lock CHRYSLER VOYAGER 1996 Service Manual

(13) Remove pistons and connecting rods from
block.
(14) Remove vibration damper. Refer to procedure
in this section.
(15) Remove front cover. Refer to procedure in this
section.
(16) Remove oil pump drive gear.
(17) Install special tool VM-1004 onto crankshaft
over gear (Fig. 41).
(18) Remove main bearing oil feed and carrier
locators from block.
(19) Remove flywheel and adaptor plate from
engine block.
(20) Remove thrust bearings from rear main bear-
ing carrier (Fig. 42).
(21) Slide crankshaft and bearing carriers rear-
ward to rear of block. If you encounter difficulty in
removing the complete assembly as previously
described, slide the assembly rearward sufficiently to
gain access to the main bearing carrier bolts. Mark
the carriers for assembly and remove the bolts, two
for each carrier (Fig. 43).
(22) Separate the two halves of each carrier,
remove from the crankshaft and temporarily re-as-
semble the carriers (Fig. 44). Withdraw the crank-
shaft through the rear of the crankcase.
INSTALLATION
NOTE: Assemble engine according to sequence
described, thus saving time and preventing dam-
ages to engine components. Clean parts with a suit-
able solvent and dry them with compressed airbefore assembly. Use new gaskets where applicable
and torque wrenches for correct tightening of com-
ponents.
(1) Thoroughly clean crankcase and oil passages,
and blow dry with compressed air.
(2) Install new main bearing shells in each of the
carrier halves. Assemble the carriers to the crank-
shaft journals, ensuring that the carriers are
installed in their original locations. Secure each car-
rier with the two bolts tightening evenly to 42 N´m
(31 ft. lbs.) (Fig. 44).
(3) Slide special tool (VM-1002) over the crank-
shaft gear and, insert the crankshaft and carrier
assembly into the crankcase in the same manner
used for removal.
(4) Align the holes in the lower carriers, with the
center of the crankcase webs (Fig. 45).
(5) Secure each carrier assembly to the crankcase
with the main bearing oil feed and carrier locators
and tighten them to 54 N´m (40 ft. lbs).
(6) Install rear main bearing carrier onto crank-
shaft ensuring arrow on bearing carrier aligns with
vertical web in center of crankcase.
(7) Install rear oil seal.
(8) Install new O-rings in adaptor plate.
(9) Install adaptor plate and tighten bolts to 47
N´m (35 ft. lbs.).
(10) Install bolts to main bearing carrier and
tighten to 26.5 N´m (20 ft. lbs.).
(11) Position flywheel and O-ring on crankshaft
and align bolt holes.
NOTE: For purposes of checking crankshaft end
play used flywheel bolts may be used. Final assem-
bly requires new flywheel bolts.
(12) Install 2 flywheel bolts, 180É apart, and
tighten bolts to 20 N´m plus 60É (15 ft. lbs.) plus 60É.
(13) Attach dial indicator to engine block.
(14) Move crankshaft toward front of engine and
zero indicator.
(15) Move crankshaft toward the rear of engine
and record measurement.
(16) Subtract specified crankshaft end play from
figure obtained. Crankshaft end play 0.08 to 0.21 mm
(0.0032 to 0.0083 in.).
(17) Select thrust washers which will give correct
end play.
(18) Remove tools and flywheel.
(19) Lubricate thrust washer halves and fit them
into the rear main bearing carrier.
(20) To verify correct end play, install 2 flywheel
bolts 180É apart, and tighten bolts to 20 N´m plus 60É
(15 ft. lbs. plus 60É).
(21) Measure crankshaft end play with a dial
gauge. Crankshaft end play should not exceed 0.08-
Fig. 41 Crankshaft Special Tool VM.1004
9 - 64 ENGINENS/GS
REMOVAL AND INSTALLATION (Continued)

CAUTION: The vacuum pump must be centered in
the block and tighten with two bolts. Ensure that
the pump spins freely. If vacuum pump drags ordoes not spin freely loosen bolts and perform pro-
cedures again.
