Remove/install coolant thermostat

AR20.10-D-2461TSV

Remove/install coolant thermostat

16.07.2019

Engine

642 in model 907

Modification notes

16.07.2019

Document reference added.

Operation step 6

1

Bracket

6

Hose

2

Hose

7

Screw

3

Bracket

8

Leak oil line

4

Vacuum line

9

Seal

5

Coolant thermostat

 Warning

Risk of injury to skin and eyes suffering scalding from contact with hot coolantspray. Risk of poisoning from swallowing coolant.

Do not open cooling system unless coolant temperature is below 90 °C. Open cap slowly and release the pressure. Do not pour coolant into beverage containers.
Wear protective gloves, protective clothing and safety glasses.

AS20.00-Z-0001-01A

Topical note

Notes on avoiding damage through contamination and foreign objects

AH00.00-P-5000-01A

 

Remove/install

1

Drain off coolant.

AR20.00-D-1142TSR

2

Remove air filter housing.

AR09.10-D-1150TSV

3

Remove vacuum line (4) from cover of left cylinder head cover.

4

Remove bracket (1).

 To do so, remove screws of bracket (1). Place bracket (1) outside of working area.

 Bolt, bracket to charge-air distributor

*BA09.41-N-1002-01O

5

Remove hose (2) from bracket (3).

6

Remove hose (6) from coolant thermostat (5).

AR20.20-S-3865-15S

7

Remove leak oil line (8) from coolant thermostat (5).

8

Remove coolant thermostat (5).

 To do this, remove bolts (7). Collect coolant which flows out.

 Installation: Check seal (9) for damage.
Clean sealing surfaces.

 Commercially available devices/tools
Collecting pan

Loctite 7200

*BR00.45-Z-1038-04A

 Bolt, coolant thermostat housing to charge air distributor

*BA20.10-N-1002-01TSV

Depending on the findings,



Replace coolant thermostat (5).

 The coolant thermostat (5) and the coolant thermostat housing form a unit and can only be replaced together.

9

Install in the reverse order.



Check

 Warning

Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running.

Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.

AS00.00-Z-0005-01A

10

Perform engine test run and while doing so, check leak tightness in area of coolant thermostat housing and check function of coolant thermostat (5).

 Charge air pipe, charge air cooling, mixer housing

Number

Designation

Engine 642

BA09.41-N-1002-01O

Bolt, bracket to charge-air distributor

Nm

9

 Coolant pump, coolant thermostat

Number

Designation

Engine 642 in model 907

BA20.10-N-1002-01TSV

Bolt, coolant thermostat housing to charge air distributor

Nm

9

Repair materials

Number

Designation

Order number

BR00.45-Z-1038-04A

Loctite 7200

Henkel AG & Co. KGaA
http://www.loctite.de