Drain/pour in coolant

AR20.00-P-1142FH

Drain/pour in coolant

09.06.2016

Engine

276 in model 204

Engine

276.9, 278 in model 207

Modification notes

12.02.2014

Work procedure altered and special tools for electrical vacuum pump and NTKL adaptation, added.

Operation steps 14 to 26

AR20.00-P-1142-04A

26.09.2014

Mischungsverhältnis Kühlmittel

BF20.00-P-1001-04A

1

Cap

2

Coolant expansion reservoir

3

Drain fitting

4

Drain screw for radiator

6

Drain hose

5

Coolant pump drain screw

6

Drain hose

 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

 Danger !

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



Notes on coolant

AH20.00-N-2080-01A

Drain off

1

Unscrew cap (1) on coolant expansion reservoir (2)

 Unscrew cap (1) slowly and relieve overpressure.

2

Remove lower engine compartment paneling

Engine 276 in model 204.0/2
Engine 276 in model 204.3
Engine 276.9, 278 in model 207

AR61.20-P-1105EW

Engine 276 in model 204.9

AR61.20-P-1105CY

Drain coolant at radiator

3

Slide drain hose (6) onto drain fitting (3)

4

Slacken drain screw on radiator (4) and drain coolant.


Remove radiator drain screw (4) until the coolant flows out.
Permanent damage to the radiator drain screw (4) will occur otherwise.

 Catch coolant in a suitable container.

 Observe regulations to dispose of coolant.

5

Turn ignition key for about 5 s in ignition lock into position 1 and then turn key into position 0

Engine 278 in model 207

 Repeat this procedure twice after a waiting time of about 30 s in order to empty the low-temperature water circuit.

Drain coolant from coolant pump

6

Loosen coolant pump drain screw (5)

Engine 276 in model 204
Engine 276.9 in model 207

 Drain screw on coolant pump

*BA20.10-P-1008-01AA

7

Push drain hose (6) onto coolant pump drain screw (5)

Engine 276 in model 204
Engine 276.9 in model 207

8

Continue to turn coolant pump drain screw (5) and drain off coolant

Engine 276 in model 204
Engine 276.9 in model 207

 Observe regulations to dispose of coolant.

 Catch coolant in a suitable container.

Pour in

9

Tighten down cooler drain screw (4) and detach drain hose (6) from drain fitting (3)

10

Tighten down coolant pump drain screw (5) and detach drain hose (6)

Engine 276 in model 204
Engine 276.9 in model 207

11

Pour in coolant and ventilate engine cooling system

AR20.00-P-1142-04A



Notes on coolant level

AH20.00-P-1142-01CW



Coolant specifications

BB00.40-P-0310-01A



Anticorrosion/antifreeze agents (Sheet 325.0)

BB00.40-P-0325-00A

 Re-use clean coolant.

 Coolant mixing ratio

*BF20.00-P-1001-04A

 Cooler vacuum filling device

*285589002100

 Test cap

*210589009100

 NTKL Adaption

*285589012100

 Electric vacuum pump

*285589022100

12

Turn ignition key for about 5 s in ignition lock into position 1 and then again turn key into position 0

Engine 278 in model 207

 Repeat this procedure twice after a waiting time of about 30 s in order to empty the low-temperature water circuit.



Check

13

Check engine cooling system for leaktightness

AR20.00-P-1010FH

14

Install lower engine compartment paneling

Engine 276 in model 204.9

AR61.20-P-1105CY

Engine 276 in model 204.0/2
Engine 276 in model 204.3
Engine 276.9, 278 in model 207

AR61.20-P-1105EW

 Danger !

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

15

Perform an engine test run and check engine cooling system for proper operation

 Coolant pump, coolant thermostat

Number

Designation

Engine 276

BA20.10-P-1008-01AA

Drain screw on coolant pump

Stage 1

Nm

6

Stage 2

°

90

 Coolant mixing ratio

Number

Designation

Engine all

BF20.00-P-1001-04A

Coolant mixing ratio

Antifreeze/water

Up to -37°C

%

50/50

As of -38 °C

%

55/45

Sheet

BB00.40-P-0310-01A

Sheet

BB00.40-P-0325-00A

Sheet

BB00.40-P-0326-00A