Operating instructions

Cooling System, LT Circuit   47

Charge-air coolant draining

1. Provide an appropriate container to drain the

coolant into.

2. Turn breather valve of filler neck on coolant

expansion tank counterclockwise to first stop

and allow pressure to escape.

3. Continue to turn breather valve counterclockwise

and remove.

4. Draw off precipitated corrosion inhibitor oil from

the expansion tank through filler neck.

5. Open drain cocks and drain plugs and drain

coolant at the following points:

 at the LT cooling pump

 at the coolant lines to and from the intercooler

6. Draining of residual coolant:

 at the intercooler

7. Close all drain valves and install drain plugs with

new sealing rings.

8. Set breather valve onto filler neck and close it.

6.16.3 Charge-air coolant change

Material

Designation / Use Part No. Qty.

Coolant

FLS

Drain charge-air coolant system ( Page 6  46).

Fill charge-air coolant system ( Page 6  45).