8.17.4 Engine coolant – Draining
Preconditions
☑
Engine is stopped and starting disabled.
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.
Preparatory steps
1.
Provide a suitable receptacle to catch the coolant.
2.
Switch off preheating unit.
Engine coolant draining
1.
Turn breather valve of coolant expansion tank
counterclockwise until the first stop and al-
low pressure to escape.
2.
Continue to turn breather valve counterclock-
wise and remove.
3.
Draw off separated corrosion inhibitor oil in
expansion tank through the filler neck.
4.
Open drain valves and/or drain plugs and
drain coolant at the following points:
• Drain plug (4)
• Crankcase (1)
• Intercooler (6)
• Exhaust-pipe elbow (5)
• Heating connection (3)
• Engine oil heat exchanger (2)
5.
Close all open drain points.
6.
Place breather valve on filler neck and close.
MW15409/04E 2015-08
| Task Description | 131
TIM-ID: 0000006747 - 003
Summary of Contents for 12V2000M91
Page 1: ...Operating Instructions Diesel Engine 12V2000M91 16V2000M91 MW15409 04E...
Page 23: ...MW15409 04E 2015 08 General Information 23 TIM ID 0000002178 006...
Page 24: ...Lube oil system covers 24 General Information MW15409 04E 2015 08 TIM ID 0000002178 006...
Page 25: ...MW15409 04E 2015 08 General Information 25 TIM ID 0000002178 006...
