7.17.3 Charge-air coolant – Draining
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.
Charge-air coolant – Draining
1.
Provide a suitable container to catch the
coolant.
2.
Turn valve cover on coolant expansion tank
counterclockwise up to the first stop and
allow pressure to escape.
3.
Continue to turn valve cover 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 engine coolant at the following
points:
• at the LT coolant pump (arrows)
• at the HT coolant pump (arrows)
6.
Remove plug (1) for HT circuit draining.
7.
Remove plug (2) for LT circuit draining.
8.
Drain off residual coolant.
9.
Install plugs (1, 2) with new sealing rings.
10.
Close all drain valves and screw in drain
plugs with new sealing rings.
11.
Place valve cover onto filler neck and
close.
140 | Task Description | MS15042/00E 2014-10
TIM-ID: 0000014864 - 003
