DODGE RAM 2001 Service Repair Manual

(2) Install the exhaust pipe onto exhaust mani-
folds, tighten 31 N´m (23 ft. lbs.).
(3) Tighten all clamp nuts to 48 N´m (35 ft. lbs.)
torque.
(4) Lower the vehicle.
(5) Start the engine and inspect for exhaust leaks
and exhaust system contact with the body panels. A
minimum of 25.4 mm (1.0 in.) is required between
exhaust system components and body/frame parts.
Adjust the alignment, if needed.
CATALYTIC CONVERTER - 5.9L
HEAVY DUTY/8.0L
DESCRIPTION
The stainless steel catalytic converter is located
under the vehicle, attached to the exhaust pipe(s).
OPERATION
The catalytic converter captures and burns any
unburned fuel mixture exiting the combustion cham-
bers during the exhaust stroke of the engine. This
process aids in reducing emissions output.
REMOVAL
(1) Raise and support vehicle.
(2) Saturate the bolts and nuts with heat valve
lubricant. Allow 5 minutes for penetration.
(3) Remove clamps and nuts (Fig. 5) (Fig. 6).
(4) Remove the catalytic converter.
Fig. 4 Catalytic Converter and Exhaust Pipe 3.9L,
5.2L and 5.9L Light Duty ( California )
1 - BOLT
2 - RETAINER
3 - EXHAUST MANIFOLD
4 - NUT
5 - MINI CATALYTIC CONVERTER
6 - CATALYTIC CONVERTER WITH PIPES
Fig. 5 Catalytic Converter 5.9L Heavy Duty
1 - DOWN PIPE RIGHT
2 - CLAMP
3 - CLAMP
4 - HANGER ASSY. DUAL CLAMP
5 - MUFFLER
6 - EXTENSION PIPE
7 - CATALYTIC CONVERTER
8 - DOWN PIPE LEFT
Fig. 6 Catalytic Converter 8.0L
1 - CLAMPS
2 - CATALYTIC CONVERTERS
3 - MUFFLER
4 - HANGER ASSY. DUAL CLAMP
5 - EXTENSION PIPES
6 - DOWN PIPE
11 - 6 EXHAUST SYSTEMBR/BE
CATALYTIC CONVERTER - 3.9L/5.2L/5.9L (Continued)

INSPECTION
Look at the stainless steel body of the converter,
inspect for bulging or other distortion that could be a
result of overheating. If the converter has a heat
shield attached make sure it is not bent or loose.
If you suspect internal damage to the catalyst, tap-
ping the bottom of the catalyst with a rubber mallet
may indicate a damaged core.
INSTALLATION
(1) Assemble converter and clamps loosely in
place.
(2) Tighten all clamp nuts to 48 N´m (35 ft. lbs.)
torque.
(3) Lower the vehicle.
(4) Start the engine and inspect for exhaust leaks
and exhaust system contact with the body panels. A
minimum of 25.4 mm (1.0 in.) is required between
exhaust system components and body/frame parts.
Adjust the alignment, if needed.
EXHAUST PIPE - 3.9L/5.2L/
5.9L
REMOVAL
(1) Raise and support the vehicle.
(2) Saturate the bolts and nuts with heat valve
lubricant. Allow 5 minutes for penetration.
(3) Remove exhaust pipe to manifold bolts, retain-
ers and nuts (Fig. 7).
(4) Remove the clamp nuts (Fig. 7).
(5) Remove the exhaust pipe.
INSPECTION
Discard rusted clamps, broken or worn supports
and attaching parts. Replace a component with orig-inal equipment parts, or equivalent. This will assure
proper alignment with other parts in the system and
provide acceptable exhaust noise levels.
INSTALLATION
(1) Position the exhaust pipe for proper clearance
with the frame and underbody parts. A minimum
clearance of 25.4 mm (1.0 in.) is required.
(2) Position the exhaust pipe to manifold. Install
the bolts, retainers and nuts. Tighten the nuts to 31
N´m (23 ft. lbs.) torque.
(3) Tighten the clamp nuts to 48 N´m (35 ft. lbs.)
torque.
(4) Lower the vehicle.
(5) Start the engine and inspect for exhaust leaks
and exhaust system contact with the body panels.
Adjust the alignment, if needed.
Fig. 7 Exhaust Pipe 3.9L,5.2L, 5.9L Light Duty
1 - EXHAUST PIPE WITH CATALYTIC CONVERTER
2 - CLAMP
3 - MUFFLER
BR/BEEXHAUST SYSTEM 11 - 7
CATALYTIC CONVERTER - 5.9L HEAVY DUTY/8.0L (Continued)

