1998 DODGE RAM 1500 check oil

is the primary engine speed indicator for the engine
after the engine is running.
REMOVAL
The Camshaft Position Sensor (CMP) on the 5.9L
diesel engine is located below the fuel injection
pump. It is bolted to the back of the timing gear
housing (Fig. 9).
(1) Disconnect electrical connector at CMP sensor
(Fig. 9).
(2) Remove sensor mounting bolt.
(3) Carefully twist sensor from timing gear hous-
ing.
(4) Check condition of sensor o-ring.
INSTALLATION
(1) Clean out machined hole in back of timing gear
housing (cover).
(2) Apply a small amount of engine oil to sensor
o-ring.
(3) Install sensor into timing gear housing (cover)
with a slight rocking action. Do not twist sensor into
position as damage to o-ring may result.
CAUTION: Before tightening sensor mounting bolt,
be sure sensor is completely flush to back of timingchain housing (cover). If sensor is not flush, dam-
age to sensor mounting tang may result.
(4) Install mounting bolt and tighten. Refer to
Torque Specifications.
(5) Connect electrical connector to sensor.
CRANKSHAFT POSITION
SENSOR
DESCRIPTION
The Crankshaft Position Sensor (CKP) on the die-
sel engine is attached at the front / left side of the
engine next to the engine harmonic balancer (crank-
shaft damper).
OPERATION
The Crankshaft Position Sensor (CKP) is the pri-
mary engine speed indicator for the engine after the
engine is running (Fig. 10). The CKP contains a hall
effect device. A rotating, notched target wheel (tone-
wheel) for the CKP is located on the engine harmonic
balancer (Fig. 11). This hall effect device detects
notches located on the tonewheel. As the tonewheel
rotates, the notches pass the tip of the CKP.
Fig. 8 5.9L DIESEL CMP
1 - CMP
2 - FUEL INJECTION PUMP (BOTTOM)
3 - ELECTRONIC CONTROL MODULE (ECM)
4 - ECM ELEC. CONNECTOR
5 - CMP ELEC. CONNECTOR
6 - CMP MOUNTING BOLT
7 - BACK OF TIMING GEAR HOUSING
Fig. 9 5.9L DIESEL CMP
1 - CMP
2 - FUEL INJECTION PUMP (BOTTOM)
3 - ELECTRONIC CONTROL MODULE (ECM)
4 - ECM ELEC. CONNECTOR
5 - CMP ELEC. CONNECTOR
6 - CMP MOUNTING BOLT
7 - BACK OF TIMING GEAR HOUSING
14 - 72 FUEL INJECTION - DIESELDR
CAMSHAFT POSITION SENSOR (Continued)

INSTALLATION
(1)Inspect fuel injector:
(a) Look for burrs on injector inlet.
(b) Check nozzle holes for hole erosion or plug-
ging.
(c) Inspect end of nozzle for burrs or rough
machine marks.
(d) Look for cracks at nozzle end.
(e) If any of these conditions occur, replace injec-
tor.
(2) Thoroughly clean fuel injector cylinder head
bore. Blow out bore hole with compressed air.
(3) The bottom of fuel injector is sealed to cylinder
head bore with a copper sealing washer (shim) of acertain thickness (Fig. 20). A new shim with correct
thickness must always be re-installed after removing
injector. Measure thickness of injector shim (Fig. 21).
Shim Thickness: 1.5 mm (.060º)
(4) Install new shim (washer) to bottom of injector.
Apply light coating of clean engine oil to washer. This
will keep washer in place during installation.
(5) Install new o-ring to fuel injector. Apply small
amount of clean engine oil to o-ring.
Fig. 18 FUEL INJECTORS
1 - SOLENOID CONNECTIONS
2 - ROCKER HOUSING
3 - FUEL INJECTOR
4 - PASSTHROUGH CONNECTOR
Fig. 19 FUEL INJECTOR REMOVER - #9010
Fig. 20 FUEL INJECTOR SEALING WASHER (SHIM)
LOCATION
1 - FUEL INJECTOR
2 - COPPER SEALING WASHER (SHIM)
Fig. 21 MEASURING INJECTOR SEALING WASHER
(SHIM)
1 - SHIM
DRFUEL INJECTION - DIESEL 14 - 77
FUEL INJECTOR (Continued)

INTAKE AIR HEATER RELAY
DESCRIPTION
The 2 intake manifold air heater relays are located
in the engine compartment. They are attached to a
common bracket. This bracket is attached to the
right battery tray (Fig. 29).
