Man D 2876 LE 101 Operating Instructions Manual page 26

Fill / bleed the cooling system (only when engine has cooled down)
Fill the cooling system of the engine with a mixture of drinkable tap water and anti-freeze
agent on the ethylene glycole basis or anti-corrosion agent.
See Publication "Fuels, Lubricants and Coolants for MAN Diesel Engines".
Coolant must be poured in according to the vehicle manufacturer's filling specifi-
cations.
Do not put cold coolant into an engine which is warm from operation.
Ensure that the ratio of water to anti-freeze is correct.
D Slowly pour in coolant (max. 10 ltr./min)
D Run the engine briefly and then check coolant level once more
Danger:
If, in an exceptional case, the coolant level has to be checked in an engine that
has reached operating temperature, first carefully turn the cap with safety valve
to the first stop, let off pressure, then open carefully.
Maintenance and care
26