EXHAUST PIPE - 5.9L HEAVY
DUTY/8.0L
REMOVAL
(1) Raise and support the vehicle.
(2) Saturate the bolts and nuts with heat valve
lubricant. Allow 5 minutes for penetration.
(3) Remove exhaust pipe to manifold bolts, retain-
ers and nuts (Fig. 8).
(4) Remove the clamp nuts (Fig. 9) (Fig. 10).
(5) Disconnect the exhaust pipe from the support
hangers on the 5.9L (Heavy Duty) and the 8.0L
engines (Fig. 8).
(6) Remove the exhaust pipe.
Fig. 8 Exhaust Pipe 8.0L and 5.9L Heavy Duty
1 - BOLT
2 - RETAINER
3 - NUT4 - DOWN PIPE
5 - DOWN PIPE
11 - 8 EXHAUST SYSTEMBR/BE

INSPECTION
Discard rusted clamps, broken or worn supports
and attaching parts. Replace a component with orig-
inal equipment parts, or equivalent. This will assure
proper alignment with other parts in the system and
provide acceptable exhaust noise levels.
INSTALLATION
(1) Connect the exhaust pipe support hangers on
the (Fig. 8).
(2) Position the exhaust pipe for proper clearance
with the frame and underbody parts. A minimum
clearance of 25.4 mm (1.0 in.) is required.
(3) Position the exhaust pipe to manifold. Install
the bolts, retainers and nuts. Tighten the nuts to 31
N´m (23 ft. lbs.) torque.
(4) Tighten the clamp nuts to 48 N´m (35 ft. lbs.)
torque.
(5) Lower the vehicle.
(6) Start the engine and inspect for exhaust leaks
and exhaust system contact with the body panels.
Adjust the alignment, if needed.
EXHAUST PIPE - 5.9L DIESEL
REMOVAL
(1) Disconnect the battery negative cables.
(2) Raise and support the vehicle on a hoist.
(3) Saturate the bolts and nuts with heat valve
lubricant. Allow 5 minutes for penetration.
(4) Remove the exhaust pipe-to-extension pipe
clamp. Separate the exhaust pipe and extension pipe.
(5) Remove the exhaust pipe-to-turbocharger elbow
bolts (Fig. 11).
(6) Remove the exhaust pipe from the transmis-
sion support (Fig. 11).
INSPECTION
Discard rusted clamps, broken or worn supports
and attaching parts. Replace a component with orig-
inal equipment parts, or equivalent. This will assure
Fig. 9 Catalytic Converter and Clamp Location 5.9L
Heavy Duty
1 - DOWN PIPE RIGHT
2 - CLAMP
3 - CLAMP
4 - HANGER ASSY. DUAL CLAMP
5 - MUFFLER
6 - EXTENSION PIPE
7 - CATALYTIC CONVERTER
8 - DOWN PIPE LEFT
Fig. 10 Catalytic Converter and Clamp Location 8.0L
1 - CLAMPS
2 - CATALYTIC CONVERTERS
3 - MUFFLER
4 - HANGER ASSY. DUAL CLAMP
5 - EXTENSION PIPES
6 - DOWN PIPE
Fig. 11 Exhaust Pipe Removal/Installation
1 - EXHAUST PIPE
2 - TURBOCHARGER EXHAUST PIPE
BR/BEEXHAUST SYSTEM 11 - 9
EXHAUST PIPE - 5.9L HEAVY DUTY/8.0L (Continued)

