Lubrication system
The oil is circulated by a rotor oil
pump of the crescent-type and has a
maximum capacity of 70 litres per
minute at 6000 rpm and 80° C oil tem-
perature. The inner rotor of the pump
is driven directly by splines on the
crankshaft. The pump design permits
a compact installation, with the oil
pump at the front end of the cylinder
block.
The oil sump (figure 11) is man-
ufactured in high-pressure die-cast al-
uminium and is equipped with cast
baffle plates and a steel windage tray
to ensure a constant oil supply and to
minimize foaming when driving hard.
Cooling system
The water pump is designed to meet
high demands for reliability and com-
pactness. The housing is integrated in
the engine block and the pump is
driven by the crankshaft via the cam-
shaft belt. It has a capacity of appr
160 litres per minute at 6000 rpm.
Shaft sealing is based on a ceramic
ring and a sintered carbon ring to
eliminate leakage.
The cooling fan is electrically pow-
ered with two speeds, regulated by the
engine's control or climate system.
Auxiliary drive and
installation Figure 12
Auxiliary units such as alternator,
power steering pump and air condi-
tioning compressor, are grouped to-
gether on the left side of the engine in
a very compact and rigid installation.
The left side was chosen in order to
protect the auxiliaries from the ex-
haust heat. The compactness makes it
possible to use the same installation
for both transverse and longitudinal
engine installations. Thanks to the ri-
gidity of the system, high strength and
low noise is achieved.
Drive is by a six-groove Poly V-
belt and tension is maintained at a
constant level by a friction damped
belt tensioner. The installation is very
cost-effective with one one tensioner
and one idler. The same components
are used for version with or without
AC-compressor. The only difference
is additional belt length.
Figure 11
