Cooling System Overview, Engine Side
WARNING: This page is about a different variant/trim than selected.
NOTE:
Coolant hose connection diagram. Refer to COOLANT HOSE CONNECTION DIAGRAM .
- To the Upper Expansion Tank Fitting
- Rear Coolant Pipe
- Nut
- 20 Nm
- From the Heater Core
- To the Heater Core
- Coolant Line
- Bolt
- 10 Nm
- From the Transmission Oil Cooler
- Coolant Pipe, Side, Top
- Bolt
- 10 Nm
- Engine Coolant Temperature (ECT) Sensor -G62-
- If necessary release the pressure in the cooling system before removing.
- O-ring
- Always replace
- Retaining Clip
- Check clip for secure seating.
- Bolt
- 10 Nm
- To the Radiator Upper Fitting
- From the Auxiliary Cooler
- To the Auxiliary Cooler
- From the Radiator Lower Fitting
- Non-Return Valve
- Note the installed position.
- Arrow on the check valve points in the direction of flow.
- Coolant Pipe, Side, Bottom
- Bolt
- 25 Nm
- To the Transmission Oil Cooler
- Recirculation Pump -V55-
- Attached to the accessory bracket, 8 Nm
- To remove, remove the accessory bracket. Refer to ACCESSORY BRACKET .
- Component location of the recirculation pump. Refer to Fig 2.
- Bolt
- 8 Nm
- Coolant Thermostat
- Starts to open at 80°C (176°F).
- Removing and installing, refer to COOLANT THERMOSTAT .
- Coolant Thermostat Housing
- Seal
- Always replace
- Bolt
- 8 Nm
- Pulley
- For the coolant pump.
- Removing and installing COOLANT PUMP .
- Bolt
- 20 Nm
- Coolant Pump
- Check for ease of movement.
- Removing and installing, refer to COOLANT PUMP .
- Gasket
- Always replace
- Connecting Piece
- Bolt
- 10 Nm
- From the Lower Expansion Tank Fitting
Recirculation Pump Location
The recirculation pump -arrow- is bolted to the accessory bracket.
-- Remove the accessory bracket from the cylinder block.
Accessory Bracket Bolt Tightening Sequence:
-- First, tighten the alignment bolts -2 and 4- by hand.
-- Then, tighten the bolts -1, 3 and 5- by hand.
-- Then, tighten all the bolts uniformly and in a diagonal sequence to specification: 23 Nm