proper alignment with other parts in the system and
provide acceptable exhaust noise levels.
INSTALLATION
(1) Install the exhaust pipe into the transmission
support and onto the turbocharger flange (Fig. 11).
(2) Install the exhaust pipe-to-turbocharger elbow
bolts and tighten to 31 N´m (23 ft. lbs.) torque.
(3) Install the extension pipe and clamp to the
exhaust pipe using a new clamp and tighten the
clamp nuts to 48 N´m (35 ft. lbs.) torque.
(4) Lower the vehicle.
(5) Connect the battery negative cables.
(6) Start the engine and inspect for exhaust leaks
and exhaust system contact with the body panels. A
minimum of 25.4 mm (1.0 in.) is required. Adjust the
alignment, if needed.
HEAT SHIELDS
DESCRIPTION
There are two types of heat shields used. One is
stamped steel the other is molded foil sheets. The
shields attach to the vehicle around the exhaust sys-
tem to prevent heat from the exhaust system fromentering the passenger area and other areas where
the heat can cause damage to other components.
REMOVAL
(1) Raise and support the vehicle.
(2) Remove the nuts or bolts holding the exhaust
heat shield to the floor pan, crossmember or bracket.
(3) Slide the shield out around the exhaust system.
INSTALLATION
(1)Position the exhaust heat shield to the floor pan,
crossmember or bracket and install the nuts or bolts.
(2)Tighten the nuts and bolts 11 N´m (100 in. lbs.).
(3) Lower the vehicle.
MUFFLER - 3.9L/5.2L/5.9L/8.0L
REMOVAL
(1) Raise and support the vehicle.
(2) Saturate the clamp nuts with heat valve lubri-
cant. Allow 5 minutes for penetration.
(3) Disconnect the muffler hanger (Fig. 12) (Fig.
13).
(4) Remove clamps and nuts (Fig. 12) (Fig. 13).
(5) Remove the muffler.
Fig. 12 Muffler for 3.9L, 5.2L and 5.9L-Light Duty Engines
1 - TAILPIPE
2 - CLAMP
3 - MUFFLER LIGHT DUTY
11 - 10 EXHAUST SYSTEMBR/BE
EXHAUST PIPE - 5.9L DIESEL (Continued)

INSTALLATION
(1) Assemble muffler and clamps loosely to permit
proper alignment of all parts.
(2) Connect the muffler hanger.
(3) Tighten the clamp nuts to 48 N´m (35 ft. lbs.)
torque.
(4) Lower the vehicle.
(5) Start the engine and inspect for exhaust leaks
and exhaust system contact with the body panels. A
minimum of 25.4 mm (1.0 in.) is required between
exhaust system components and body/frame parts.
Adjust the alignment, if needed.
MUFFLER - 5.9L DIESEL
REMOVAL
(1) Disconnect the battery negative cables.
(2) Raise and support the vehicle.
(3) Remove the muffler to tail pipe and extension
pipe clamps (Fig. 14).
(4) Disconnect the muffler from the hanger isola-
tors (Fig. 14).
(5) Disconnect the muffler from the tailpipe.
(6) Disconnect the muffler from the extension pipe
and remove from the vehicle..
INSTALLATION
(1) Install the muffler hanger rods into the isola-
tors (Fig. 14).(2) Install the muffler into the extension pipe.
(3) Install the muffler into the tail pipe.
(4) Install the exhaust clamps, align the exhaust
system, and tighten the exhaust clamps to 48 N´m
(35 ft. lbs.) torque.
(5) Lower the vehicle.
(6) Connect the battery negative cables.
(7) Start the engine and inspect for exhaust leaks
and exhaust system contact with the body panels. A
minimum of 25.4 mm (1.0 in.) is required between
exhaust system components and body/frame parts.
Adjust the alignment, if needed.
TAILPIPE - 3.9L/5.2L/5.9L
REMOVAL
(1) Raise and support the vehicle.
(2) Saturate the clamp nuts with heat valve lubri-
cant. Allow 5 minutes for penetration.
(3) Disconnect the exhaust tailpipe support
hanger.
(4) Remove clamps and nuts.
(5) Remove the exhaust tailpipe.
INSPECTION
Discard rusted clamps, broken or worn supports
and attaching parts. Replace a component with orig-
Fig. 13 Muffler for 5.9L Heavy Duty and 8.0L
1 - HANGER
2 - TAILPIPE
3 - CLAMP
4 - MUFFLER
5 - INSULATOR
Fig. 14 Muffler Removal/Installation
1 - HANGER BRACKETS
2 - ISOLATOR
3 - TAILPIPE
4 - CLAMP
5 - MUFFLER
6 - EXTENSION PIPE
7 - HANGER W/CLAMP
BR/BEEXHAUST SYSTEM 11 - 11
MUFFLER - 3.9L/5.2L/5.9L/8.0L (Continued)

