Nm
• To remove, the accessory bracket needs to be removed.
• Location, refer to => [ After-Run Coolant Pump Location ].
• Checking, refer to => [ After-Run Coolant Pump (V51), Checking ] Testing and Inspection.
26 Coolant Pump
• Check for ease of movement
• Removing and installing, refer to => [ Coolant Pump ] Service and Repair.
27 Belt Pulley
• For the coolant pump
• Removing and installing, refer to => [ Coolant Pump ] Service and Repair.
28 Bolt
• 20 Nm
29 Bolt
• 8 Nm
After-Run Coolant Pump Location
The after run coolant pump is secured to the accessory bracket - arrow -.
- Remove the accessory bracket from the cylinder block.
Accessory Bracket Bolt Tightening Sequence
- Tighten the bolts - 2 and 4 - by hand.
- Tighten bolts - 1, 3 and 5 - by hand.
- Tighten all bolts uniformly and in a diagonal sequence to 23 Nm.