1998 DODGE RAM 1500 Removal

CRANKSHAFT OIL SEAL - FRONT
REMOVAL
(1) Disconnect both battery negative cables.
(2) Raise vehicle on hoist.
(3) Partially drain engine coolant into container
suitable for re-use (Refer to 7 - COOLING - STAN-
DARD PROCEDURE).
(4) Lower vehicle.
(5) Remove radiator upper hose.
(6) Disconnect coolant recovery bottle from radia-
tor filler neck and lift bottle off of fan shroud.
(7) Disconnect windshield washer pump supply
hose and electrical connections and lift washer bottle
off of fan shroud.
(8)
Remove the fan shroud-to-radiator mounting bolts.
(9)Remove viscous fan/drive assembly. (Refer to 7 -
COOLING/ENGINE/RADIATOR FAN - REMOVAL).
(10) Remove cooling fan shroud and fan assembly
from the vehicle.
(11) Remove the accessory drive belt (Refer to 7 -
COOLING/ACCESSORY DRIVE/DRIVE BELTS -
REMOVAL).
(12) Remove the cooling fan support/hub from the
front of the engine.
(13) Raise the vehicle on hoist.
(14) Remove the crankshaft damper and speed
indicator ring.
(15) Remove power steering pump.
(16) Remove accessory drive belt tensioner.
(17) Remove the gear cover-to-housing bolts and
gently pry the cover away from the housing, taking
care not to mar the gasket surfaces. Remove crank
seal dust shield with cover.
(18) Support the cover on a flat work surface with
wooden blocks (Fig. 68), and using a suitable punch
and hammer, drive the old seal out of the cover from
the back side of the cover to the front side (Fig. 68).
INSTALLATION
(1) Clean cover and housing gasket mating sur-
faces. Use a suitable scraper and be careful not to
damage the gear housing surface. Remove any old
sealer from the oil seal bore. Thoroughly clean the
front seal area of the crankshaft. The seal lip and the
sealing surface on the crankshaft must be free from
all oil residue to prevent seal leaks.
(2) Inspect the gear housing and cover for cracks
and replace if necessary. Carefully straighten any
bends or imperfections in the gear cover with a ball-
peen hammer on a flat surface. Inspect the crank-
shaft front journal for any grooves or nicks that
would affect the integrity of the new seal.
(3) Apply a bead of MopartStud & Bearing Mount
to the outside diameter of the seal. Do not lubricate
the inside diameter of the new seal.(4)
With the cover supported by wood blocks, install
the seal into the rear of the cover using crankshaft seal
installer Special Tool 8281 and driver handle C-4171
(Fig. 69). Strike the driver handle until the installation
tool bottoms out on the inside of the cover.
CAUTION: Do not distort or damage seal.
(5) Install the plastic seal pilot (provided with seal
kit) into the crankshaft seal.
Fig. 68 Removing Seal from Cover
1 - PUNCH
Fig. 69 Installing Seal Into Cover With Tool 8281
1 - SEAL INSTALLER 8281
2 - DRIVER HANDLE C4171
3 - SEAL
DRENGINE 5.9L DIESEL 9 - 275