OPERATION
The Engine Control Module (ECM) operates the 2
heating elements through the 2 intake manifold air
heater relays.
Refer to Powertrain Diagnostic Procedures for an
electrical operation and complete description of the
intake heaters, including pre-heat and post-heat
cycles.
REMOVAL
The 2 intake manifold air heater relays are located
in the engine compartment. They are attached to a
common bracket. This bracket is attached to the
right battery tray (Fig. 29).
The mounting bracket and both relays are replaced
as an assembly.
(1) Disconnect both negative battery cables at both
batteries.
(2) Disconnect four relay trigger wires at both
relays. Note position of wiring before removing.
(3) Lift four rubber shields from all 4 cables.(4) Remove four nuts at cable connectors. Note
position of wiring before removing.
(5) Remove relay mounting bracket bolts and
remove relay assembly.
INSTALLATION
(1) Install relay assembly to battery tray. Tighten
mounting bolts to 4.5 N´m (40 in. lbs.) torque.
(2) Connect eight electrical connectors to relays.
(3) Connect battery cables to both batteries.
INTAKE AIR TEMPERATURE
SENSOR/MAP SENSOR
DESCRIPTION
The combination, dual function Intake Manifold
Air Temperature Sensor/MAP Sensor is installed into
the top of the intake manifold.
OPERATION
The combination, dual function Intake Manifold
Air Temperature Sensor/MAP Sensor is installed into
the top of the intake manifold with the sensor ele-
ment extending into the air stream.
The IAT portion of the sensor provides an input
voltage to the Engine Control Module (ECM) indicat-
ing intake manifold air temperature. The MAP por-
tion of the sensor provides an input voltage to the
ECM indicating turbocharger boost pressure.
REMOVAL
The combination, dual function Intake Manifold
Air Temperature Sensor/MAP (IAT/MAP) sensor is
installed into the top of the intake manifold (Fig. 30).
(1) Clean area around sensor.
(2) Disconnect electrical connector from IAT/MAP
sensor.
(3) Remove two T-15 Torx headed screws.
(4) Remove sensor from intake manifold.
(5) Check condition of sensor o-ring (Fig. 31).
INSTALLATION
(1) Check condition of sensor o-ring.
(2) Lubricate sensor o-ring with clean engine oil.
(3) Clean sensor mounting area at intake mani-
fold.
(4) Position sensor into intake manifold.
(5) Install and tighten 2 sensor mounting screws
to 1 N´m (9 in. lbs.) torque.
(6) Connect electrical connector to sensor.
Fig. 29 INTAKE MANIFOLD AIR HEATER RELAYS
1 - BATTERY
2 - CABLES TO INTAKE HEATERS
3 - RELAY TRIGGER WIRES
4 - INTAKE AIR HEATER RELAYS (2)
14 - 82 FUEL INJECTION - DIESELDR

CAUTION: Do not overtighten the vise on the gear
case. This may affect the adjustment
(3) Hold the steering gear upside down over a
drain pan and rotate the input shaft back and forth
several times lock-to-lock to discharge the fluid from
the steering gear
(4) Rotate the input shaft to the left stop and then
back-off approximately 45 degrees. Using an inch-
pound torque wrench on the input shaft, record the
peak torque required to slowly and evenly rotate the
input shaft clockwise
1¤2turn (180 degrees) starting
from the 45 degree position. This peak torque read-
ing is the preload torque. The preload torque must be
within2-10in-lbs.
(5) Rotate the input shaft to its center of travel
(approximately 1.5 turns from either stop). Place the
torque wrench on the input shaft with the handle in
the vertical position. Rotate the torque wrench slowly
and evenly
1¤4turn (90 degrees) each side of center
and record the peak torque measure on or near cen-ter. This total on-center torque reading must be5-9
in-lbs higher than the previously measured preload
torque without exceeding a total of 17 in-lbs. The
value of the total on-center minus the preload torque
is defined as the meshload torque
(6) If required, adjust the on-center torque by loos-
ening the adjuster screw lock nut and turning the
adjuster screw until the total on-center and meshload
torque readings fall within the specified values. Turn
the adjuster screw clockwise to increase and counter-
clockwise to decrease the torque reading. While hold-
ing the adjuster screw in place, tighten the lock nut
to 31 N´m (23 ft. lbs.).
