Range Rover P38
26
COOLING SYSTEM
NEW RANGE ROVER
4
DESCRIPTION AND OPERATION
INTERCOOLER
Description
The intercooler (1) is an aluminium heat exchanger,
with integral side tanks, comprising a single row
matrix incorporating fifteen internal cooling tubes. A
cross-over duct (2) directs air from the air cleaner,
through a link hose (3) to the turbocharger (4). Air is
directed under pressure from the turbocharger to the
intercooler via the pre-formed inlet pipe (5). The
cooled air is fed to the inlet manifold through the feed
hose (6), see 26M 7031.
Intercooler
1. Intercooler
2. Cross-over duct
3. Link hose
4. Turbocharger
5. Inlet pipe
6. Feed hose
Operation
The 2.5 litre diesel has a high power output and is
subject to high running temperatures. Compression in
the turbocharger heats the air considerably, so that it
expands. As a result the air charge mass per cylinder
is reduced, having a negative effect on power output.
The charge-air intercooler cools the air before it
reaches the cylinders, thus increasing its density. This
increases power output through increased mass of
oxygen in the combustion process as well as
maximising engine durability through maintaining
lower piston and head temperatures.