Remove/install exhaust gas recirculation cooling coolant thermostat

AR14.20-S-0010PD

Remove/install exhaust gas recirculation cooling coolant thermostat

27.11.2019

Model

470 with engine 699.304/305

1

Coolant thermostat

2

Electrical connector

3

Coolant hoses

 Danger

Risk of death caused by vehicle slipping or toppling off of the lifting platform.

Align vehicle between vehicle lift columns and position the four support plates at the vehicle lift support points specified by the vehicle manufacturer.

AS00.00-Z-0010-01A

 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

Information on preventing damage to electronic components due to electrostatic discharge

AH54.00-P-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-S-1142P

 Removal: Lower vehicle for filling first.

2

Remove rear bottom engine compartment lining.

Model 470 with engine 699.304/305
except code Y1J (Sump shield)

AR61.20-S-1105P

 Installation: Only install lower engine compartment paneling after leak test.

3

Release coolant hoses (3) and remove the coolant thermostat (1).


Check sealing rings of the coolant hoses (3) for re-usability.
Otherwise, leaks will occur on the coolant thermostat (1).

 Collect coolant which flows out.
Plug openings.

 Commercially available devices/tools
Collecting pan

If one or more sealing rings of the coolant hoses (3) cannot be reused,



replace affected sealing rings.

 Assembly tool

*000589936300

4

Disconnect electrical connection (2).

5

Remove coolant thermostat (1).

 To do this, remove coolant thermostat (1) from the bracket.

6

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

7

Check the coolant thermostat (1) for leak tightness with the engine running.

 Visual inspection only.