(7) Re-check the preload and on-center torque
readings.
(8) Install pitman arm on the steering gear (Refer
to 19 - STEERING/LINKAGE/PITMAN ARM -
INSTALLATION).
(9) Reinstall steering gear to the vehicle (Refer to
19 - STEERING/GEAR - INSTALLATION).
SPECIFICATIONS
POWER STEERING GEAR
SPECIFICATIONS
DESCRIPTION SPECIFICATION
Steering Gear
TypeRecirculating Ball
Gear Code & Ratio 12.5:1
TORQUE SPECIFICATIONS
DESCRIPTION N´m Ft. Lbs. In. Lbs.
Preload
Torque0.23-1.13 Ð 2-10
Meshload Torque 0.56-1.02 Ð 5-9
+ Preload (17 Max)
19 - 22 GEAR - LINK/COILDR
GEAR - LINK/COIL (Continued)

(7) Install the input shaft seal protector 8986 (Fig.
20).
(8) Coat the new seal inhigh temp greaseand
Install the new oil seal using special tool 8987 driver
and C-4171 handle (Fig. 21).
NOTE: Drive the oil seal into the housing until the
outer edge does not quite clear the snap ring
groove.
(9) Insert the snap ring into the housing. Using
special tool 8987 driver and C-4171 handle push the
snap ring and oil seal together until the snap ring
seats in the groove.NOTE: Generous amounts of the high temperature
grease from the seal kit should be applied to areas
between the pitman shaft bearing and oil seals and
also between the dust seals and snap ring.
(10) Install the new dust seal usinghigh temp
grease, special tool C-4171 (driver) and 8987 (han-
dle).
(11) Check to make sure the gear is centered in
the middle tooth before installing the pitman shaft
(Fig. 19).
(12) Install the pitman shaft into the steering gear
(Refer to 19 - STEERING/GEAR/PITMAN SHAFT -
INSTALLATION).
(13) Perform over-center meshload adjustment
(Refer to 19 - STEERING/GEAR - ADJUSTMENTS).
(14) Install the steering gear to the vehicle (Refer
to 19 - STEERING/GEAR - INSTALLATION).
(15) Perform a wheel alignment (Refer to 2 - SUS-
PENSION/WHEEL ALIGNMENT - STANDARD
PROCEDURE).
PITMAN SHAFT
REMOVAL
REMOVAL - GAS
(1) Separate the pitman arm from the gear box
(Refer to 19 - STEERING/LINKAGE/PITMAN ARM -
REMOVAL).
(2) Clean exposed end of pitman shaft and housing
with a wire brush.
(3) Rotate the steering wheel from stop to stop and
count the number of turns.
(4) Center the steering wheel by rotating it from
the stop back 1 1/2 turns to achieve center position.
(5) Remove the pitman shaft cover bolts.
NOTE: The pitman shaft will not clear the housing if
it is not centered.
(6) Remove the pitman shaft from the gear (Fig.
22).
(7) Remove the cover if needed by loosing the
adjuster nut, Then removing the cover from the pit-
man shaft.
REMOVAL - DIESEL
(1) Separate the pitman arm from the gear box
(Refer to 19 - STEERING/LINKAGE/PITMAN ARM -
REMOVAL).
(2) Remove the steering gear box (Refer to 19 -
STEERING/GEAR - REMOVAL).
(3) Install the steering gear in a soft jawed bench
vise.
Fig. 20 INPUT SHAFT SEAL PROTECTOR
1 - INPUT SHAFT
2 - SPECIAL TOOL 8986
Fig. 21 INPUT SHAFT SEAL INSTALLATION
1 - VALVE HOUSING
2 - SPECIAL TOOL 8987
3 - SPECIAL TOOL C-4171
19 - 30 GEAR - LINK/COILDR
STEERING GEAR INPUT SHAFT SEAL (Continued)

PUMP
TABLE OF CONTENTS
page page
PUMP
DESCRIPTION.........................39
OPERATION...........................40
DIAGNOSIS AND TESTING - PUMP LEAKAGE . 40
STANDARD PROCEDURE
STANDARD PROCEDURE - POWER
STEERING PUMP - INITIAL OPERATION....40
STANDARD PROCEDURE - FLUSHING
POWER STEERING SYSTEM............40
REMOVAL
REMOVAL - GAS......................41
REMOVAL - DIESEL...................41
INSTALLATION
INSTALLATION - GAS..................42
INSTALLATION - DIESEL................42
SPECIFICATIONS
TORQUE CHART......................42
FLUID
DESCRIPTION.........................43
STANDARD PROCEDURE - POWER
STEERING FLUID LEVEL CHECKING......43
FLUID COOLER
REMOVAL.............................43
INSTALLATION.........................43
HOSES - I.F.S.