(6) Apply a bead of MopartSilicone Rubber Adhe-
sive Sealant or equivalent to the gear housing cover
sealing surface.
(7) Install the cover to the gear housing, aligning
the seal pilot with the nose of the crankshaft (Fig.
70).
(8) Install the cover bolts and tighten to 24 N´m
(18 ft. lbs.) torque. Remove pilot tool.
(9) Install dust shield over nose of crankshaft.
(10) Install the crankshaft damper and speed indi-
cator ring. Torque the bolts to 40 N´m (30 ft. lbs.).
Then rotate an additional 60É. Use the engine bar-
ring tool to keep the engine from rotating during
tightening operation.
(11) Install the fan support/hub assembly and
torque bolts to 32 N´m (24 ft. lbs.).
(12) Install power steering pump.
(13) Install accessory drive belt tensioner. Torque
bolt to 43 Nm (32 ft.lbs.).
(14) Install cooling fan (Refer to 7 - COOLING/EN-
GINE/RADIATOR FAN - INSTALLATION).
(15) Install the accessory drive belt (Refer to 7 -
COOLING/ACCESSORY DRIVE/DRIVE BELTS -
INSTALLATION).
(16) Refill cooling system (Refer to 7 - COOLING -
STANDARD PROCEDURE).
(17) Connect battery negative cables.
(18) Start engine and check for oil leaks.
CRANKSHAFT OIL SEAL -
REAR
REMOVAL
(1) Disconnect the battery negative cables.
(2) Remove the transmission and transfer case (if
equipped).(3) Remove the clutch cover and disc (if manual
transmission equipped) (Refer to 6 - CLUTCH/
CLUTCH DISC - REMOVAL).
(4) Remove the flywheel or converter drive plate.
(5) Drill holes 180É apart into the seal. Be careful
not to contact the drill against the crankshaft.
(6) Install #10 sheet metal screws in the drilled
holes and remove the rear seal with a slide hammer
(Fig. 71).
INSTALLATION
CAUTION: The seal lip and the sealing surface on
the crankshaft must be free from all oil residue to
prevent seal leaks. The crankshaft and seal sur-
faces must be completely dry when the seal is
installed. Use a soap and water solution on outside
diameter of seal to ease assembly.
(1) Clean the crankshaft journal with a suitable
solvent and dry with a clean shop towel or com-
pressed air. Wipe the inside bore of the crankshaft
seal retainer with a clean shop towel.
(2) Inspect the crankshaft journal for gouges,
nicks, or other imperfections. If the seal groove in the
crankshaft is excessively deep, install the new seal
1/8º deeper into the retainer bore, or obtain a crank-
shaft wear sleeve that is available in the aftermar-
ket.
(3) Install the seal pilot and new seal, provided in
the replacement kit, onto the crankshaft.
(4) Remove the seal pilot.
(5) Install the installation tool over crankshaft.
(6) Using a ball peen hammer, strike the tool at
the 12, 3, 6, and 9 o'clock positions until the align-
ment tool bottoms out on the retainer (Fig. 72).
Fig. 70 Installing Front Cover with Seal Pilot
1 - SEAL PILOT
Fig. 71 Crankshaft Rear Seal Removal
1 - NO. 10 SCREW
2 - REAR SEAL
3 - CRANKSHAFT
4 - SLIDE HAMMER
9 - 276 ENGINE 5.9L DIESELDR
CRANKSHAFT OIL SEAL - FRONT (Continued)

(7) Install the flywheel or converter drive plate.
Tighten the bolts to 137 N´m (101 ft. lbs.) torque.
(8) Install the clutch cover and disc (if equipped)
(Refer to 6 - CLUTCH/CLUTCH DISC - INSTALLA-
TION).
(9) Install the transmission and transfer case (if
equipped).
(10) Lower vehicle.
(11) Connect battery negative cables.
(12) Check engine oil level and adjust, if necessary.
(13) Start engine and check for oil leaks.
CRANKSHAFT REAR OIL SEAL
RETAINER
REMOVAL
(1) Disconnect the battery negative cables.
(2) Raise vehicle on hoist.
(3) Remove the oil pan drain plug and drain the
engine oil. Re-install plug and torque to 50 N´m (44
ft. lbs.) torque.
(4) Remove transmission and transfer case (if
equipped) from vehicle.
(5)
Remove flywheel or torque converter drive plate.
(6) Disconnect starter cables from starter motor.
(7) Remove starter motor (Refer to 8 - ELECTRI-
CAL/STARTING/STARTER MOTOR - REMOVAL)
and transmission adapter plate assembly.
(8) Remove four (4) oil pan rear bolts. Slide a
feeler gauge between the seal retainer and oil pan
gasket to break the seal.(9) Remove the six (6) retainer-to-block bolts (Fig.
73).
(10) Remove the rear seal retainer and gasket
(Fig. 73).
(11) Support the seal retainer and drive out the
crankshaft seal with a hammer and suitable punch.
INSTALLATION
(1) If using the old seal retainer, the crankshaft
seal must be replaced.
(2) Inspect oil pan gasket for nickes or cuts. If gas-
ket is damaged, the oil pan must be removed and
gasket must be replaced. Wipe oil pan gasket dry and
apply light coating of RTV.
(3) Using the retainer alignment/seal installation
tool provided in the seal service kit, install the align-
ment tool into the retainer and install to the cylinder
block (Fig. 74), using a new gasket. Tighten the six
(6) mounting bolts by hand.
(4) The seal alignment tool is used to align rear
cover properly. Starting with the center two bolts,
tighten the retainer in a circular pattern to 10 N´m
(89 in. lbs.). Remove the alignment tool.
CAUTION: The seal lip and the sealing surface on
the crankshaft must be free from all oil residue to
prevent seal leaks. The crankshaft and seal sur-
faces must be completely dry when the seal is
installed. Use a soap and water solution on outside
diameter of seal to ease assembly.
Fig. 72 Seal Installation Using Alignment Tool and
Hammer
1 - SEAL PILOT TOOL
2 - INSTALLATION TOOL
3 - SEAL
4 - RETAINER
Fig. 73 Crankshaft Rear Seal Retainer and Gasket
1 - RETAINER
2 - GASKET
3 - BOLT
DRENGINE 5.9L DIESEL 9 - 277
CRANKSHAFT OIL SEAL - REAR (Continued)

