Maintenance and Care
MAN marine diesel engines D2868 LE4.. / D2862 LE4..
88
Carefully read through the Operating Instructions before starting any work!
This particularly applies to the General Safety Instructions section
and the safety instructions in the various chapters.
Filling/bleeding the cooling system
WARNING
Risk of damage due to excessive temperature difference
Engine damage when topping up with cold coolant if the engine is at operating temperature.
For this reason:
S Do not add cold coolant.
S Let the engine cool down.
NOTE
Engine damage due to lack of antifreeze and corrosion inhibitor
An incorrect mixture of antifreeze and corrosion inhibitor leads to failure of the cooling system.
Therefore:
S Prepare coolant as specified in the publication entitled "Fuels, lubricants and coolants for MAN indus
trial and marine diesel engines".
During filling, bleed the cooling system through the
bleed screws
1
at the liquid-cooled exhaust tur
bochargers and at the exhaust manifold
2
.
Engine installed inclined towards flywheel side
The bleed screws 1 and 2 are below the coolant
level in the expansion tank
4
.
1. Undo the bleed screws
1
and
2
.
2. Slowly add coolant at the filler neck of the ex
pansion tank
3
until coolant emerges from the
bleed screws without bubbles.
3. Screw in the bleed screws
1
and
2
one after
the other, then screw in the cap
3
as far as the
stop but do not tighten it.
Overtightened caps can not be opened again!
4. Leave the engine running at a speed of
1200 rpm for around 15 minutes.
5. Shut down the engine.
.
Continue with item 13, see page 96.
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