BMW S58 Owner's Handbook Manual page 24

S58￿Engine
4.￿Engine￿Mechanical
S58￿engine,￿cylinder￿head
The￿cylinder￿head￿of￿the￿S58￿engine￿has￿been￿redesigned￿with￿regard￿to￿coolant￿duct￿routing.
Thus,￿the￿S58￿engine￿does￿not￿feature￿the￿split-cooling￿concept￿used￿on￿the￿B58TU￿engine.
In￿addition,￿the￿mountings￿for￿the￿two￿high-pressure￿pumps￿on￿the￿cylinder￿head￿have￿been￿adapted.
4.1.5.￿Cylinder￿head￿cover
Design
The￿cylinder￿head￿cover￿is￿a￿new￿part￿on￿the￿S58￿engine.￿As￿distinct￿from￿the￿cylinder￿head￿cover￿of
the￿B58TU￿engine,￿the￿mounts￿for￿the￿two￿high￿pressure￿pumps￿are￿machined￿into￿the￿cylinder￿head
cover￿of￿the￿S58￿engine.
All￿the￿components￿for￿crankcase￿ventilation￿and￿the￿blow-by￿ducts￿are￿also￿integrated￿in￿the￿cylinder
head￿cover.￿The￿integrated￿valves￿ensure￿that￿the￿blow-by￿gases￿are￿reliably￿fed￿into￿the￿intake￿air.
The￿S58￿engine￿is￿equipped￿with￿a￿positively￿controlled￿crankcase￿ventilation￿system.

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