SOLID LIFTERS/TAPPETS
REMOVAL
NOTE: This procedure requires use of Miller Tool
8502 Tappet Replacement Kit.
(1) Remove camshaft (Refer to 9 - ENGINE/EN-
GINE BLOCK/CAMSHAFT & BEARINGS (IN
BLOCK) - REMOVAL).
(2) Insert the trough (provided with tool kit) the
full length of the camshaft bore (Fig. 77). Make sure
the cap end goes in first and the open side faces up
(towards tappets).
(3)Remove only one tappet at a time.Remove
rubber band from one cylinder pair and attach tappet
dowel not being removed to the next cylinder pair
(Fig. 78).
(4) Raise dowel rod (disengage from tappet) and
allow tappet to fall into trough (Fig. 79).
(5) Carefully remove trough(do not rotate)and
tappet. If the tappet is not being replaced, mark it so
it can be installed in its original location.
(6) Re-install trough and repeat procedure on
remaining tappets.
CLEANING
Clean tappet with a suitable solvent. Rinse in hot
water and blow dry with a clean shop rag or com-
pressed air.
INSPECTION
(1) Visually inspect the tappet the tappet socket,
stem, and face for excessive wear, cracks, or obvious
damage (Fig. 80).
(2) Measure the tappet stem diameter. Replace the
tappet if it falls below the minimum size (Fig. 80).
Fig. 77 Inserting the Trough - Typical
1 - TROUGH
Fig. 78 Secure Dowel/Tappet to Adjacent Cylinder -
typical
Fig. 79 Lift Dowel Rod to Disengage from Tappet -
typical
Fig. 80 Tappet Inspection
TAPPET STEM DIAMETER
15.936 mm (0.627 in.) MIN.
15.977 mm (0.629 in.) MAX.
DRENGINE 5.9L DIESEL 9 - 279

PISTON & CONNECTING ROD
DESCRIPTION
PISTONS
The piston (Fig. 85) is constructed of aluminum
and is gravity cast, free floating design. The piston
incorporates a centrally located high swirl combus-
tion bowl, and utilizes a ªkeystoneº style top com-
pression ring (Fig. 86), and a ªTapered Faceº
intermediate ring (Fig. 86), for superior cylinder wall
scraping. Piston cooling nozzles cool the piston and
pin with engine oil supplied by the crankshaft main
journals. High horsepower pistons are gallery cooled
and utilize J-jet piston cooling nozzles. Pistons are
directional in order to provide clearance to piston
cooling nozzles.
CONNECTING RODS
The connecting rods are a split angle design. They
have a pressed-in-place wrist pin bushing that is
lubricated by piston cooling nozzle oil spray.
Machined connecting rods are no longer used
in the diesel engine. Do not install machined
connecting rods into an engine that has frac-
tured split connecting rods.
Fractured split connecting rods are first manufac-
tured as a single piece and then fractured into two
pieces. Fractured split connecting rods can be identi-
fied by a rough and irregular surface at the connect-
ing rod split face. To properly assemble the rod cap to
the connecting rod, the bearing tangs on the connect-
ing rod and cap must be located on the same side of
the rod. The long end of the connecting rod must be
assembled on the intake or camshaft side of the
engine.
Each matched fractured split connecting rod and
cap is an assembly and are not interchangeable. If a
connecting rod or cap is damaged, the entire assem-
bly must be replaced.
STANDARD PROCEDURE - HEAD GASKET
SELECTION
(1) Measure piston protrusion for all six pistons.
(2) Calculate the average piston protrusion. Maxi-
mum allowable protrusion is 0.516 mm (0.020 inch).
NOTE: There are two different head gaskets avail-
able. One gasket is for Average piston protrusion
less than 0.30 mm (0.011 inch). The other gasket is
for Average piston protrusion greater than 0.30 mm
(0.011 inch)
REMOVAL
(1) Disconnect the battery cables.
(2) Remove the cylinder head (Refer to 9 -
ENGINE/CYLINDER HEAD - REMOVAL).
(3) Remove the oil pan and suction tube (Refer to 9
- ENGINE/LUBRICATION/OIL PAN - REMOVAL).
(4) Remove bolts and the block stiffener.
(5) Using Miller Tool 7471-B crankshaft barring
tool, rotate the crankshaft so all of the pistons are
below TDC.
(6) Before removing the piston(s) from the bore(s):
(a) Remove any carbon ridge formations or
deposits at the top of the bore with a dull scraper
or soft wire brush.
(b) If cylinder bore wear ridges are found, use a
ridge reamer to cut the ridge from the bore. DO
NOT remove more metal than necessary to remove
the ridge.
(7) Remove the J-jet cooling nozzles, if equipped.
Fig. 85 Piston - Typical
Fig. 86 Piston Ring Identification
DRENGINE 5.9L DIESEL 9 - 281

