8.16.3 Charge-air coolant – Drainage
Preconditions
☑ Engine is stopped and starting disabled.
Special tools, Material, Spare parts
Designation / Use Part No. Qty.
Sealing ring
(→ Spare Parts Catalog)
WARNING
Coolant is hot and under pressure.
Risk of injury and scalding!
• Let the engine cool down.
• Wear protective clothing, gloves, and goggles / safety mask.
Draining charge-air coolant
1. Provide a suitable receptacle to catch the
coolant.
2. Turn breather valve of coolant expansion tank
counterclockwise until the first stop and al-
low pressure to escape.
3. Continue to turn breather valve counterclock-
wise and remove.
4. Draw off separated corrosion inhibitor oil in
expansion tank through the filler neck.
5. Open drain valves and/or drain plugs and
drain coolant at the following points:
• at the LT coolant pump
• at the coolant lines to and from the
charge-air cooler
6. Draining of residual coolant:
• at charge-air cooler
7. Close all drain valves and screw in drain
screws with new sealing rings.
8. Place breather valve on filler neck and close.
128 | Low-Temperature Circuit | MS150049/04E 2017-04
TIM-ID: 0000007023 - 004
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