Inspect cooling system for leaks

AR20.00-P-1010MRV

Inspect cooling system for leaks

24.04.2020

Engine

254.9 in model 213

1

Cap

2

Coolant expansion reservoir

3

Tester cap

4

Pressure pump

 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 coolant

AH20.00-N-2080-01A

Notes on coolant level

AH20.00-P-1142-01CW



Remove

1

Switch on ignition.

2

Adjust heater to maximum heat output.

3

Slowly open cap (1), release overpressure and then remove from coolant expansion reservoir (2).

4

Check coolant level and antifreeze content of coolant.

 Coolant mixing ratio

*BF20.00-P-1001-04A

5

Attach tester cap (3) to coolant expansion reservoir (2).

 Test cap

*210589009100

6

Connect pressure pump (4) at tester cap (3).

 Test cap

*210589009100

 Pressure pump

*124589242100



Check

7

Apply a test pressure to the engine cooling system for 2 minutes.


Do not exceed the specified test pressure.
Damage will occur otherwise to the engine cooling system.

 There should be no pressure loss within a period of 2 minutes.

Test pressure for pressure-testing the engine cooling system

*BE20.30-P-1005-01A

8

Perform visual check of coolant-carrying component parts and connecting points for condition and coolant loss.

Where pressure loss is detected.



Install

9

Drain off overpressure via valve at pressure pump (4).

 Pressure pump

*124589242100

10

Remove pressure pump (4) from tester cap (3).

 Pressure pump

*124589242100

 Test cap

*210589009100

11

Detach tester cap (3) from coolant expansion reservoir (2).

 Test cap

*210589009100

12

Switch off ignition.

13

Check coolant level and antifreeze content of coolant; correct if necessary.

 Coolant mixing ratio

*BF20.00-P-1001-04A

14

Attach cap (1) to coolant expansion reservoir (2).

Radiator or expansion reservoir cap

Number

Designation

2-stage latch cover

BE20.30-P-1005-01A

Test pressure for pressure-testing the engine cooling system

Overpressure

bar

1,4

 Coolant mixing ratio

Number

Designation

Engine all (4xWD, CAR, smart)

BF20.00-P-1001-04A

Coolant mixing ratio

Antifreeze/water

Up to -37°C

%

50/50

As of -38 °C

%

55/45

Overview and specifications sheet

BB00.40-P-0310-01A

References to sheet specification

BB00.40-P-0310ZZ