REMOVAL
REMOVAL - RETURN HOSE - GEAR TO
COOLER............................44
REMOVAL - PRESSURE HOSE...........44
REMOVAL - RETURN HOSE - RESERVOIR
TO COOLER.........................44INSTALLATION
INSTALLATION - RETURN HOSE - GEAR TO
COOLER............................44
INSTALLATION - PRESSURE HOSE.......44
INSTALLATION - RETURN HOSE -
RESERVOIR TO COOLER...............44
HOSES - LINK/COIL
REMOVAL
REMOVAL - RETURN HOSE - GEAR TO
COOLER............................45
REMOVAL - PRESSURE HOSE...........45
REMOVAL - RETURN HOSE - RESERVOIR
TO COOLER.........................45
INSTALLATION
INSTALLATION - RETURN HOSE - GEAR TO
COOLER............................45
INSTALLATION - PRESSURE HOSE.......45
INSTALLATION - RETURN HOSE -
RESERVOIR TO COOLER...............45
POWER STEERING PRESSURE SWITCH
DESCRIPTION.........................46
OPERATION...........................46
REMOVAL - 3.7L & 5.7L..................46
INSTALLATION - 3.7L & 5.7L...............46
PULLEY
REMOVAL.............................47
INSTALLATION.........................47
RESERVOIR
REMOVAL.............................47
INSTALLATION.........................47
PUMP
DESCRIPTION
CAUTION: MOPARTATF+4 is to be used in the
power steering system. No other power steering or
automatic transmission fluid is to be used in the
system. Damage may result to the power steering
pump and system if any other fluid is used, and do
not overfill.The pump is connected to the steering gear via the
pressure hose and the return hose. The pump shaft
has a pressed-on pulley that is belt driven by the
crankshaft pulley.
All vehicles are equipped with a power steering
fluid cooler.
NOTE: Power steering pumps are not interchange-
able with pumps installed on other vehicles.
DRPUMP 19 - 39

OPERATION
Hydraulic pressure is provided for the power steer-
ing gear by the belt driven power steering pump (Fig.
1). The power steering pumps are constant flow rate
and displacement, vane-type pumps.
DIAGNOSIS AND TESTING - PUMP LEAKAGE
The pump is serviced as an assembly and should
not be disassembled. The plastic pump reservoir and
the reservoir o-rings can be replaced.
Check for leaks in the following areas:
²Pump shaft seal behind the pulley
²Pump to reservoir O-ring
²Reservoir cap
²Pressure and return lines
²Flow control valve fitting
STANDARD PROCEDURE
STANDARD PROCEDURE - POWER STEERING
PUMP - INITIAL OPERATION
WARNING: THE FLUID LEVEL SHOULD BE
CHECKED WITH ENGINE OFF TO PREVENT INJURY
FROM MOVING COMPONENTS.
CAUTION: MOPARTATF+4 is to be used in the
power steering system. No other power steering or
automatic transmission fluid is to be used in the
system. Damage may result to the power steeringpump and system if any other fluid is used, and do
not overfill.
Wipe filler cap clean, then check the fluid level.
The dipstick should indicateCOLDwhen the fluid is
at normal temperature.
(1) Turn steering wheel all the way to the left
(2) Fill the pump fluid reservoir to the proper level
and let the fluid settle for at least two (2) minutes.
(3) Raise the front wheels off the ground.
(4) Slowly turn the steering wheel lock-to-lock 20
times with the engine off while checking the fluid
level.
NOTE: For vehicles with long return lines or oil
coolers turn wheel 40 times.
(5) Start the engine. With the engine idling main-
tain the fluid level.
(6) Lower the front wheels and let the engine idle
for two minutes.
(7) Turn the steering wheel in both direction and
verify power assist and quiet operation of the pump.
If the fluid is extremely foamy or milky looking,
allow the vehicle to stand a few minutes and repeat
the procedure.
