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3.6L - Cooling System - Engine Code(s): Blv: Overview Volkswagen Passat B6

Cooling Fan 4 illustrations ~683 words
CAUTIONWhen doing any repair work, especially in the engine compartment, pay attention to the following due to clearance issues: Route all lines and wires in their original locations. Make sure the wires have enough clearance to all moving or hot components.
WARNINGHot steam may escape when opening the expansion tank. Wear protective goggles and protective clothing to prevent damage to eyes and scalding. Cover the cap with a cloth and open very carefully.

Note. When the engine is warm, the cooling system is under pressure. If necessary release pressure before beginning repair work. Hoses are secured with spring-type clips. In cases of repair only use spring-type clips. Hose clip pliers VAS 6340 or VAS 6362 are recommended for installing spring clamps. While installing, route coolant hoses free of tension and without them coming into contact with other components. The marks on the coolant pipes and hoses must align with each other. Always replace gaskets and seals.

Perform a leak test on the cooling system using the cooling system tester V.A.G 1274 and adapters V.A.G 1274/8 or V.A.G 1274/9.

COOLING SYSTEM OVERVIEW, BODY SIDE

Note. Coolant hose connection diagram. Refer to COOLANT HOSE CONNECTION DIAGRAM .

Scheme 27

Scheme 27: COOLING SYSTEM OVERVIEW, BODY SIDE
Scheme 27: COOLING SYSTEM OVERVIEW, BODY SIDE
  1. Upper Coolant Hose To the connecting piece on the cylinder head.
  2. O-ring Replace if damaged.
  3. Radiator Removing and installing, refer to «RADIATOR»(ref-460595-S20481083182012032900000) . After replacing, replace the entire amount of coolant.
  4. Gasket
  5. Cap Check using the cooling system tester V.A.G 1274 and adapter V.A.G 1274/9. The pressure release valve must open at a pressure of 1.4 to 1.6 bar.
  6. Connector
  7. Bolt 5 Nm
  8. Expansion Tank Perform a leak test on the tank using the cooling system tester V.A.G 1274 and the adapter V.A.G 1274/8.
  9. Bracket For the radiator
  10. Bolt 5 Nm
  11. Support
  12. Nut 10 Nm
  13. Fan Shroud Removing and installing, refer to «FAN SHROUD WITH FANS»(ref-460595-S21296902342012032900000) .
  14. Bolt 5 Nm
  15. Coolant Fan 2 -V177- Removing and installing, refer to «FAN SHROUD WITH FANS»(ref-460595-S21296902342012032900000) .
  16. Connector
  17. Coolant Fan -V7- With the coolant fan control module -J293-. Removing and installing, refer to «FAN SHROUD WITH FANS»(ref-460595-S21296902342012032900000) .
  18. Lower Coolant Hose To the connecting piece for the coolant thermostat housing.
  19. Retaining Clip
  20. Engine Coolant Temperature (ECT) Sensor on Radiator -G83
  21. O-ring Always replace

COOLING SYSTEM OVERVIEW, ENGINE SIDE

Note. Coolant hose connection diagram. Refer to COOLANT HOSE CONNECTION DIAGRAM .

Scheme 28

Scheme 28: COOLING SYSTEM OVERVIEW, ENGINE SIDE
Scheme 28: COOLING SYSTEM OVERVIEW, ENGINE SIDE
  1. To the Upper Expansion Tank Fitting
  2. Rear Coolant Pipe
  3. Nut 20 Nm
  4. From the Heater Core
  5. To the Heater Core
  6. Coolant Line
  7. Bolt 10 Nm
  8. From the Transmission Oil Cooler
  9. Coolant Pipe, Side, Top
  10. Bolt 10 Nm
  11. Engine Coolant Temperature (ECT) Sensor -G62- If necessary release the pressure in the cooling system before removing.
  12. O-ring Always replace
  13. Retaining Clip Check clip for secure seating.
  14. Bolt 10 Nm
  15. To the Radiator Upper Fitting
  16. From the Auxiliary Cooler
  17. To the Auxiliary Cooler
  18. From the Radiator Lower Fitting
  19. Non-Return Valve Note the installed position. Arrow on the check valve points in the direction of flow.
  20. Coolant Pipe, Side, Bottom
  21. Bolt 25 Nm
  22. To the Transmission Oil Cooler
  23. Recirculation Pump -V55- Attached to the accessory bracket, 8 Nm To remove, remove the accessory bracket. Refer to «ACCESSORY BRACKET»(ref-460601-S42704717382012032900000). Component location of the recirculation pump. (Scheme 29)
  24. Bolt 8 Nm
  25. Coolant Thermostat Starts to open at 80°C (176°F). Removing and installing, refer to «COOLANT THERMOSTAT»(ref-460595-S07963932252012032900000).
  26. Coolant Thermostat Housing
  27. Seal Always replace
  28. Bolt 8 Nm
  29. Pulley For the coolant pump. Removing and installing «COOLANT PUMP»(ref-460595-S25621084462012032900000).
  30. Bolt 20 Nm
  31. Coolant Pump Check for ease of movement. Removing and installing, refer to «COOLANT PUMP»(ref-460595-S25621084462012032900000).
  32. Gasket Always replace
  33. Connecting Piece
  34. Bolt 10 Nm
  35. From the Lower Expansion Tank Fitting

Recirculation Pump Location

Scheme 29

Scheme 29
Scheme 29

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

AUXILIARY COOLER OVERVIEW

Note. The auxiliary cooler is located behind the left wheel housing liner. Coolant hose connection diagram. Refer to COOLANT HOSE CONNECTION DIAGRAM .

Scheme 30

Scheme 30: AUXILIARY COOLER OVERVIEW
Scheme 30: AUXILIARY COOLER OVERVIEW
  1. Front Mounting Frame
  2. Auxiliary Cooler To remove, remove the lower left wheel housing liner. Refer to «Removal and Installation»(ref-460555-S10135467142012032900000) .
  3. Rear Mounting Frame
  4. Coolant Hose Ensure the hose is securely seated. Coolant hose connection diagram. Refer to «COOLANT HOSE CONNECTION DIAGRAM»(ref-460595-S14432509522012032900000) .
  5. Air Shroud Clipped onto the rear mounting frame.
  6. Bolt 5 Nm
  7. Rubber Insert
  8. Spacer Bushing
  9. Nut 20 Nm

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