(28) Before installing oil pump check pump bore
depth in block (A) and pump body height (B) (Fig.
47). Difference between A and B should be
0.020-0.082 mm (.0007 to 0032 in.).
(29) Install oil pump and tighten retaining screws
to 27 N´m (20 ft. lbs.). Check for normal backlash
between pump and crankshaft gears.
(30) Install oil pump drive Gear.
(31) Install front cover. Refer to procedure in this
section.
(32) Install vibration damper. Refer to procedure
in this section.
(33) Install cylinder heads. Refer to procedure in
this section.
(34) Install rocker arms and push rods. Refer to
procedure in this section.
(35) Install cylinder head cover. Refer to procedure
in this section.
(36) Install accessary drive system.
(37) Install engine in vehicle. Refer to procedure in
this section.
(38) Fill engine with the correct amount of fluids
specified.
(39) Connect battery cable.OIL PAN
REMOVAL
(1) Disconnect battery cable.
(2) Raise vehicle on hoist.
Fig. 45 Main Bearing Carrier Alignment
Fig. 46 Measuring Crankshaft End Play
Fig. 47 Oil Pump Bore Depth
9 - 66 ENGINENS/GS
REMOVAL AND INSTALLATION (Continued)

(3) Drain oil.
(4) Remove oil pan bolts (Fig. 48).
(5) Remove oil pan.
INSTALLATION
(1) Install oil pan. Apply a continuous 3 mm bead
of Silicone Sealer to oil pan, install within 10 min-
utes.
(2) Install oil pan bolts and torque bolts to 11 N´m
(8 ft. lbs.).
(3) Install oil drain plug tighten to 79 N´m (58 ft.
lbs).
(4) Lower vehicle.
(5) Fill engine with proper amount of oil.
(6) Connect battery cable.
OIL PUMP
REMOVAL
(1) Raise vehicle on hoist.
(2) Remove right splash shield.
(3) Remove both accessory drive belts. Refer to
Group 7, Cooling.
(4) Remove pump shaft support bracket assembly.
(5) Remove vibration damper. Refer to Vibration
Damper Removal in this section.
NOTE: Crankshaft damper nut is left handed
thread.
(6) Remove front cover. Refer to Timing Gear
Cover Removal in this section.
(7) Remove oil pump.
INSTALLATION
(1) Install new O-ring and lubricate with clean
engine oil.
(2) Install oil pump and tighten retaining screws
to 27.5 N´m (240 in. lbs.).(3) Install front cover. Refer to Timing Gear Cover
Installation in this section.
(4) Install pump shaft support bracket assembly.
CAUTION: Correct torque on the vibration damper
nut is important or engine damage can occur.
(5) Install vibration damper. Torque nut to 441
N´m (325 ft. lbs.)
(6) Install both accessory drive belts. Refer to
Group 7, Cooling.
(7) Install right splash shield.
OIL PUMP PRESSURE RELIEF VALVE
REMOVAL
(1) Remove oil pan.
(2) Remove clip retaining relief valve.
(3) Remove relief valve cap, spring, and plunger
(Fig. 50).
(4) Check relief valve spring length. Relief valve
spring free length is 57.5mm (2.263 in.). If spring
length is less or spring is distorted it must be
replaced.
(5) Check plunger for scoring, replace if necessary.
INSTALLATION
(1) Thoroughly clean all components and relief
valve pocket in cylinder block.
(2) Fit plunger, spring and cap into block.
(3) Compress spring and install retaining clip.
Ensure clip is completely seated in groove.
Fig. 48 Oil Pan
Fig. 49 Oil Pump Drive Gear
NS/GSENGINE 9 - 67
REMOVAL AND INSTALLATION (Continued)

OIL FILTER ADAPTER AND OIL COOLER
REMOVAL
(1) Remove oil filter.
(2) Remove oil cooler adapter bolt.
(3) Remove oil cooler (Fig. 51).
INSTALLATION
(1) Install oil cooler with new gasket, tighten oil
cooler adapter bolt to 60 N´m (44 ft. lbs.).(2) Install oil filter adapter to oil cooler and
tighten to 49 N´m (36. lbs.).