(4) The top surface of all of the rings are identified
with the word TOP or the supplier's MARK. Assem-
ble the rings with the word TOP or the supplier's
MARK up.
(5) Position the oil ring expander in the oil control
ring groove (bottom groove).
(6) Install the oil control ring with the end gap
OPPOSITE the ends on the expander (Fig. 95).
(7) Install the intermediate piston ring in the sec-
ond groove.
(8) Install the top piston ring in the top groove
(Fig. 96).
(9) Position the rings as shown in (Fig. 97).
VIBRATION DAMPER
REMOVAL
(1) Remove the accessory drive belt (Refer to 7 -
COOLING/ACCESSORY DRIVE/DRIVE BELTS -
REMOVAL).(2) Remove the four (4) damper to crankshaft bolts
and remove damper and speed indicator ring.
INSPECTION
(1) Inspect the damper hub for cracks and replace
if any are found.
(2) Inspect the index lines on the damper hub and
the inertia member (Fig. 98). If the lines are more
than 1.59 mm (1/16 in.) out of alignment, replace the
damper.
(3) Inspect the rubber member for deterioration or
missing segments (Fig. 99).Fig. 95 Oil Control Ring/Expander Location in
Groove
1 - OIL CONTROL RING
2 - EXPANDER
3 - PISTON
Fig. 96 Piston Ring Installation Tool
1 - PISTON RING INSTALLATION TOOL
Fig. 97 Piston Ring Orientation
1 - TOP RING
2 - INTERMEDIATE RING
3 - OIL CONTROL RING
Fig. 98 Inspect Index Lines for Alignment
1 - INDEX LINES
2 - HUB
3 - INERTIA MEMBER
DRENGINE 5.9L DIESEL 9 - 285
PISTON RINGS (Continued)

INSTALLATION
(1) Install speed indicator ring.
NOTE: The speed indicator ring is located over a
dowel pin.
(2) Install the crankshaft damper and bolts.
Tighten bolts to 40 N´m (30 ft. lbs.) torque, plus an
additional 60É.
NOTE: The damper must be installed so the hole is
located over the dowel pin.
(3) Install the accessory drive belt (Refer to 7 -
COOLING/ACCESSORY DRIVE/DRIVE BELTS -
INSTALLATION).
FRONT MOUNT
REMOVAL
(1) Disconnect the battery negative cables.
(2) Remove the viscous fan/drive assembly (Refer
to 7 - COOLING/ENGINE/RADIATOR FAN -
REMOVAL).
(3) Raise vehicle on hoist.
(4) Install engine support fixture tool# 8534 and
steel bracket tool # 8534A
(5) Loosen the thru-bolt and nut.
(6) Lift the engine SLIGHTLY and remove the
insulator to block bolts (Fig. 101) (Fig. 100).
(7) Remove the insulator from the vehicle.
Fig. 99 Inspect Damper Rubber Member
Fig. 100 RH Insulator
1 - Mount
2 - Insulator
3 - Bolt
Fig. 101 LH Insulator
1 - Bolt
2 - Insulator
3 - Mount
9 - 286 ENGINE 5.9L DIESELDR
VIBRATION DAMPER (Continued)

REAR MOUNT
REMOVAL
(1) Raise the vehicle on a hoist.
(2) Position a transmission jack in place.
(3) Remove support cushion stud nuts (Fig. 104).
(4) Raise rear of transmission and engine
SLIGHTLY.
(5) Remove the bolts holding the support cushion
to the transmission support bracket. Remove the sup-
port cushion.
(6) If necessary, remove the bolts holding the
transmission support bracket to the transmission.
INSTALLATION
(1) If removed, position the transmission support
bracket to the transmission. Install new attaching
bolts and tighten to 102 N´m (75 ft. lbs.) torque.
(2) Position support cushion to transmission sup-
port bracket. Install stud nuts and tighten to 47 N´m
(35 ft. lbs.) torque.
(3) Using the transmission jack, lower the trans-
mission and support cushion onto the crossmember
(Fig. 104).
(4) Install the support cushion bolts and tighten to
47 N´m (35 ft. lbs.) torque.
(5) Remove the transmission jack.
(6) Lower the vehicle.
Fig. 104 Engine Rear Support Cushion Assembly
9 - 288 ENGINE 5.9L DIESELDR