Doosan DA40 - External coolant leakage; Oil pressed out via crankcase ventilation; Turbocharger breakdown

Engine
SHOP MANUAL
Ch 1 page 251
External coolant leakage
Oil pressed out via crankcase ventilation
Turbocharger breakdown
Eect Cause Trouble shooting Action
Leakage in cylinder liner
seal
Cold leakage
- Change to hoses of bet-
ter quality (preferably
silicone hoses)
Defective cylinder head
gasket
Water pump leakage
Check at the water pump
housing’s telltale hole
Leakage at charge air
cooler connection
Loss of coolant in
stationary installa-
tions with self-vent-
ing valves
Coolant pressed out of
expansion tank
Check that the self-vent-
ing valve is not situated
higher than the highest
coolant level and that air
is not drawn in through
the valve
- Change the valve or t
a manual air screw
Eect Cause Trouble shooting Action
Hole in piston crown Increases when white
smoke limiting device is
engaged or exhaust
brake applied
Bearing seizure in turbo-
charger
Oil seepage via pistons -
liner
Oil seepage in air com-
pressor
Eect Cause Trouble shooting Action
Loss of power
Excessive bearing play
in turbocharger
Lubrication piping
between turbocharger
and lter incorrectly
connected
- Check the connections