(3) Install oil filter and tighten to 9.8 N´m (85 in.
lbs.) and add oil.
VACUUM PUMP
REMOVAL
(1) Remove the front cover refer to front cover
removal in this section.
(2) Remove 4 bolts.
(3) Remove vacuum pump.
INSTALLATION
(1) To install the vacuum pump, align the outer
part of the gear with the inner part using a screw-
driver or similar tool, align with timing marks on
gear set and install.
(2) Install bolts and tighten to 20 N´m (15 ft. lbs.).
(3) Install front cover.
PISTONS AND CONNECTING ROD
REMOVAL
(1) Disconnect the battery cable.
(2) Remove cylinder heads, refer to cylinder head
removal in this section.
(3) Raise vehicle on host.
(4) Remove oil pan, refer to oil pan removal in this
section.
(5) Remove top carbon ridge of cylinder bores with
a reliable ridge reamer before removing pistons from
cylinder block.Be sure to keep tops of pistons
Fig. 50 Oil Pressure Relief Valve
Fig. 51 Oil Cooler
Fig. 52 Vacuum Pump
9 - 68 ENGINENS/GS
REMOVAL AND INSTALLATION (Continued)

covered during this operation. Mark piston with
matching cylinder number.
(6) Pistons and connecting rods must be removed
from top of cylinder block. Rotate crankshaft so that
each connecting rod is centered in cylinder bore.
(7) Remove connecting rod cap. Push each piston
and rod assembly out of cylinder bore.
CAUTION: During piston and rod removal. DO NOT
rotate piston and connecting rod or damage to theoil jets extending out into the cylinder bore will
occur (Fig. 56).
NOTE: Be careful not to nick crankshaft journals.
(8) After removal, install bearing cap on the mat-
ing rod.
PISTON PINÐREMOVAL
(1) Secure connecting rod in a soft jawed vice.
(2) Remove 2 clips securing piston pin (Fig. 57).
(3) Push piston pin out of piston and connecting
rod.
Fig. 53 Vacuum Pump Parts
Fig. 54 Vacuum Pump Mounting Hole
Fig. 55 Timing Marks
Fig. 56 Oil Jets
NS/GSENGINE 9 - 69
REMOVAL AND INSTALLATION (Continued)

(4) Face chamber recess side of piston towards
camshaft.
(5) Install connecting rod bolt protectors on rod
bolts.
(6) Rotate crankshaft so that the connecting rod
journal is on the center of the cylinder bore. Insert
rod and piston into cylinder bore and guide rod over
the crankshaft journal.
CAUTION: During piston and rod installation. DO
NOT rotate piston and connecting rod or damage to
the oil jets extending out into the cylinder bore will
occur (Fig. 56).
(7) Tap the piston down in cylinder bore, using a
hammer handle. At the same time, guide connecting
rod into position on connecting rod journal.
(8) Install rod caps. Install nuts on cleaned and
oiled rod bolts and tighten nuts to 29.5 N´m (22 ft.
lb.) plus 60É.
CYLINDER LINER
REMOVAL
(1) Remove cylinder heads (refer to cylinder head
removal in this section).
(2) Remove Oil pan (refer to oil pan removal in
this section).
(3) Remove pistons (refer to piston removal in this
section).
(4) Use tool VM-1001 to remove liners (Fig. 64).
(5) Remove shims from cylinder liner or cylinder
block recess. Keep shims with each cylinder liner.
INSTALLATION
(1) Carefully clean residualsealerfrom liner and
crankcase, and degrease the crankcase where it
comes into contact with the liners. Referring to (Fig.
65), install the liners in the crankcase as shown (A),
rotating them back and forth by 45É in order to guar-
antee correct positioning.
(2) Measure the liner recess relative to block deck
with a dial indicator mounted on a special tool
VM-1010 A.All the measurements must be taken
on camshaft side. Zero dial gauge on block deck.
(3) Move dial gauge to cylinder liner record read-
ing on dial gauge.
(4) Remove liner and special tool.