inal equipment parts, or equivalent. This will assure
proper alignment with other parts in the system and
provide acceptable exhaust noise levels.
INSTALLATION
(1) Loosely assemble exhaust tailpipe to permit
proper alignment of all parts.
(2) Connect the support hangers.
(3) Position the exhaust tailpipe for proper clear-
ance with the underbody parts.
(4) Tighten all clamp nuts to 48 N´m (35 ft. lbs.)
torque.
(5) Lower the vehicle.
(6) Start the engine and inspect for exhaust leaks
and exhaust system contact with the body panels. A
minimum of 25.4 mm (1.0 in.) is required between
the exhaust system components and body/frame
parts. Adjust the alignment, if needed.
TAILPIPE - 5.9L HEAVY
DUTY/8.0L
REMOVAL
(1) Raise and support the vehicle.
(2) Saturate the clamp nuts with MopartRust
Penetrant. Allow 5 minutes for penetration.
(3) Disconnect the exhaust tailpipe support hang-
ers (Fig. 15).
(4) Remove clamps and nuts.
(5) Remove the exhaust tailpipe.
INSPECTION
Discard rusted clamps, broken or worn supports
and attaching parts. Replace a component with orig-
inal equipment parts, or equivalent. This will assure
proper alignment with other parts in the system and
provide acceptable exhaust noise levels.
INSTALLATION
(1) Loosely assemble exhaust tailpipe to permit
proper alignment of all parts (Fig. 15).
(2) Connect the support hangers (Fig. 15).
(3) Position the exhaust tailpipe for proper clear-
ance with the underbody parts.
(4) Tighten all clamp nuts to 48 N´m (35 ft. lbs.)
torque.
(5) Lower the vehicle.
(6) Start the engine and inspect for exhaust leaks
and exhaust system contact with the body panels. A
minimum of 25.4 mm (1.0 in.) is required between
the exhaust system components and body/frame
parts. Adjust the alignment, if needed.
TAILPIPE - 5.9L DIESEL
REMOVAL
(1) Disconnect the battery negative cables.
(2) Raise and support the vehicle.
(3) Saturate the clamp nuts with heat valve lubri-
cant. Allow 5 minutes for penetration.
(4) Disconnect the exhaust tailpipe support hanger
isolators (Fig. 16).
(5) Remove the muffler-to-tailpipe clamps (Fig. 16).
(6) Remove the tailpipe from the vehicle.
INSPECTION
Discard rusted clamps, broken or worn supports
and attaching parts. Replace a component with orig-
inal equipment parts, or equivalent. This will assure
proper alignment with other parts in the system and
provide acceptable exhaust noise levels.
INSTALLATION
(1) Install the tailpipe into the muffler.
(2) Install the tailpipe hanger rods into the isola-
tors (Fig. 16)
(3) Install the exhaust clamp, align the exhaust
system, and tighten the clamp 48 N´m (35 ft. lbs.)
torque.
(4) Lower the vehicle.
(5) Connect the battery negative cables.
Fig. 15 TAILPIPE 8.0L AND 5.9L HEAVY DUTY
1 - HANGER
2 - TAILPIPE
3 - CLAMP
4 - MUFFLER
5 - INSULATOR
11 - 12 EXHAUST SYSTEMBR/BE
TAILPIPE - 3.9L/5.2L/5.9L (Continued)

(6) Start the engine and inspect for exhaust leaks
and exhaust system contact with the body panels.
Adjust the alignment, if needed.
RESONATOR
REMOVAL
(1) Disconnect the battery negative cables.
(2) Raise vehicle on hoist.
(3) Remove the exhaust clamps from the resonator
to extension pipes (Fig. 17).
(4) Separate the resonator from the front and rear
extension pipes (Fig. 17) and remove the resonator
from the vehicle.
INSTALLATION
(1) Assemble the resonator to the front and rear
extension pipes (Fig. 17).
(2) Install new exhaust clamps, align the exhaust
system, and tighten the exhaust clamps to 48 N´m
(35 ft. lbs.) torque.
(3) Lower the vehicle.
(4) Connect the battery negative cables.
(5) Start the engine and inspect for exhaust leaks.
TURBOCHARGER
DESCRIPTION
The turbocharger is an exhaust-driven super-
charger which increases the pressure and density of
the air entering the engine. With the increase of air
entering the engine, more fuel can be injected into
the cylinders, which creates more power during com-
bustion.
The turbocharger assembly consists of four (4)
major component systems (Fig. 18) (Fig. 19):
²Turbine section
²Compressor section
²Bearing housing
²Wastegate
OPERATION
Exhaust gas pressure and energy drive the tur-
bine, which in turn drives a centrifugal compressor
that compresses the inlet air, and forces the air into
the engine through the charge air cooler and plumb-
ing. Since heat is a by-product of this compression,
the air must pass through a charge air cooler to cool
the incoming air and maintain power and efficiency.
Increasing air flow to the engine provides:
²Improved engine performance
²Lower exhaust smoke density
²Improved operating economy
²Altitude compensation
²Noise reduction.
Fig. 16 Tailpipe Removal/Installation
1 - HANGER BRACKETS
2 - ISOLATOR
3 - TAILPIPE
4 - MUFFLER
Fig. 17 Resonator Removal/Installation
1 - EXTENSION PIPE
2 - RESONATOR
3 - EXTENSION PIPE
4 - CLAMP
BR/BEEXHAUST SYSTEM 11 - 13
TAILPIPE - 5.9L DIESEL (Continued)

