Drive systems and chassis | Engine technology · 43
The V8 engines have an enhanced
coolant management system offering
effective temperature control throughout
the engine. While 20 % of coolant flows
longitudinally through the crankcase, the
remaining 80 % serves the cylinder heads
using the proven cross-flow principle
(from hot to cold).
On all Cayenne models, the piston heads
are cooled using oil-spray jets integrated
within the main lubrication system.
The entire cooling system is designed for
prolonged heavy-duty use, e.g. off-road
driving or heavy towing and carrying
applications.
Lubrication.
The V8 engines use dry-sump lubrication
to ensure a consistent supply of oil in
all load conditions, especially in off-road
terrain. The oil reservoir is located inside
the engine. This saves on space and
reduces weight.
Oil is circulated around the V8 engines
using a demand-driven pump. This has
been designed for the toughest driving
scenarios on and off road, including per-
formance driving and extreme gradients.
The V6 engines have a wet-sump lubrica-
tion system. Ensuring a reliable supply of
oil, whatever the driving conditions.
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