Inspect cooling system for leaks

AR20.00-P-1010SX

Inspect cooling system for leaks

19.1.11



Removing

 Danger!

Risk of injury to skin and eyes caused by scalding from contact with hot coolant spray. Risk of poisoning caused by 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

1

Switch on ignition

2

Adjust heater to maximum heat output

3

Unscrew cap (1) slowly at expansion reservoir (2) and relieve overpressure

4

Check coolant level and antifreeze content coolant

 Correct if necessary.

 Mixture ratio for coolant

*BF20.00-P-1001-04A

5

Screw on test cap (3) at the expansion reservoir (2)

 Tester cap

*210589009100

6

Connect pressure pump (4) at test cap (3)

 Pressure pump

*124589242100

7

Apply test pressure to cooling system

 To prevent damage to cooling system, do not exceed stated test pressure.

*BE20.30-P-1005-01A



Checking

8

Perform visual inspection of coolant carrying components

 Check condition and coolant loss for all coolant carrying components and connections. The coolant carrying components should be checked for inner leaktightness if there is no external coolant loss. There is the possibility, for example, that coolant can find its way over a defective cylinder head gasket into the combustion chamber or over a defective water heat exchanger into the oil circuits.

 Check condition and seating of the Henn coupling; replace catch springs as required in order to avoid coolant loss.

AR09.41-P-1311-01AL



Install

9

Release overpressure over valve on pressure pump (4) and remove pressure pump (4)

 Pressure pump

*124589242100

10

Unscrew test cap (3) at the expansion reservoir (2)

 Tester cap

*210589009100

11

Switch off ignition

12

Check coolant level and antifreeze content coolant

 Mixture ratio for coolant

*BF20.00-P-1001-04A



Notes on coolant level

AH20.00-P-1142-01V

13

Screw cap (1) onto expansion reservoir (2)

Number

Designation

2-stage
cap

BE20.30-P-1005-01A

Test pressure for pressure-testing cooling system

bar gage

1.4

Number

Designation

ENGINE all

BF20.00-P-1001-04A

Mixture ratio for coolant

Antifreeze/water

up to -37°C

50/50

up to -45°C

55/45

Specifications for service products

Sheet

BB00.40-P-0310-01A

Sheet

BB00.40-P-0325-00A