1999 DODGE DURANGO ABS

Downloaded from www.Manualslib.com manuals search engine CRANKSHAFT MAIN BEARINGS
DESCRIPTION
Main bearings are located in the cylinder block.
One half of the main bearing is located in the crank-
shaft main bore the other half of the matching bear-
ing is located in the main bearing cap (Fig. 9). There
are five main bearings. Number three main bearing
is flanged, this flange controls crankshaft thrust.
OPERATION
The main bearings encircle the crankshaft main
bearing journals, this aligns the crankshaft to the
centerline of the engine and allows the crankshaft to
turn without wobbling or shaking therefore eliminat-
ing vibration. The main bearings are available in
standard and undersizes.
CRANKSHAFT
DESCRIPTION
The crankshaft is of a cast nodular steel splayed
type design, with five main bearing journals. The
crankshaft is located at the bottom of the engine
block and is held in place with five main bearing
caps. The number 3 counterweight is the location for
journal size identification (Fig. 10).
OPERATION
The crankshaft transfers force generated by com-
bustion within the cylinder bores to the flywheel or
flexplate.
SERVICE PROCEDURES
FORM-IN-PLACE GASKETS
There are several places where form-in-place gas-
kets are used on the engine.DO NOT use form-in-place gasket material unless specified.Care
must be taken when applying form-in-place gaskets.
Bead size, continuity and location are of great impor-
tance. Too thin a bead can result in leakage while too
much can result in spill-over. A continuous bead of
the proper width is essential to obtain a leak-free
joint.
Two types of form-in-place gasket materials are
used in the engine area (Mopar Silicone Rubber
Adhesive Sealant and Mopar Gasket Maker). Each
have different properties and cannot be used inter-
changeably.
MOPAR SILICONE RUBBER ADHESIVE SEALANT
Mopar Silicone Rubber Adhesive Sealant, normally
black in color, is available in 3 ounce tubes. Moisture
in the air causes the sealant material to cure. This
material is normally used on flexible metal flanges.
It has a shelf life of a year and will not properly cure
if over aged. Always inspect the package for the expi-
ration date before use.
MOPAR GASKET MAKER
Mopar Gasket Maker, normally red in color, is
available in 6 cc tubes. This anaerobic type gasket
material cures in the absence of air when squeezed
between smooth machined metallic surfaces. It will
not cure if left in the uncovered tube. DO NOT use
on flexible metal flanges.
SURFACE PREPARATION
Parts assembled with form-in-place gaskets may be
disassembled without unusual effort. In some
instances, it may be necessary to lightly tap the part
with a mallet or other suitable tool to break the seal
between the mating surfaces. A flat gasket scraper
may also be lightly tapped into the joint but care
must be taken not to damage the mating surfaces.
Fig. 9 Main Bearing Orientation
Fig. 10 Crankshaft with Journal Size Identification
DN5.2L ENGINE 9 - 91
DESCRIPTION AND OPERATION (Continued)

Downloaded from www.Manualslib.com manuals search engine (13) Disconnect the heater hoses and bypass hose.
(14) Remove the closed crankcase ventilation and
evaporation control systems.
(15) Remove intake manifold bolts.
(16) Lift the intake manifold and throttle body out
of the engine compartment as an assembly.
(17) Remove and discard the flange side gaskets
and the front and rear cross-over gaskets.
(18) Remove the throttle body bolts and lift the
throttle body off the intake manifold (Fig. 35). Dis-
card the throttle body gasket.
INSTALLATION
(1) If the plenum pan was removed, position pan
gasket and pan.
(2) Install plenum pan retaining bolts. (Fig. 36).
(3) Tighten plenum pan mounting bolts as follows:
²Step 1. Tighten bolts to 5.4 N´m (24 in. lbs.)
²Step 2. Tighten bolts to 9.5 N´m (84 in. lbs.)
²Step 3. Check all bolts are at 9.5 N´m (84 in.
lbs.)
(4) Using a new gasket, install the throttle body
onto the intake manifold. Tighten the bolts to 23 N´m
(200 in. lbs.) torque.
(5) Apply a bead of Mopar Silicone Rubber Adhe-
sive Sealant, or equivalent, to the four corner joints.
The sealant bead height should be slightly higher
than the cross-over gaskets, approximately 5 mm (0.2
in). An excessive amount of sealant is not required to
ensure a leak proof seal, and an excessive amount of
sealant may reduce the effectiveness of the flange
gasket.
(6) Install the front and rear cross-over gaskets
onto the engine (Fig. 37).
(7) Install the flange gaskets. Ensure that the ver-
tical port alignment tab is resting on the deck face ofthe block. Also the horizontal alignment tabs must be
in position with the mating cylinder head gasket tabs
(Fig. 38). The words MANIFOLD SIDE should be vis-
ible on the center of each flange gasket.
(8) Carefully lower intake manifold into position
on the cylinder block and cylinder heads. long studs
at the front and rear of the manifold will help to
align the intake manifold. After intake manifold is in
Fig. 35 Throttle Body Assembly
1 ± FUEL RAIL ASSEMBLY
2 ± FUEL RAIL MOUNTING BOLTS
3 ± FUEL RAIL CONNECTING HOSES
Fig. 36 Plenum Pan Bolt Tightening Sequence
Fig. 37 Cross-Over Gaskets
1 ± FRONT CROSS-OVER GASKET
2 ± REAR CROSS-OVER GASKET
9 - 104 5.2L ENGINEDN
REMOVAL AND INSTALLATION (Continued)

