10
Engine - Mechanics
SSP217_010
A duocentric oil pump driven by the cranks-
haft via a chain replaces the previously used
external gear oil pump.
The duocentric oil pump extends deep into
the oil sump. The low suction height means
that the oil pressure can build up quickly,
especially with cold-starts.
The oil-pressure control valve is located in the
oil pump housing. The “diverted“ oil is led off
to the intake side of the oil pump. This helps
optimise the level of efficiency.
In the intake spindle shafts, there are 5 oil
bores per triple roller rocker. Three oil bores
each supply one hydraulic tappet. Two oil
bores supply the oil-spray bores integrated in
the roller rocker to lubricate the rollers. The
oil-spray bores are only opened when the
roller rockers are actuated. This results in a
reduction of the amount of oil required in the
cylinder head.
Oil-level sensor
Triple roller rocker
The roller rockers are described on
pages 20 and 21.
Engine lubrication
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