CAUTION: Do not run a vehicle with foamy fluid for
an extended period. This may cause pump damage.
STANDARD PROCEDURE - FLUSHING POWER
STEERING SYSTEM
Flushing is required when the power steering/hy-
draulic booster system fluid has become contami-
nated. Contaminated fluid in the steering/booster
system can cause seal deterioration and affect steer-
ing gear/booster spool valve operation.
(1) Raise the front end of the vehicle off the
ground until the wheels are free to turn.
(2) Remove the return line from the pump.
NOTE: If vehicle is equipped with a hydraulic
booster remove both return lines from the pump.
(3) Plug the return line port/ports at the pump.
(4) Position the return line/lines into a large con-
tainer to catch the fluid.
(5) While an assistant is filling the pump reservoir
start the engine.
(6) With the engine running at idle turn the wheel
back and forth.
NOTE: Do not contact or hold the wheel against the
steering stops.
(7) Run a quart of fluid through the system then
stop the engine and install the return line/lines.
Fig. 1 POWER STEERING PUMP
1 - 3.7L & 4.7L (6 GROOVE)
PHENOLIC (PLASTIC TYPE) PULLEY
1 - 5.7L,5.9L & 8.0L (7 GROOVE)
PHENOLIC (PLASTIC TYPE) PULLEY
1 - 5.9L DIESEL (8 GROOVE)
STEEL PULLEY
2 - PUMP ASSEMBLY
3 - RESERVOIR
4 - CAP
19 - 40 PUMPDR
PUMP (Continued)

FLUID
DESCRIPTION
The recommended fluid for the power steering sys-
tem is MopartATF +4.
MopartATF+4, when new is red in color. The
ATF+4 is dyed red so it can be identified from other
fluids used in the vehicle such as engine oil or anti-
freeze. The red color is not permanent and is not an
indicator of fluid condition, As the vehicle is driven,
the ATF+4 will begin to look darker in color and may
eventually become brown.THIS IS NORMAL.
ATF+4 also has a unique odor that may change with
age. Consequently, odor and color cannot be used to
indicate the fluid condition or the need for a fluid
change.
STANDARD PROCEDURE - POWER STEERING
FLUID LEVEL CHECKING
WARNING: FLUID LEVEL SHOULD BE CHECKED
WITH THE ENGINE OFF TO PREVENT PERSONAL
INJURY FROM MOVING PARTS.
CAUTION: MOPARTATF+4 is to be used in the
power steering system. No other power steering or
automatic transmission fluid is to be used in the
system. Damage may result to the power steering
pump and system if any other fluid is used, and do
not overfill.
The power steering fluid level can be viewed on the
dipstick attached to the filler cap. There are two
ranges listed on the dipstick, COLD and HOT. Before
opening power steering system, wipe the reservoir
filler cap free of dirt and debris. Remove the cap and
check the fluid level on its dipstick. When the fluid is
at normal ambient temperature, approximately 21ÉC
to 27ÉC (70ÉF to 80ÉF), the fluid level should read
between the minimum and maximum area of the cold
range. When the fluid is hot, fluid level is allowed to
read up to the highest end of the HOT range. Only
add fluid when the vehicle is cold.
Use only MopartATF+4Do not overfill the
power steering system.
FLUID COOLER
REMOVAL
(1) Drain and siphon the power steering fluid.
(2) Disconnect the return and supply hoses con-
nected to the power steering fluid cooler.
(3) Remove the mounting bracket bolts securing
the fluid cooler to the brace. (Fig. 4)& (Fig. 5)(4) Remove the fluid cooler from the vehicle.
INSTALLATION
(1) Install the fluid cooler to the vehicle.
(2) Install the mounting bracket bolts securing the
fluid cooler to the brace (Fig. 4)& (Fig. 5).
(3) Reclamp the return and supply hoses to the
power steering fluid cooler.
(4) Refill the power steering fluid (Refer to 19 -
STEERING/PUMP - STANDARD PROCEDURE).
Fig. 4 V6 & V8 P/S FLUID COOLER
1 - POWER STEERING FLUID COOLER
2 - MOUNTING BOLTS
Fig. 5 V10 & DIESEL P/S FLUID COOLER
1 - RADIATOR
2 - POWER STEERING HOSES
3 - MOUNTING BOLTS
4 - P/S FLUID COOLER
DRPUMP 19 - 43