Downloaded from www.Manualslib.com manuals search engine place, inspect to make sure seals are in place.
Remove alignment studs if used.
(9) The following torque sequence duplicates the
expected results of the automated assembly system
(Fig. 39).²Step 1ÐTighten bolts 1 thru 4, in sequence, to 8
N´m (72 in. lbs.) torque. Tighten in alternating steps
1.4 N´m (12 in. lbs.) torque at a time.
²Step 2ÐTighten bolts 5 thru 12, in sequence, to
8 N´m (72 in. lbs.) torque.
²Step 3ÐCheck that all bolts are tightened to 8
N´m (72 in. lbs.) torque.
²Step 4ÐTighten all bolts, in sequence, to 16 N´m
(12 ft. lbs.) torque.
²Step 5ÐCheck that all bolts are tightened to 16
N´m (12 ft. lbs.) torque.
(10) Install closed crankcase ventilation and evap-
oration control systems.
(11) Install the coil wires.
(12) Connect the coolant temperature sending unit
wire.
(13) Connect the heater hoses and bypass hose.
(14) Install distributor cap and wires.
(15) Connect the accelerator linkage and, if so
equipped, the speed control and transmission kick-
down cables.
(16) Install the fuel supply line to the fuel rail.
(17) Install the accessory drive bracket and A/C
compressor.
(18) Install the generator and accessory drive belt.
Tighten generator mounting bolt to 41 N´m (30 ft.
lbs.) torque.
(19) Install the air cleaner assembly and air inlet
hose.
(20) Fill cooling system.
(21) Connect the battery negative cable.
EXHAUST MANIFOLD
REMOVAL
(1) Disconnect the battery negative cable.
(2) Raise the vehicle.
(3) Remove the exhaust pipe to manifold nuts.
(4) Lower the vehicle.
(5) Remove three nuts, heat shield and washers
from the right side exhaust manifold, if necessary
(Fig. 40).
(6) Remove two nuts, heat shield and washers
from the left side exhaust manifold, if necessary (Fig.
41).
(7) Remove bolts, nuts and washers attaching
manifold to cylinder head.
(8) Remove manifold from the cylinder head.
INSTALLATION
CAUTION: If the studs came out with the nuts when
removing the exhaust manifold, install new studs.
(1) Position the exhaust manifolds on the two
studs located on the cylinder head. Install conical
washers and nuts on these studs (Fig. 42).
Fig. 38 Intake Manifold Flange Gasket Alignment
1 ± FLANGE GASKET
2 ± ALIGNMENT TABS
3 ± CYLINDER HEAD GASKET
Fig. 39 Intake Manifold Bolt Tightening SequenceÐ
5.9L Engine
DN5.2L ENGINE 9 - 105
REMOVAL AND INSTALLATION (Continued)

