Remove/install coolant thermostat

AR20.10-D-2461TSC

Remove/install coolant thermostat

02.10.2018

Engine

274 in model 907

1

Coolant thermostat

6

Clip

2

Coolant hose

7

Coolant hose

3

Screw

8

Clip

4

Electrical connector

9

Coolant hose

5

Coolant hose

10

Bolts

 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

 Warning

Risk of injury. Skin or eye injuries may result when handling hot or glowing objects.

Wear protective gloves, protective clothing and safety glasses, if necessary.

AS00.00-Z-0002-01A

 Caution

Risk of injury caused by scraping or cutting body parts on sharp vehicle parts

Always wear protective gloves when working on or near sharp and non-deburred vehicle parts.
Deburr repair panels.

AS00.00-Z-0017-01A

Topical note

Notes on avoiding damage through contamination and foreign objects

AH00.00-P-5000-01A

Topical note

Information on preventing damage to electronic components due to electrostatic discharge

AH54.00-P-0001-01A

Topical note

Notes on coolant

AH20.00-N-2080-01A

 

Remove/install

1

Drain off coolant.

AR20.00-D-1142TSC

2

Remove charge-air distributor.

AR09.41-D-8683TSC

3

Remove clamp (8).

 Installation: Correctly position clamp (8).

 Hose clamp pliers

*454589003700

4

Remove coolant hose (9) from coolant thermostat (1).

5

Remove coolant hose (7) from coolant thermostat (1).

AR20.20-S-3865-15S

6

Release and disconnect electrical connector (4).

7

Remove coolant hose (5) from coolant thermostat (1).

AR20.20-S-3865-15S

8

Remove clamp (6).

 Installation: Correctly position clamp (6).

 Hose clamp pliers

*454589003700

9

Remove coolant hose (2) from coolant thermostat (1).

10

Unscrew bolts (10).

 Screw/bolt, coolant thermostat to cylinder head

*BA20.10-N-1005-01CA

11

Remove screw/bolts (3).

 Screw/bolt, coolant thermostat to crankcase

*BA20.10-N-1004-01CA

12

Remove coolant thermostat (1).

 Installation: Replace sealing ring.

13

Install in the reverse order.



Check

 Warning

Risk of burn injuries, suffocation and poisoning when working on the exhaust system and the components connected to it. Risk of suffocation and risk of poisoning caused by inhalation of gaseous and solid components of the exhaust. Risk of poisoning caused by skin contact with solid components of the exhaust.

Wear protective clothing and safety glasses. Use the extraction system. Move people out of the hazard area.

AS49.00-Z-0001-01A

 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

14

Perform engine test run and check engine cooling system in area of coolant thermostat (1) in terms of leak tightness.

 Coolant pump, coolant thermostat

Number

Designation

Engine 274 in model 907

BA20.10-N-1004-01CA

Screw/bolt, coolant thermostat to crankcase

Nm

9

 Coolant pump, coolant thermostat

Number

Designation

Engine 274 in model 907

BA20.10-N-1005-01CA

Screw/bolt, coolant thermostat to cylinder head

Nm

9