Scania 16 litre engine. Work Description — part 15
0105w15b.mkr
©
57
Fitting
Tightening torques
Description
1
Clean the sealing surfaces. Carefully
remove any remains of the old gasket.
2
Fit the flywheel housing with a new gasket.
The two appendages, A and B, are to be
removed and used for bolts A and B.
3
Fit the bolts. Torque tighten the M12 bolts
and studs to 92 Nm and the M10 bolts to
50 Nm.
Bolts for flywheel housing
Flange bolt and stud,
M12 : 92 Nm
Flange bolt, M10 : 50 Nm
Nut for turbocharger manifold
92 Nm
Bolts for oil sump
32 Nm
Plug for oil sump
80 Nm
112 295
M12
M10
M12
M12
M10
M10
A
B
A
B
M10
M12
Flywheel housing
58
©
0105w15b.mkr
4
Fit the oil sump with a new gasket. Torque
tighten the bolts to 32 Nm.
5
Fit the power take-off or the cover for the
power take-off.
6
Fit the turbocharger and the turbocharger
manifold, torque tighten the nut to 92 Nm.
7
Fit the exhaust manifold, intake manifold
and exhaust pipe from the turbocharger.
8
Fit the compressor.
9
Fit the starter motor and the cables to the
starter motor.
10 Fit the flywheel as described in Flywheel,
fitting.
11 Fit the engine speed sensors. Fit a new
O-ring onto the camshaft sensor.
12 Fit the oil pipe to the turbocharger.
Flywheel housing
0105w15b.mkr
©
59
Closed crankcase
ventilation
General
The prefilter and paper filter must be renewed as
described in the maintenance instructions.
The system is fitted with a fluid trap. There must
always be oil in the fluid trap. If the system has
been emptied, pour approximately 1 dl oil on the
bottom of the filter housing to fill the fluid trap.
Troubleshooting
Increased blow-by in engine
Blow-by is the flow of gases through the engine
crankcase and out via the crankcase ventilation.
The closed crankcase ventilation system is very
sensitive to changes to the blow-by in the
engine. If the blow-by increases, the amount of
gas passing through the crankcase ventilation
will also increase. The crankcase gases can then
take with it small drops of oil from the
crankcase. When the amount of oil increases,
the oil separator will not be able to fulfil its task
of separating the oil. Oil will then accompany
the air into the charge air system.
Causes of an increase in blow-by are leaking
piston rings, valve guides, turbocharger or
compressor.
Too much oil in the oil sump
If the engine is filled with too much oil, the
excess will splash around in the crankcase and
be atomized. This means that the crankcase
gases will contain a large amount of atomized
oil that the crankcase ventilation will not be able
to separate the oil properly. This will result in a
large increase of oil from the crankcase
ventilation.
115
229
Crankcase ventilation
60
©
0105w15b.mkr
Air leak in the crankcase
In a well-functioning closed crankcase
ventilation system, there should be a certain
amount of vacuum in the crankcase. If air enters
the crankcase from outside, the flow of gas from
the crankcase through the crankcase ventilation
will increase. This is the equivalent of increased
blow-by and will lead to an increase in oil.
An air leak in the crankcase can be caused by:
•
A defective diaphragm in the valve housing.
•
Poorly fitted oil filler cap.
•
Defective rubber plug on the oil dipstick
handle.
•
Worn brake compressor.
Damaged turbocharger
Oil can leak into the charge air system from a
damaged turbocharger.
Refer to Workshop Manual 01:03-02,
Turbocharger, for checking the turbocharger.
Crankcase ventilation
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст