fuel pump DODGE TRUCK 1993 Service Service Manual

(7) Install vibration damper.
(8) Install fuel lines (refer to Group 14, Fuel Sys­

tem).

(9) Install water pump and housing assembly us­
ing new gaskets (refer to Group 7, Cooling System).
Tighten bolts to 41 N-m (30 ft. lbs.) torque.
(10) Install power steering pump (refer to Group

19,
Steering).
(11) Install the serpentine belt (refer to Group 7,
Cooling System). (12) Install the cooling system fan. Tighten the
bolts to 23 N-m (17 ft. lbs.) torque. (13) Position the fan shroud and install the bolts.
Tighten the bolts to 11 N-m (95 in. lbs.) torque. (14) Fill cooling system (refer to Group 7, Cooling
System for the proper procedure). (15) Connect the negative cable to the battery.

FRONT CRANKSHAFT
OIL
SEAL
REPLACEMENT
The oil seal can be replaced without removing the
timing chain cover provided the cover is not mis­ aligned. (1) Disconnect the negative cable from the battery.
(2) Remove vibration damper.
(3) If front seal is suspected of leaking, check front
oil seal alignment to crankshaft. The seal installa­
tion/alignment tool 6635, should fit with minimum interference. If tool does not fit, the cover must be re­
moved and installed properly. (4) Place a suitable tool behind the lips of the oil
seal to pry the oil seal outward. Be careful not to
damage the crankshaft seal surface of cover. (5) Place the smaller diameter of the oil seal over
Front Oil Seal Installation Tool 6635 (Fig. 6). Seat
the oil seal in the groove of the tool. (6) Position the seal and tool onto the crankshaft
(Fig. 7). (7) Using the vibration damper bolt, tighten the
bolt to draw the seal into position on the crankshaft (Fig. 8). (8) Remove the vibration damper bolt and seal in­
stallation tool. (9) Install the vibration damper.
(10) Connect the negative cable to the battery.

CAMSHAFT
This procedure requires that the engine is removed
from the vehicle. The camshaft has an integral oil pump and distrib­
utor drive gear (Fig. 9).

REMOVAL
(1) Remove intake manifold.
(2) Remove cylinder head covers.
(3) Remove timing case cover and timing chain.
(4) Remove rocker arms.
(5) Remove push rods and tappets. Identify each
part so it can be installed in its original location.
THRUST
PLATE
OIL PUMP
AND

DISTRIBUTOR DRIVE
GEAR
INTEGRAL

WITH
CAMSHAFT
•CAMSHAFT SPROCKET
J8309-71
Fig.
9 Camshaft and
Sprocket Assembly
(6) Remove distributor and lift out the oil pump
and distributor drive shaft. (7) Remove camshaft thrust plate, note location of
oil tab (Fig. 10).

THRUST PLATE
REAR
SIDE

J9209-132

Fig.
10 Timing
Chain
Oil Tab
Installation

(8) Install a long bolt into front of camshaft to fa­
cilitate removal of the camshaft. Remove camshaft,
being careful not to damage cam bearings with the cam lobes.

REMOVAL-BEARING
(1) With engine completely disassembled, drive out
rear cam bearing core hole plug. (2) Install proper size adapters and horseshoe
washers (part of Camshaft Bearing Remover/Installer
Tool C-3132-A) at back of each bearing shell. Drive out bearing shells (Fig. 11).

INSTALLATION-BEARING
(1) Install new camshaft bearings with Camshaft
Bearing Remover/Installer Tool C-3132-A by sliding
the new camshaft bearing shell over proper adapter.
(2) Position rear bearing in the tool. Install horse-

•

5.9L
(DIESEL)
ENGINE
9 -
107
5.9L
(DIESEL)
ENGINE
SERVICE
PROCEDURES

INDEX

page

Camshaft
127

Crankshaft
138

Cylinder
Block
129

Cylinder
Head
113

Engine
Assembly
. 109

Engine
Front
Mounts
(Insulators
/
Brackets)
... 107

Engine
Rear Support
108

Gear
Housing
/
Cover
122

General
Information
107

Oil Cooler Element
/
Gasket
. 149
Oil
Filter
148
page

Oil
Filter
Bypass
Valve
. 148

Oil Pan
/
Suction Tube
146

Oil Pressure Regulator Valve
/
Spring
148

Oil Pump
146
Piston
/
Connecting
Rod
Assembly
134

Rocker
Levers
/
Push
Rods
112

Specifications—5.9L Diesel Engines
151

Tappet
125

Timing
Pin
123

Valve Clearance
Adjustment
...............
121

Valves
and
Valve Springs
116

GENERAL INFORMATION The
5.9
Liter
(359 CID)
six-cylinder diesel engine
is
an
In-line valve-in head type
(Fig. 1).

Fig.
1
Diesel
Engine
Description
This engine
is
designed
for No.2
Diesel Fuel. Only
use
No.l
Diesel Fuel where extended arctic condi­
tions exist (below -23°C
or -10°F).

Engine lubrication system consists
of a
gerotor
type
oil
pump
and a
full flow
oil
filter with
a
bypass valve.
The cylinders
are
numbered from front
to
rear;
1,

2,
3, 4, 5 and 6. The
firing order
is
1-5-3-6-2-4
(Fig.

2).
J898D-10
Fig.
2
Firing Order
The engine data plate
is
located
on the
driver side
of
the
engine forward
of the
fuel injection pump.
ENGINE FRONT MOUNTS (INSULATORS
/

BRACKETS)
REMOVAL (1) Raise hood
and
position
fan to
assure clearance
for radiator
top
tank
and
hose.
(2) Raise vehicle
on a
hoist. Support
the
engine.
(3) Remove
the
through-bolts
and
nuts from
the

bracket
(Fig. 3).

(4) Remove
the
nuts from insulator studs
(Fig. 3).
(5) Raise engine with
a
lifting fixture only
far

enough
to
remove
the
insulators
and
brackets. Mark
the locating
pin
position.
(6) Remove
the
engine mounting brackets from
the

engine block.
Engine Type
In-line
6
(Diesel-Turbo)
Bore and Stroke 102.0 x 120.0 mm
(4.02x4.72 in.)
Displacement 5.9L (359 cu.
in.)

Compression Ratio 17.5:1
Torque 542 N-m (400 ft. lbs.)

@
1,750 rpm
Firing Order
1-5-3-6-2-4

Lubrication Pressure Feed - Full Flow
Filtration w/Bypass Filter
Engine Oil Capacity
11.4L
(12.0 Qts) w/Filter
Cooling System Liquid Cooled
-
Forced
Circulation
Cooling Capacity
Manual Trans 15.2L (16.0 Qts)
Automatic Trans 16.2L (17.0 Qts)
Recovery Bottle 0.95L(1.0Qts)
Cylinder Block.... Cast Iron
Crankshaft Induction Hardened
Forged Steel
Cylinder Head Cast Iron
Combustion Chambers High Swirl Bowl
Camshaft.... Chilled Cast Iron
Pistons Cast Aluminum
Connecting Rods Forged Steel
J9209-48

- 5.9L
(DIESEL)
ENGINE
9 - 111
J9109-1 13

Fig.
13
Starter
Connections
(22) Disconnect the vacuum pump lines.

(23)
Disconnect all electrical connections from the
engine. Put tags on the connections to identify their
locations.
(24) Disconnect the fuel lines to the lift pump and
fuel return. Use tags to identify the lines (Fig. 14).

Fig.
14
Lift
Pump
and
Fuel
Lines

(25) Put a cover or tape over all engine openings.
(26) Make sure that the lifting brackets are
mounted with the eye up. If not, remove the bracket
and install in the proper position. Tighten the lifting
bracket bolts to 77 N«m (57 ft. lbs.) torque. (27) Use the lifting brackets to apply tension to
the engine. Remove the engine mount through-bolts from the cylinder block mounting bracket.

CAUTION:
When
removing the
engine,
take care not
to
damage
the wiper motor and voltage regulator
mounted
on the
dash
panel (Fig. 15).
(28) Lift the engine out of the vehicle (Fig. 16).
(29) Install the engine on a suitable stand.
(30) Remove all accessories and brackets not previ­
ously removed for use with the replacement engine.
Fig.
15 Wiper Motor/Voltage Regulator

ENGINE

/
HOIST

Ml
J9109-H

Fig.
16 Lifting
Engine
from Vehicle
INSTALLATION

(1) If removed, install and tighten the rear engine
lifting bracket to 77 N-m (57 ft. lbs.) torque. DO
NOT exceed this torque valve.
(2) Check the data plate to verify that the replace­
ment engine is the same model and rating as the en­ gine that was removed.

(3)
Install all accessories and brackets that had
been removed from the previous engine. (4) Use the lifting brackets to lift the engine off of
the stand.

9
- 112 5.9L
(DIESEL)
ENGINE

• (5) Position the engine in the chassis and install
the through bolt. Tighten the through bolt nut to 41
N-m (30 ft. lbs.) torque. (6) Make sure the lifting brackets are mounted
with the eye down. (7) Remove the covers or tape covering the engine
openings. (8) Connect the fuel lines to the lift pump and fuel
return.
(9) Connect all electrical connections.
(10) Connect the power steering lines.
(11) Raise and support the vehicle on a hoist.
(12) AUTOMATIC TRANSMISSION:

CAUTION:
If new
flex
plate is installed, remove

flashing
from the engine
back
plate at the 5 and 7
o'clock
positions.

(a) Rotate converter until alignment mark on the
converter is aligned with mark on drive plate.
Off­

set holes in plate are next to 1/8 inch hole in inner
circle of drive plate.
(b) Install bell housing bolts. Tighten the bolts to
41 N-m (30 ft. lbs.) torque. (c) With the torque converter plate aligned to the
torque converter, install and tighten the bolts to 31 N-m (270 in. lbs.) torque. (d) Install the converter housing access plate.
(e) Remove the transmission support.
(13) MANUAL TRANSMISSION:
Refer to Group 21, Transmissions for the G360
Manual Transmission Installation procedure. (14) Connect the ground cable and tighten the nut
to 22 N-m (16 ft. lbs.) torque. Connect the solenoid cable and tighten the nut to 5 N-m (44 in. lbs.)
torque.
(15) Connect the transmission cooler lines.
(16) Install the exhaust pipe to the exhaust sys­
tem.
(17) Lower the vehicle.
(18) Install the A/C compressor and tighten the
bolts to 47 N-m (35 ft. lbs.) torque. If removed, con­ nect the clutch electrical wire.
(19) Install the generator. Tighten the upper
mounting bolts to 24 N-m (18 ft. lbs.) torque. Now
tighten the lower mounting bolts to 43 N-m (32 ft. lbs.) torque. Connect all wires.
(20) Install the radiator, fan/fan clutch assembly
and fan shroud (refer to Group 7, Cooling Systems
for the proper procedures). Connect the radiator

hoses.

(21) Position the intercooler inlet duct to the tur­
bocharger and the intercooler. With the clamps in po­ sition, tighten the clamp nut to 8 N-m (72 in. lbs.)
torque. (22) Position the intercooler outlet duct to the air
inlet housing and the intercooler. With the clamps in
position, tighten the clamp nut to 8 N-m (72 in. lbs.)
torque.
(23) Connect the air intake tube to the turbo­
charger inlet flange and the air cleaner housing.
Tighten the clamps to 8 N-m (72 in. lbs.) torque. (24) Install the exhaust pipe to the turbocharger.
Tighten the steady rest clamp to 8 N-m (72 in. lbs.) torque.
(25) Make sure the air intake and exhaust pipe
connections are tight and free of leaks.
(26) Fill the engine with the required amount of
clean engine lubricating oil (refer to Group 0, Lubri­ cation and Maintenance).
(27) Fill the cooling system with a mixture of 50%
water and 50% ethylene-glycol base antifreeze (refer Group 7, Cooling System for the proper procedure).
(28) Install the battery and connect the battery ca­

bles.

(29) Check the oil level after the engine has run
for 2 or 3 minutes. Oil held in the oil filter and oil passages will cause the oil level in the pan to be lower.
(30) Operate the engine at idle for 5 to 10 minutes
and check for leaks and loose parts.

ROCKER LEVERS
/
POSH
RODS

REMOVAL (1) Remove the valve covers (Fig. 1). (2) Loosen the adjusting screw locknuts. Loosen
the adjusting screws until they stop (Fig. 2).

9
- 122 5.9L
(DIESEL) ENGINE

•
GEAR
HOUSING
/
COVER

GEAR
HOUSING
REMOVAL
(1) Remove the engine assembly from the vehicle.
(2) Remove the front end components and the gear
housing cover (refer to Gear Housing Cover Removal
for the proper procedures). (3) Remove the following:
• Camshaft
• Gear driven accessories
• Fuel injection pump (refer to Group 14, Fuel Sys­
tem)
• Fan hub assembly (refer to Group 7, Cooling Sys­
tem)
(4) Remove the gear housing and gasket (Fig. 1).
(5) Clean the gasket material from the cylinder
block.

Fig.
1 Gear
Housing/Gasket

INSTALLATION
(1) Install a new gasket and the gear housing.
Tighten the bolts to 24 N*m (18 ft. lbs.) torque. (2) Install the camshaft. Make sure the alignment
marks on the camshaft and crankshaft gears are aligned (Fig. 2),
(3) If a new housing is installed, the timing pin as­
sembly must be accurately located. (4) Install the following:
• Fan hub assembly (refer to Group 7, Cooling Sys­
tem)
• Fuel injection pump (refer to Group 14, Fuel Sys­
tem) • Gear driven accessories (5) Install the gear housing cover (refer to Gear
Housing Cover Installation for the proper proce­
dures).

(6) Install the front end components.
(7) Install the engine assembly into the vehicle. J9109-104

Fig.
2 Camshaft/Crankshaft Gear
Alignment

GEAR
HOUSING COVER REMOVAL

(1) Remove fan drive assembly.
(2) Remove the fan belt (Fig. 3).
(3) Remove belt tensioner (Fig. 3).
Fig.
3 Drive Belt
Installation

(4) Remove oil fill tube and adaptor (Fig. 4).
(5) Remove vibration damper.

-158
Fig.
4 Oil Fill Tube

9
- 148 5.9L
(DIESEL) ENGINE

• Make sure the idler gear pin is installed in the lo­
cating bore in the cylinder block. (2) Install the pump. Tighten the oil pump mount­
ing bolts in two steps and in the sequence shown (Fig. 2).
• Step
1—Tighten
to 5 N«m (44 in. lbs.) torque.
• Step 2-Tighten to 24 N*m (18 ft. lbs.) torque. (3) The back plate on the pump seats against the
bottom of the bore in the cylinder block. When the
pump is correctly installed, the flange on the pump will not touch the cylinder block.
(4) Measure the idler gear to pump drive gear
backlash and the idler gear to crankshaft gear back­ lash (Fig. 8). The backlash should be 0.080-0.330 mm (0.003-0.013 inch). If the backlash is out of limits, re­
place the oil pump drive gear and the idler gear.
(5) If the adjoining gear moves when you measure
the backlash, the reading will be incorrect.

Fig.
8
idler
Gear to
Pump
Drive Gear and Crankshaft Gear
Backlash

OIL FILTER
When replacing the oil filter, Chrysler Corporation
recommends use of the replacement filter specified in
your Operator's Manual.

CAUTION:
The
internal filtering medium
of
some
fil­

ters
has
been known
to
disintegrate. Debris from
failed filters
may
plug
the
piston
oil
cooling noz­

zles,
resulting
in
scuffed pistons
and
eventual
en­

gine
failure.
REMOVAL

WARNING:
HOT OIL CAN
CAUSE PERSONAL
IN­

JURY.

(1) Operate the engine until the water tempera­
ture reaches 60°C (140°F). Shut the engine off.
(2) Use a container that can hold at least 14 liters
(15 quarts) to hold the used oil. Remove the oil drain
plug and drain the used engine oil into the container.
(3) Always check the condition of the used oil. This
can give you an indication of some engine problems
that might exist. • Thin, black oil indicates fuel dilution.
• Milky discoloration indicates coolant dilution.
(4) Clean the area around the lubricating oil filter
head. Remove the filter using a 90-95 mm filter
wrench.
(5) Clean the gasket surface of the filter head. The
filter canister O-Ring seal can stick on the filter
head. Make sure it is removed.
INSTALLATION (1) Fill the oil filter element with clean oil before
installation. Use the same type oil that will be used
in the engine.
(2) Apply a light film of lubricating oil to the seal­
ing surface before installing the filter.

CAUTION:
Mechanical over-tightening
may
distort
the threads
or
damage
the filter
element seal.

(3) Install the filter as specified by the filter man­
ufacturer. (4) Clean the drain plug and the sealing surface of
the pan. Check the condition of the threads and seal­ ing surface on the oil pan and drain plug.
(5) Install the drain plug using a new sealing washer.
Tighten the plug to 80 N-m (60 ft. lbs.) torque.
(6) Use only High-Quality Multi-Viscosity lubricat­
ing oil in the Cummins Turbo Diesel engine. Choose
the correct oil for the operating conditions outlined in Group 0, Lubrication and Maintenance.
(7) Fill the enginfe with the correct grade of new

oil.
The engine capacity is i0.4 liters (11 quarts) in
the crankcase and 0.95 liters (1 quart) in the lubri­ cating oil filter. (8) Start the engine and operate it at idle for several
minutes. Check for leaks at the filter and drain plug.
(9) Stop the engine. Wait approximately 5 minutes
to let the oil in the upper parts of the engine to drain
back to the oil pan. Check the oil level again. Add oil as necessary to bring the level to the "H" (High)
mark on the dipstick.

OIL FILTER
BYPASS
VALWE
REMOVAL
(1) Remove the oil cooler cover (Fig. 9). (2) Remove the valve from the cooler cover (Fig. 9).
INSTALLATION (1) Drive the new valve in until it bottoms against
the step in the bypass valve bore (Fig. 10).
(2) Install the oil cooler cover.

OIL PRESSURE REGULATOR VALVE
/
SPRING
When oil pressure from the oil pump exceeds 448
kPa (65 psi), the regulator valve opens to allow oil to
drain back into the pan.

5.9L
(DIESEL)
ENGINE
9-153
TORQUE
SPECIFICATIONS

COMPONENT

Air
Fuel
Control
Banjo Screw (In Pump) ....
Air
Fuel
Control
Fitting
(In
Head)

Alternator
Ground Cable Mounting to
Block

Alternator
Mounting to
Water
Pump
Inlet
..

Alternator
Pulley
Alternator
Support
(Upper)

Battery
Cable
(Negative)
Mounting to Block ,

Belt
Tensioner
Mounting
Block
Heater
Mounting

Cab
Heater
Hose
Clamp

Cab
Heater
Tubing
Clamp Mounting.......
Camshaft
Thrust
Plate

Clutch Cover Mounting to
Flywheel
...
Connecting Rod
(Alternately
tighten
in 3 steps) Step 1
Step 2
Step 3 .
Cooling Fan Mounting to
Fan
Clutch

Crossover
Clamp (Air)

Cylinder
Head
Mounting Bolts

1.
All
Bolts....

2.
Long
Bolts
.........

3.
Tighten
All
Bolts
An
Additional

Exhaust
Manifold

Exhaust
Outlet
Pipe
- V
Band
Clamp
Exhaust
Pipe
Clamp Mounting
Exhaust
Pipe
Steady
Rest
Mounting to Trans .

Fan
Clutch Mounting/Fan Hub
(L
Hand
Threads)..
Fan Hub
Bracket
Mounting
Fan Hub Bearing
Retaining
Capscrew
Fan
Pulley
to
Fan
Hub
Fan
Pulley
Crankshaft .
Fan
Shroud
Mounting Nuts

Flywheel
Bolts

Flywheel
Housing
- Adaptor

Front
Engine
Mount Isolator Mounting to Mount..

Front
Engine
Mount Through Bolt

Front
Engine
Mount to Block

Front
Oil
Filler
Pipe
-
Access
Cover

Fuel
Banjo Screw (In
Fuel
Pump)

Fuel
Banjo Screw (In
Head)

Fuel
Banjo Screw (In
Injector)

Fuel
Filter

Fuel
Heater
Assembly
Mounting

Fuel
Heater
Ground Mounting to
Intake
Manifold

Fuel
Link
Fitting
(High Pressure)

Fuel
Low Pressure Supply

Fuel
Pump
Drive
Gear
(With
Pump
Unlocked)

Fuel
Pump Lock (Bosch)
TORQUE

12 N-m 9 ft. lbs.
8 N-m 6 ft. lbs.
24 N-m 18 ft. lbs.
41 N*m 30 ft. lbs.
80 N-m 60 ft. lbs.
24 N-m 18 ft. lbs.
77 N-m 57 ft. lbs.
43 N-m 32 ft. lbs.
12 N-m 9 ft. lbs.
4 N-m (35 in. lbs.)
24 N-m 18 ft. lbs.
24 N-m 18 ft. lbs.
23 N-m 17 ft. lbs.
35 N-m 26 ft. lbs.
70 N-m 51 ft. lbs.
100 N-m 73 ft. lbs.
20 N-m 15 ft. lbs.

5
N-m (44 in. lbs.)
90 N-m 66 ft. lbs.
120 N-m 89 ft. lbs.
90°
43 N-m 32 ft. lbs.
8 N-m (72 in. lbs.)
27 N-m 20 ft. lbs.
68 N-m 50 ft. lbs.
57 N-m 42 ft. lbs.
24 N-m 18 ft. lbs.
77 N-m 57 ft. lbs.
9 N-m 7 ft. lbs.
9 N-m 7 ft. lbs.
11 N-m (95 in. lbs.)
137 N-m 101 ft. lbs.
60 N-m 44 ft. lbs.
109 N-m 80 ft. lbs.
41 N-m 30 ft. lbs.
60 N-m 44 ft. lbs.
Hand
Tighten

32 N-m 24 ft. lbs.
24 N-m 18 ft. lbs.
8 N-m 6 ft. lbs.
Vi
Turn
after
contact

32 N-m 24 ft. lbs.
12 N-m 9 ft. lbs.
24 N-m 18 ft. lbs.
24 N-m 18 ft. lbs.
65 N-m 48 ft. lbs.
30 N-m 22 ft. lbs.
J9109-261

9
- 154 5.9L
(DIESEL)
ENGINE

TORQUE
SPECIFICATIONS
(CONT.J

COMPONENT
TORQUE

Fuel
Pump
Mounting
Nut
..

Fuel
Pump
Solenoid

Fuel
Pump
Support
Bracket
Fuel
Pump
Unlock
(Bosch)
.

Fuel
Vent
Screw
(In Banjo)
.

Gear
Cover

Gear
Housing-to-Block

Injector
Retaining Nut.

Intake
Manifold
Cover

Intercooler
Attaching
Bolts
•
•
Intercooler
Duct
Clamp
Nuts.

Lift
Pump
Mounting
Lifting Bracket (Rear)
..

Main
Bearing
Cap
Bolts.
Step!.

Step
2.

Steo3.

Oil
Cooler
Assembly

Oil
Fill
Tube Bracket
Oil
Filter
Oil
Pan
Drain
Plug
Oil
Pan
Mounting.........
Oil
Pressure
Regulator
Plug
Oil
Pressure
Sender/Switch
Oil
Pump
Mounting
Oil
Suction
Tube (Flange)
..

Oil
Suction
Tube
Brace

Power Steering
Pump
to
Vacuum
Pump
Mounting
Radiator Hose Clamp
-
Upper
Radiator Mounting Nuts Rear Seal Mounting
Refrigerant
Compressor
Lines
-
Flange Mounting
Refrigerant
Compressor
Mounting
Rocker Lever Nut
Rocker Support

Starter
Mounting

Starter
Battery
(Positive) Cable Nut

Starter
Solenoid Nut

Tappet
Cover/Fuel Drain Line Supports
Thermistor
,

Thermostat Housing

Throttle
Bracket Mounting to Mounting Bracket.

Throttle
Rod
Mounting to
Throttle
Lever Nut
...

Timing Pin Flange Mounting
Torque Converter
Access
Cover
Plate
Mounting
Transfer
Case
Linkage Bracket Mounting/Trans Transfer
Case
Mounting to
Transmission
..
24
N-m

18
ft.
lbs.
43
N-m
32 ft. lbs.
24
N-m
18
ft.
lbs.
13
N-m
10
ft. lbs.
8
N-m
6 ft. lbs.
24
N-m
18
ft.
lbs.
24
N-m
18
ft.
lbs.
60
N-m
44
ft.
lbs.
24
N-m
18
ft.
lbs.
2
N-m
(17
in.
lbs.)
8
N-m
(72
in.
lbs.)

24
N-m
18
ft.
lbs.
77
N-m
57
ft.
lbs.
60 N-m 45 ft. lbs.
119
N-m
88
ft.
lbs.
176 N-m 129
ft.
lbs.
24
N-m
18
ft.
lbs.
43
N-m
32
ft.
lbs.
Turn
after
contact
80 N-m 60 ft. lbs.
24
N-m
18
ft.
lbs.
80 N-m 60 ft. lbs.
16
N-m
12 ft. lbs.
24
N-m
18
ft.
lbs.
24
N-m
18
ft.
lbs.
24
N-m
18
ft.
lbs.
24
N-m
18
ft.
lbs.
4
N-m
(35 in. lbs.)
11
N-m
(95 in. lbs.)
9 N-m 7
ft.
lbs.
20
N-m
15
ft.
lbs.
47
N-m
35 ft. lbs.
24
N-m
18
ft.
lbs.
24
N-m
18
ft.
lbs.
43
N-m
32
ft.
lbs.
22
N-m
16
ft. lbs.

5
N-m
(44 in. lbs.)
24
N-m
18
ft.
lbs.
24
N-m
18
ft.
lbs.
24
N-m
18
ft.
lbs.
24
N-m
18
ft.
lbs.
10 N-m
73
ft.
lbs.
5
N-m
(44 in. lbs.)
4
N-m
(35
in. lbs.)
41
N-m
30 ft. lbs.
47
N-m
35 ft. lbs.
J9109-262

•

FUEL
SYSTEM
14 - 1

FUEL
SYSTEM

page

ACCELERATOR
PEDAL
AND THROTTLE
CABLE
................ 25

DIESEL
FUEL
INJECTION-COMPONENT
DESCRIPTION/SYSTEM
OPERATION
76

DIESEL
FUEL
INJECTION-GENERAL

DIAGNOSIS
88

DIESEL
FUEL
INJECTION-SERVICE

PROCEDURES
....................... 106

FUEL
DELIVERY
SYSTEM-EXCEPT
DIESEL
.. 3

FUEL
DELIVERY-DIESEL
ENGINE
15

FUEL
TANKS
.... 20
page

GENERAL
INFORMATION 1

MULTI-PORT
FUEL
INJECTION (MPI)-
COMPONENT
DESCRIPTION/SYSTEM

OPERATION-EXCEPT
DIESEL
29

MULTI-PORT
FUEL
INJECTION (MPI)-
COMPONENT
REMOVAL/INSTALLATION-

EXCEPT
DIESEL
64

MULTI-PORT
FUEL
INJECTION (MPI)-
GENERAL
DIAGNOSIS-EXCEPT
DIESEL
...43

SERVICE
ADJUSTMENTS-DIESEL
122

SPECIFICATIONS
123

GENERAL INFORMATION

Throughout this group, references are made to par­
ticular vehicle models by alphabetical designation or
by the particular vehicle nameplate. A chart showing a breakdown of the alphabetical designations is in­
cluded in the Introduction section at the beginning of
this manual.
The 5.9L (V-8) gas powered engine will be referred
to in this group as either the: LDC (Light Duty Cy­ cle) or HDC (Heavy Duty Cycle) engine. The HDC engine can be easily identified by the use of an en­
gine mounted air injection pump. The 3.9L/5.2L/5.9L
LDC engine will not use an air injection pump.
This Fuel System group will cover all fuel system
components for the 3.9L (V-6), 5.2L (V-8), 5.9L LDC
(V-8),
5.9L HDC (V-8) and 5.9L (in-line six cylinder)
diesel engines.
The Fuel System consists of: the fuel tank, an
electric (fuel tank mounted) fuel pump and fuel fil­
ter. It also consists of fuel tubes/lines/hoses, vacuum

hoses,
throttle body and fuel injector(s).
The Fuel Delivery System consists of: the electric
fuel pump, fuel filter, fuel tubes/lines/hoses, fuel rail,
fuel injectors and fuel pressure regulator.
A Fuel Return System is used on all vehicles (all
engines) except the 5.9L (V-8) gas powered engine. On this engine, a returnless type fuel system is
used. The fuel return system consists of fuel tubes/
lines and hoses that route fuel back to the fuel tank.
The Fuel Tank Assembly consists of: the fuel
tank, filler tube, fuel gauge sending unit/electric fuel
pump module, a pressure relief/rollover valve and a
pressure-vacuum filler cap. Also to be considered part of the fuel system is the
Evaporation Control System. This is designed to
reduce the emission of fuel vapors into the atmo­ sphere. The description and function of the Evapora­
tive Control System is found in Group 25, Emission Control Systems.

