Engine Coolant - Filling - MTU 20V4000M93 series Operating Instructions Manual

7.15.5 Engine coolant – Filling
Preconditions
☑ Engine is stopped and starting disabled.
☑ MTU Fluids and Lubricants Specifications (A001061/..) are available.
Special tools, Material, Spare parts
Designation / Use
Engine coolant
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.
NOTICE
Cold coolant in hot engine can cause thermal stress.
Possible formation of cracks in the engine!
• Fill / top up coolant only into cold engine.
Preparatory steps
1. Turn breather valve (1) of coolant expansion
tank counterclockwise to first stop and allow
pressure to escape.
2. Continue to turn breather valve (1) counter-
clockwise and remove.
3. Release the coolant line union on both turbo-
chargers (→ Page 224).
4. Release the coolant line union at the coolant
distributor (→ Page 224).
5. Close breather valve (1) on expansion tank.
MS150048/05E 2018-03 | Coolant Circuit, General, High-Temperature Circuit | 229
Part No. Qty.