(5) Then select the correct shim thickness to give
proper protrusion (0.01 - 0.06 mm).
(6) Fit the shim and the O-rings onto the liner.
(7) Lubricate the lower liner location in the block.
Apply LOCTITE 275 to the corner of the liner seat.
Apply LOCTITE 275 uniformly to the upper part of
the liner at area.
(8) Fit the liners in the crankcase making sure
that the shim is positioned correctly in the seat. Lockthe liners in position using special tool (VM-1016)
and bolts (Fig. 66). Clean the residual LOCTITE on
the upper surface of the block deck.
(9) Recheck the liner protrusion. It should be 0.01
- 0.06 mm.
NOTE: A period of six hours must elapse between
the liners being installed and engine start-up. If
engine assembly is not continued after liner instal-
lation, the liners need to be clamped for twelve
hours minimum.
(10) Refer to Cylinder Head Removal and Installa-
tion procedure in this section. To measure piston pro-
trusion for installation of proper head gasket
thickness.
CRANKSHAFTÐREMOVAL
Refer to CRANKSHAFT MAIN BEARING
REMOVAL in this section.
REAR CRANKSHAFT OIL SEAL
REMOVAL
(1) Remove transmission. Refer to Group 21,
Transmission for removal procedure.
(2) Remove flywheel.
Fig. 64 Cylinder LinerÐRemoval
9 - 72 ENGINENS/GS
REMOVAL AND INSTALLATION (Continued)

CYLINDER HEAD
CLEANING
Thoroughly clean the engine cylinder head and cyl-
inder block mating surfaces. Clean the intake and
exhaust manifold and engine cylinder head mating
surfaces. Remove all gasket material and carbon.
Check to ensure that no coolant or foreign material
has fallen into the tappet bore area.
Remove the carbon deposits from the combustion
chambers and top of the pistons.
INSPECTION
Use a straightedge and feeler gauge to check the
flatness of the engine cylinder head and block mating
surfaces (Fig. 70).
Minimum cylinder head thickness 89.95mm (3.541
in.)
CAUTION: If only one cylinder head is found to be
distorted and requires machining, it will also be
necessary to machine the remaining cylinders
heads and end plates by a corresponding amount
to maintain correct cylinder alignment.
VALVE GUIDE HEIGHT
(1) Valve Guides height requirement.
(2) Measurement A (Fig. 71): 13.50 - 14.00 mm.
VALVE STEM-TO-GUIDE CLEARANCE
MEASUREMENT
(1) Measure and record internal diameter of valve
guides. Valve guide internal diameter is 8.0 to 8.015
mm (.3149 to .3155 in.).
(2) Measure valve stems and record diameters.
Intake valve stem diameter 7.94 to 7.96 mm (.3125 to
.3133 in). Exhaust valve stem diameter 7.92 to 7.94
mm (.3118 to .31215 in).
(3) Subtract diameter of valve stem from internal
diameter of its respective valve guide to obtain valve
stem clearance in valve guide. Clearance of inlet
valve stem in valve guide is .040 to .075 mm (.0015
to .0029 in). Clearance of exhaust valve stem in valve
guide is .060 to .095 mm (.0023 to .0037 in).
(4) If valve stem clearance in valve guide exceeds
tolerances, new valve guides must be installed.
TIMING GEAR COVER
Be sure mating surfaces of timing gear cover and
cylinder block are clean and free from burrs.
Fig. 69 Rocker Arm Components
Fig. 70 Checking Cylinder Head Flatness
Fig. 71 Valve Guide Height
NS/GSENGINE 9 - 75
CLEANING AND INSPECTION (Continued)

VALVES AND VALVE SPRINGS
VALVE CLEANING
Clean all carbon deposits from the combustion
chambers, valve ports, valve stems, valve stem
guides and heads.
Clean all grime and gasket material from the
engine cylinder head machined gasket surfaces.
INSPECTION
Inspect for cracks in the combustion chambers and
valve ports.
Inspect for cracks on the exhaust seat.
Inspect for cracks in the gasket surface at each
coolant passage.