The turbocharger also uses a wastegate (Fig. 20),
which regulates intake manifold air pressure andprevents over boosting at high engine speeds. When
the wastegate valve is closed, all of the exhaust gases
flow through the turbine wheel. As the intake mani-
fold pressure increases, the wastegate actuator opens
the valve, diverting some of the exhaust gases away
from the turbine wheel. This limits turbine shaft
speed and air output from the impeller.
The turbocharger is lubricated by engine oil that is
pressurized, cooled, and filtered. The oil is delivered
to the turbocharger by a supply line that is tapped
into the oil filter head. The oil travels into the bear-
ing housing, where it lubricates the shaft and bear-
ings (Fig. 21). A return pipe at the bottom of the
Fig. 18 Turbocharger Operation
1 - TURBINE SECTION
2 - EXHAUST GAS
3 - BEARING HOUSING
4 - COMPRESSOR SECTION
5 - INLET AIR
6 - COMPRESSED AIR TO ENGINE
7 - EXHAUST GAS
8 - EXHAUST GAS TO EXHAUST PIPE
Fig. 19 Turbocharger Wastegate Actuator
1 - TURBOCHARGER
2 - DIAPHRAGM
3 - WASTE GATE ACTUATOR
Fig. 20 Wastegate Operation
1 - SIGNAL LINE
2 - EXHAUST BYPASS VALVE
3 - WASTEGATE
4 - EXHAUST
5 - TURBINE
6 - EXHAUST BYPASS VALVE
7 - WASTEGATE
8 - EXHAUST
9 - TURBINE
10 - SIGNAL LINE
11 - 14 EXHAUST SYSTEMBR/BE
TURBOCHARGER (Continued)

bearing housing, routes the engine oil back to the
crankcase.
The most common turbocharger failure is bearing
failure related to repeated hot shutdowns with inad-
equate ªcool-downº periods. A sudden engine shut
down after prolonged operation will result in the
transfer of heat from the turbine section of the tur-
bocharger to the bearing housing. This causes the oil
to overheat and break down, which causes bearing
and shaft damage the next time the vehicle is
started.
Letting the engine idle after extended operation
allows the turbine housing to cool to normal operat-
ing temperature. The following chart should be used
as a guide in determining the amount of engine idle
time required to sufficiently cool down the turbo-
charger before shut down, depending upon the type
of driving and the amount of cargo.
REMOVAL
(1) Disconnect the battery negative cables.
(2) Raise vehicle on hoist.
(3) Disconnect the exhaust pipe from the turbo-
charger elbow (Fig. 22).
(4) Lower vehicle.
(5) Disconnect the turbocharger air inlet hose (Fig.
23).
(6) Disconnect the turbocharger oil supply line and
the oil drain tube from the turbocharger (Fig. 24).
(7) Disconnect the charge air cooler inlet pipe from
the turbocharger (Fig. 24).(8) Remove the turbocharger and gasket from the
exhaust manifold.
(9) If the turbocharger is not to be installed imme-
diately, cover the opening to prevent material from
entering into the manifold.
(10) If replacing the turbocharger, transfer the dis-
charge elbow and clamp to the new assembly.
(11) Clean and inspect the sealing surface.
Fig. 21 Turbocharger Oil Supply and Drain
1 - BEARINGS
2 - OIL SUPPLY (FROM FILTER HEAD)
3 - OIL RETURN (TO SUMP)
Fig. 22 Exhaust Pipe Removal/Installation
1 - EXHAUST PIPE
2 - TURBOCHARGER EXHAUST PIPE
Fig. 23 Turbocharger Air Inlet Hose
1 - AIR FILTER HOUSING COVER
2 - TURBOCHARGER
3 - AIR INLET TUBE
4 - HOSE CLAMP
5 - HINGE TABS
6 - FILTER MINDER
7 - CLIPS (4)
8 - TUBE ALIGNMENT NOTCHES
BR/BEEXHAUST SYSTEM 11 - 15
TURBOCHARGER (Continued)