Inspect cooling system for leaks

AR20.00-I-1010B

Inspect cooling system for leaks

22.3.07

Checking

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

1

Unscrew side cap of the expansion reservoir (2)



Notes on coolant

AH20.00-N-2080-01A

2

Set heater switches to maximum heat output

3

Check coolant level, correct if necessary



Engine cooling system - check fluid level, adjust to correct level. Inspect anticorrosion/antifreeze protection, adjust to correct concentration

AP20.00-I-2010B

4

Fit adapter (3) and testing unit (4) onto expansion reservoir (2)



*001589832100



*655589006300

5

Fill cooling system via the test equipment (4) with compressed air

 The test pressure is about 1.0 bar.

6

Check the pressure in the cooling system after 5 to 10 minutes

 A pressure drop at the pressure gauge is visible for leaks in the cooling system: 

Check cooler, coolant lines, coolant pipes, coolant hoses, cap (1) and expansion reservoir (2); remove leaks if necessary.

If there is no leak present and there is still a pressure drop: 

Check engine in the area of the cylinder head gasket for coolant outlet; to this if necessary 

Remove/install cylinder head

AR01.30-I-5800B

7

Relieve the overpressure and remove adapter (3) and test equipment (4) on expansion reservoir (2)

8

Check coolant level, correct if necessary



Engine cooling system - check fluid level, adjust to correct level. Inspect anticorrosion/antifreeze protection, adjust to correct concentration

AP20.00-I-2010B