Inspect valves for burned, cracked or warped
heads.
Inspect for scuffed or bent valve stems.
Replace valves displaying any damage.
Check valve spring height. (Fig. 72).
HYDRAULIC TAPPETS
(1) Clean all tappet parts in a solvent that will
remove all varnish and carbon.
(2) Replace tappets that are unfit for further ser-
vice with new assemblies.
(3) If plunger shows signs of scoring or wear,
install a new tappet assembly. If valve is pitted, or
valve seat on end of plunger is prevented from seat-
ing, install a new tappet assembly.
OIL PUMP
CLEANING
Wash all parts in a suitable solvent and inspect
carefully for damage or wear (Fig. 74).
INSPECTION
(1) Before installing oil pump check pump bore
depth in block (A) and pump body height (B) (Fig.
73). Difference between A and B should be
0.020-0.082 mm.
(2) Check clearance between rotors (Fig. 75).
PISTON AND CONNECTING ROD
PISTONS
(1) Piston Diameter: Size Group A: 91.93-91.94mm
(3.6191-3.6196 in.) Size Group B: 91.94-91.95mm
Fig. 72 Valve Spring Chart
Fig. 73 Oil Pump Bore Depth
Fig. 74 Oil Pump Inner and Outer Rotors
9 - 76 ENGINENS/GS
CLEANING AND INSPECTION (Continued)

(3) If internal diameter of original bearing is being
checked and figures are not within specifications,
new bearings must be used.
(4) Check crankshaft main bearing journals to
bearing clearances. Clearances of main bearings is
.03 to .088mm (.0011 to .0035 in.).
OIL PAN
Remove all gasket material from cylinder block. Be
careful not gouge pan sealing surface.
CYLINDER LINER
INSPECTION
The cylinder walls should be checked for out-of-
round and taper with dail bore gauge. The cylinder
bore out-of-round is 0.100 mm (.0039 inch) maximum
and cylinder bore taper is 0.100 mm (0.0039 inch)
maximum. If the cylinder walls are badly scuffed or
scored, new liners should be installed and honed, and
new pistons and rings fitted.
Measure the cylinder bore at three levels in direc-
tions A and B (Fig. 79). Top measurement should be
10 mm (3/8 inch) down and bottom measurement
should be 10 mm ( 3/8 inch.) up from bottom of bore.
SPECIFICATIONS
2.5L VM DIESEL
DESCRIPTION...........SPECIFICATIONS
Type ......................425CLIEE (36B)
Number of Cylinder......................4
Bore..............................92mm
Stroke............................94mm
Capacity.......................2499.5 cm3
Injection Order.....................1-3-4-2
Compression Ratio...............21:1 (60.5)
Crankshaft
Front Journal Diameter....................
Nominal.................62.985±63.000 mm
±0.25....................62.735±62.750 mm
±0.125...................62.860±62.875 mm
Front Bearing Diameter....................
Nominal.................63.043±63.088 mm
±0.25....................62.793±62.838 mm
±0.125...................62.918±62.963 mm
Clearance Between Journal and Bearing:
0.043±0.103 mm..........................
Center Journal Diameter...................
Fig. 77 Piston, Connecting Rod and Pin
Fig. 78 Bearing Clearance
Fig. 79 Liner Inspection
9 - 78 ENGINENS/GS
CLEANING AND INSPECTION (Continued)

DESCRIPTION...........SPECIFICATIONS
Valve Face Angle
Intake.......................55É30'± 55É50'
Exhaust.....................45É25'± 45É35'
Valve Head Diameter
Intake.....................40.05±40.25 mm
Exhaust.....................33.8±34.0 mm
Valve Head Stand Down
Intake.......................1.08±1.34 mm
Exhaust.....................1.99±1.25 mm
Valve Stem Diameter
Intake.....................7.940±7.960 mm
Exhaust....................7.922±7.940 mm
Valve Clearance in Guide
Intake.....................0.040±0.075 mm
Exhaust....................0.060±0.093 mm
Valve Guide
Inside Diameter...............8.0±8.015 mm
Fitted Height.................13.5±14.0 mm
Valve Spring
Free Length.....................44.65 mm
Fitted Length.....................38.6 mm
Load at Fitted Length............3466% Kg
Load at Top of Lift.............92.564% Kg
Number of Coils............5.33 Valve Timing
Oil Pressure
at 4000 rpm.....3.0to4.5bar(Oil at 90±100ÉC)
Pressure Relief Valve Opens..........6.38 bar
Pressure Relief Valve±Free Length.....57.5 mm
Oil Pump
Outer Rotor End Float..........0.03±0.09 mm
Inner Rotor End Float..........0.03±0.09 mm
Outer Rotor to Body Diameter
Clearance..................0.130±0.230 mm
Rotor Body to Drive Gear Clearance (Pump Not
Fitted)......................3.27±3.73 mm
TORQUE
DESCRIPTION...................TORQUE
Generator Mounting Bracket
Bolts....................47N´m(35ft.lbs.)
