MTU 12 V 4000 G73 Operating Instructions Manual page 149

7.16.3 Charge-air coolant – Draining
Preconditions
☑ Engine is stopped and starting disabled.
Special tools, Material, Spare parts
Designation / Use
Sealing ring
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.
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 counter-
clockwise 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 charge-air coolant pump
• At the thermostat housing
6. Draining of residual coolant:
• At the intercooler
7. Close all drain valves and install drain plugs
with new sealing rings.
8. Place breather valve on filler neck and
close.
(→ Spare Parts Catalog)
MS150029/02E 2013-03 | Task Description | 149
Part No. Qty.