Scania DC11 - Page 84

84
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Scania CV AB 2011, Sweden
01:03-02
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 same as an increase in
blow-by and will lead to an increase in oil
carryover.
An air leak in the crankcase can be caused by:
• The oil filler cap is not properly secured.
• The rubber plug on the oil dipstick handle is
not located correctly.
Seal the oil dipstick connection as follows:
1 Pull the rubber seal, at the point shown by
the arrow, towards the dipstick handle.
2 Press the oil dipstick down into the engine
until it stops against the plastic pipe.
3 Press forward the rubber seal so that it
forms a seal with the plastic pipe.
111 675
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.
Closed crankcase ventilation
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