Camshaft Thrust Plate Retaining Bolts
Bolt.....................24N´m(18ft.lbs.)
Cylinder Head
Bolts . . See Cylinder Head Installation Procedure
Connecting Rod
Bolts...........29.5 N´m +60É (22 ft. lbs. +60É)
Crankshaft Bearing Carrier
Bolts....................44N´m(32ft.lbs.)
Crankshaft damper (Pulley)
Nut ...................441N´m(325 ft. lbs.)
EGR Valve to Intake Manifold
Tube ....................26N´m(19ft.lbs.)DESCRIPTION...................TORQUE
EGR Tube to EGR Valve
Bolts....................26N´m(19ft.lbs.)
Engine MountÐFront
Support Bracket Engine Bolts . 68 N´m (50 ft. lbs.)
Support Bracket Transmission
Bolts...................101N´m(75ft.lbs.)
Support Cushion Crossmember
Bolts....................54N´m(40ft.lbs.)
Support Cushion Thru Bolt . . . 65 N´m (48 ft. lbs.)
Engine MountÐRear
Support Bracket Transmission
Bolts...................101N´m(75ft.lbs.)
Support Bracket to Engine
Bracket.................101N´m(75ft.lbs.)
Support Cushion Thru Bolt . . . 68 N´m (50 ft. lbs.)
Engine MountÐLeft
Transmission Mounting Bolts . 54 N´m (40 ft. lbs.)
Support Cushion Thru Bolt . . . 71 N´m (53 ft. lbs.)
Engine MountÐRight
Mount to Frame Rail Bolts . . . 68 N´m (50 ft. lbs.)
Mount Bolt (Horizontal) . . . 145 N´m (107 ft. lbs.)
Mount Bolt (Vertical).......101N´m(75ft.lbs.)
Right Engine Mount Bracket
Bolts....................40N´m(30ft.lbs.)
Exhaust Pipe to Turbocharger
Bolts...................28N´m(250 in. lbs.)
Exhaust Manifold Outlet to Turbo
Nuts....................32N´m(24ft.lbs.)
Exhaust Elbow to Turbo
Bolts....................30N´m(22ft.lbs.)
Exhaust Manifold Mounting
Nuts....................30N´m(22ft.lbs.)
Flywheel
Bolts.....SeeRear Crankshaft Seal Installation
Procedure
Engine Adaptor Plate
Bolts....................47N´m(35ft.lbs.)
Front Timing Gear Cover
Bolts....................11N´m(96in.lbs.)
Fuel Filter
Nuts...................28N´m(250 in. lbs.)
Glow Plugs
Plugs..................14N´m(120 in. lbs.)
Idler Pulley Pump Support Bracket
Nuts...................26N´m(228 in. lbs.)
Idler Pulleys (left handed threads)
Bolts....................47N´m(35ft.lbs.)
Injector Pump fuel lines
Nuts..................17.6 N´m (156 in. lbs.)
Injector Pump Gear
Lock Nut..........................86N´m
Injector Pump Mounting
Nuts..................27.5 N´m (240 in. lbs.)
9 - 80 ENGINENS/GS
SPECIFICATIONS (Continued)