FUEL
USAGE
STATEMENT-GAS
ENGINES
Your vehicle was designed to meet all emission
regulations and provide excellent fuel economy using
high quality unleaded gasoline. Only use unleaded gasolines having a minimum posted octane of 87. If your vehicle develops occasional light spark
knock (ping) at low engine speeds, this is not harm­

ful.
However, continued heavy knock at high speeds can cause damage and should be re­
ported to your dealer immediately. Engine dam­ age as a result of heavy knock operation may not be
covered by the new vehicle warranty. In addition to using unleaded gasoline with the
proper octane rating, those that contain deter­

gents,
corrosion and stability additives are rec­
ommended. Using gasolines that have these additives will help improve fuel economy, reduce
emissions and maintain vehicle performance. Gener­ ally, premium unleaded gasolines contain more addi­
tive than regular unleaded gasolines. Poor quality gasoline can cause problems such as
hard starting, stalling and stumble. If you experience
these problems, use another brand of gasoline before considering service for the vehicle.

•

FUEL SYSTEM
14 • 3
FUEL
DELIVERY SYSTEM-EXCEPT DIESEL

INDEX
page
Fuel Filter—3.9L/5.2L Gas Engine
............
10

Fuel
Filter—5.9L
Gas Engine
11
Fuel Pressure Leak Down Test—3.9L/5.2L Engine
. 8

Fuel Pressure Leak Down Test—5.9L Engine
.... 9

Fuel Pump Capacity
Test—All
Gas
Engines
..... 8

Fuel Pump
Control
........................
5

Fuel Pump Module—3.9L/5.2L Engines
3

GENERAL INFORMATION
Two different types
of
fuel delivery/fuel return sys­
tems
are
used.
The
system used with
the
3.9L/5.2L
engine will route excess fuel pressure back
to the

fuel tank through
a
fuel return line.
The
system used
with
the 5.9L
engine will
not
have
a
separate fuel
re­

turn line. This system will
be
referred
to as a re-

turnless type.
The
fuel pump module used with
the
5.9L engine will contain
a
combination fuel pressure
regulator
and
fuel filter. Refer
to the
following Fuel
Pump Module
for
additional information
or,
refer
to

the Multi-Port Fuel Injection sections
of
this Fuel System group. A separate frame mounted fuel filter will
not be

used with
any 5.9L gas
powered engine.

FUEL
PUMP
M0DULE-3.9L/5.2L
ENGINES
The fuel pump module
on
vehicles equipped with
3.9L/5.2L engines
is
installed
in the top of the
fuel
tank (Fig.
1). The
fuel pump module contains
the
fol­ lowing components (Fig.
2):

• Fuel pump
• Fuel pump reservoir
•
A
separate in-tank fuel filter
• Pressure relief/rollover valve
PRESSURE
RELIEF/
PUMP/GAUGE

Fig.
1
Top View
of
Fuel
Pump
Module—3.9U5.2L
Engine
page
Fuel Pump Module—5.9L Engine
.............
3

Fuel System Pressure Release
...............
5

Fuel System Pressure Test—3.9L/5.2L Engine
... 5
Fuel System Pressure Test—5.9L Engine
7

Fuel Tubes/Lines/Hoses
and
Clamps
..........
11

General
Information
3

Quick-Connect
Fittings
11

• Fuel pump gauge sending unit
• Fuel supply
and
return tube connections
J9114-147

Fig.
2
Fuel
Pump
Module
Components—Typical

FUEL PUMP MODULE—5.9L ENGINE
The fuel pump module
on
vehicles equipped with
a

5.9L
gas
powered engine
is
installed
in the top of
the
fuel tank
(Fig. 3). The
fuel pump module contains
the following components (Fig.
2):
• Fuel filter/fuel pressure regulator
• Fuel pump • Fuel pump reservoir
•
A
separate in-tank fuel filter
• Pressure relief/rollover valve
• Fuel pump gauge sending unit
• Fuel supply tube connection