Engine – Cayenne V8
Page 1.19
The lower part of the crankcase is machined and paired together with
the upper part. To keep the weight as low as possible, the spheroidal
graphite iron inserts are no longer used and the wall thickness has been
reduced.
A low-pressure chill-casting procedure is used to make the upper and
lower part of the crankcase.
Crankshaft
The drop-forged crankshaft runs in five bearings and has eight counter-
weights. Main bearing 3 is designed as a thrust bearing. Axial play is
determined by two thrust washers, which are inserted into the bearing
halves. The main bearings are two-component bearings and have a
diameter of 64 mm. Since the lower part of the crankcase is made of
an all aluminum alloy, the main bearings are stronger than those used
previously and the retaining lugs have been changed to avoid confusion.
The main bearings are also “lead-free.”
4 knock sensors
Removed
thermostat
housing
V8-4.8
V8-4.5
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