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Crankcase ventilation
The crankcase ventilation system is configured as a head ventila-
tion system. The extraction point for the blow-by gases* is located
in the cylinder block. The riser channels are protectively located in
the bearing saddle of main bearings two, three and four. The blow-
by gases are admitted directly into the rocker cover through the
cylinder head.
451_031
Note
The sectional view does not show the PCV combi valve and the second non-return valve.
Overview
Fine oil separator
Blow-by gas riser channels
Oil returnSingle-stage pressure-regulating valve
Non-return valve
The blow-by gases are pre-cleaned as they pass through the riser
channels.
A windage tray is integrated in the upper part of the oil pan as pro-
tection for the oil pan. The returning oil is admitted into the oil pan
below the oil level.
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