Drain/pour in coolant

AR20.00-P-1142CMG

Drain/pour in coolant

09.06.2016

Engine

156 in model 204, 212

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

Drain screw for radiator

2

Drain screw on crankcase on the left

3

Drain screw on crankcase on the right

 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

 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



Notes on coolant

AH20.00-N-2080-01A

Drain off

1

Detach ground line from battery

When draining coolant at the right crankcase drain screw (3).



Notes on battery

AH54.10-P-0001-01A

Engine 156 in model 204

AR54.10-P-0003CW

Engine 156 in model 212

AR54.10-P-0003EW

2

Unscrew cap of the coolant expansion reservoir

 Unscrew cap slowly and relieve overpressure.

Drain coolant at radiator

3

Raise vehicle

4

Slide drain hose onto fitting on radiator

 The fitting is located at the bottom left on the radiator.

5

Unfasten radiator drain screw (1) and drain coolant.


Only remove radiator drain screw (1) until coolant flows out.
The radiator drain screw (1) can be permanently damaged otherwise.

 Observe regulations for disposal of coolant.

 Catch coolant in a suitable container.

Drain coolant on crankcase

6

Unfasten crankcase drain screw on the left (3) and crankcase drain screw on the right (2)

 Only loosen left crankcase drain screw (2) and right crankcase drain screw (3) at crankcase until they can be turned by hand.

7

Push drain hose onto left crankcase drain screw (2) and right crankcase drain screw (3)

8

Further unfasten left crankcase drain screw (2) and right crankcase drain screw (3) and drain off coolant

 Observe regulations for disposal of coolant.

 Catch coolant in a suitable container.

Pour in

9

Tighten drain screw (1) at radiator and detach drain hose from fitting

After coolant has been drained at radiator

10

Detach drain hoses from left crankcase drain screw (2) and right crankcase drain screw (3)

After coolant has been drained at crankcase

11

Tighten crankcase drain screw on the left (3) and crankcase drain screw on the right (2)

 Drain screw for coolant

*BA03.20-P-1009-01J

12

Pour in coolant and ventilate engine cooling system



Anticorrosion/antifreeze agents (Sheet 325.0)

BB00.40-P-0325-00A



Coolant specifications

BB00.40-P-0310-01A

AR20.00-P-1142-04A

 Use clean coolant again.

 Coolant mixing ratio

*BF20.00-P-1001-04A

 NTKL Adaption

*285589012100

 Electric vacuum pump

*285589022100

 Test cap

*210589009100

 Cooler vacuum filling device

*285589002100

13

Connect ground line to battery

After draining coolant at the right crankcase drain screw (3).

Engine 156 in model 204

AR54.10-P-0003CW

Engine 156 in model 212

AR54.10-P-0003EW



Check

14

Check engine cooling system for leaktightness

AR20.00-P-1010CMG

 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

 Crankshaft bearing cap

Number

Designation

Engine 156

BA03.20-P-1009-01J

Drain screw for coolant

Nm

15

 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