Operating instructions

6.12.4 Engine coolant – Draining
Preconditions
☑ Engine is stopped and starting disabled.
Special tools, Material, Spare parts
Designation / Use Part No. Qty.
Sealing rings
(→ 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.
Engine coolant – Draining
1. Provide an appropriate container to drain
the coolant into.
2. Switch off preheating unit, if fitted.
3. Turn breather valve of filler neck on coolant
expansion tank counterclockwise to first
stop and allow pressure to escape.
4. Continue to turn breather valve counter‐
clockwise and remove.
5. Draw off precipitated corrosion inhibitor oil
from the expansion tank through filler neck.
6. Open drain plug at drain point in coolant
line to engine coolant cooler and drain cool‐
ant.
7. Draining of residual coolant:
• At the preheating unit, if fitted.
8. Drain engine coolant:
• At the engine coolant pump elbow;
• At the crankcase, left and right sides;
• At the thermostat housing.
9. Close all drain valves and install drain plugs
with new sealing rings.
10. Set breather valve onto filler neck and close
it.
MS150095/01E 2012-08 | Task Description | 81
TIM-ID: 0000014583 - 001