Dodge ram truck 3500 1996 Service Manual page 1205

B R EXHAUST SYSTEM AND INTAKE MANIFOLD 11 - 3
Fig. 2 Exhaust System-
D E S C R I P T I O N AND O P E R A T I O N
TURBOCHARGER—5.9L DIESEL ENGINE
A turbocharger is used to force more air into the
engine cylinders. Exhaust gas energy is used to turn
the turbine wheel and shaft. At the other end of the
shaft is the compressor wheel. The compressor wheel
draws air i n and forces i t into the engine cylinders
through the intake manifold.
NOTE; Supplying increased air flow to the engine
provides:
• Improved engine performance
• Lower exhaust smoke density
• Improved operating economy
• Altitude compensation
9 Noise reduction.
INTERCOOLER—CHARGE AIR COOLER
Intake air is drawn through the air cleaner and
into the turbocharger compressor housing. Pressur­
ized air from the turbocharger then flows forward
through the charge air cooler (intercooler) located i n
front of the radiator. From the charge air cooler
(Intercooler) the air flows back into the intake man­
ifold.
The charge air cooler (Intercooler) is a heat
exchanger that uses air flow to dissipate heat from
the intake air. As the turbocharger increases air
pressure, the air temperature increases. Lowering
the intake air temperature increases engine effi­
ciency and power.
-Diesel Engines (Typical)
INTAKE MANIFOLD—V-6 and V-8 ENGINES
The aluminum intake manifold is a single plane
design with equal length runners. The manifold is
, sealed by flange side gaskets' with front and rear
cross-over gaskets.
INTAKE MANIFOLD—V-10 ENGINE
The aluminum intake manifold has two plenum
chambers an upper and lower which supply air to
five runners each. Passages across the longitudinal
center of the manifold feed air from the throttle body
to the plenum chambers.
ENGINE EXHAUST MANIFOLD—V-6 and V-8
ENGINES
Engine exhaust manifolds are LOG type with port­
ing for air injection into the LOG.
EXHAUST MANIFOLD—V-10 ENGINE
Engine exhaust manifolds are made of high molyb­
denum ductile cast iron. A special ribbed design helps
control permanent dimensional changes during heat
cycles.