Downloaded from www.Manualslib.com manuals search engine (2) Install Oil Pressure Line and Gauge Tool
C-3292. Start engine and record pressure. Refer to
Oil Pressure in Engine Specifications for the proper
pressures.
SERVICE PROCEDURES
FORM-IN-PLACE GASKETS
There are several places where form-in-place gas-
kets are used on the engine.DO NOT use form-in-
place gasket material unless specified.Care
must be taken when applying form-in-place gaskets.
Bead size, continuity and location are of great impor-
tance. Too thin a bead can result in leakage while too
much can result in spill-over. A continuous bead of
the proper width is essential to obtain a leak-free
joint.
Two types of form-in-place gasket materials are
used in the engine area (Mopar Silicone Rubber
Adhesive Sealant and Mopar Gasket Maker). Each
have different properties and cannot be used inter-
changeably.
MOPAR SILICONE RUBBER ADHESIVE SEALANT
Mopar Silicone Rubber Adhesive Sealant, normally
black in color, is available in 3 ounce tubes. Moisture
in the air causes the sealant material to cure. This
material is normally used on flexible metal flanges.
It has a shelf life of a year and will not properly cure
if over aged. Always inspect the package for the expi-
ration date before use.
MOPAR GASKET MAKER
Mopar Gasket Maker, normally red in color, is
available in 6 cc tubes. This anaerobic type gasket
material cures in the absence of air when squeezed
between smooth machined metallic surfaces. It will
not cure if left in the uncovered tube. DO NOT use
on flexible metal flanges.
SURFACE PREPARATION
Parts assembled with form-in-place gaskets may be
disassembled without unusual effort. In some
instances, it may be necessary to lightly tap the part
with a mallet or other suitable tool to break the seal
between the mating surfaces. A flat gasket scraper
may also be lightly tapped into the joint but care
must be taken not to damage the mating surfaces.
Scrape or wire brush all gasket surfaces to remove
all loose material. Inspect stamped parts to ensure
gasket rails are flat. Flatten rails with a hammer on
a flat plate, if required. Gasket surfaces must be free
of oil and dirt. Make sure the old gasket material is
removed from blind attaching holes.
GASKET APPLICATION
Assembling parts using a form-in-place gasket
requires care.
Mopar Silicone Rubber Adhesive Sealant should be
applied in a continuous bead approximately 3 mm
(0.12 inch) in diameter. All mounting holes must be
circled. For corner sealing,a3or6mm(1/8 or 1/4
inch) drop is placed in the center of the gasket con-
tact area. Uncured sealant may be removed with a
shop towel. Components should be torqued in place
while the sealant is still wet to the touch (within 10
minutes). The use of a locating dowel is recom-
mended during assembly to prevent smearing the
material off location.
Mopar Gasket Maker should be applied sparingly
to one gasket surface. The sealant diameter should
be 1.00 mm (0.04 inch) or less. Be certain the mate-
rial surrounds each mounting hole. Excess material
can easily be wiped off. Components should be
torqued in place within 15 minutes. The use of a
locating dowel is recommended during assembly to
prevent smearing the material off location.
ENGINE PERFORMANCE
It is important that the vehicle is operating to its
optimum performance level to maintain fuel economy
and the lowest emission levels. If vehicle is not oper-
ating to these standards, refer to Engine Diagnosis
outlined in this section. The following procedures can
assist in achieving the proper engine diagnosis.
(1) Test cranking amperage draw. Refer to Electri-
cal Group 8B, Cold Cranking Test.
Fig. 11 Leak-Down Tester
1 ± POINTER
2 ± WEIGHTED ARM
3 ± RAM
4 ± CUP
5 ± HANDLE
6 ± PUSH ROD
DN5.9L ENGINE 9 - 149
DIAGNOSIS AND TESTING (Continued)

Downloaded from www.Manualslib.com manuals search engine INTAKE MANIFOLD
REMOVAL
(1) Disconnect the battery negative cable.
(2) Drain the cooling system. Refer to COOLING
SYSTEM.
(3) Remove the A/C compressor. Refer to HEAT-
ING and AIR CONDITIONING.
(4) Remove the generator. Refer to CHARGING
SYSTEM.
(5) Remove the accessory drive bracket.
(6) Remove the air cleaner assembly and air inlet
hose.
(7) Perform the fuel pressure release procedure.
Refer to FUEL SYSTEM.
(8) Disconnect the fuel supply line from the fuel
rail. Refer to FUEL SYSTEM.
(9) Disconnect the accelerator linkage and, if so
equipped, the speed control and transmission kick-
down cables.
(10) Remove the distributor cap and wires.
(11) Disconnect the coil wires.
(12) Disconnect the coolant temperature sending
unit wire.
(13) Disconnect the heater hoses and bypass hose.
(14) Remove the closed crankcase ventilation and
evaporation control systems.
(15) Remove intake manifold bolts.
(16) Lift the intake manifold and throttle body out
of the engine compartment as an assembly.
(17) Remove and discard the flange side gaskets
and the front and rear cross-over gaskets.
(18) Remove the throttle body bolts and lift the
throttle body off the intake manifold (Fig. 40). Dis-
card the throttle body gasket.
INSTALLATION
(1) If the plenum pan was removed, position pan
gasket and pan.
(2) Install plenum pan retaining bolts. (Fig. 41).
(3) Tighten plenum pan mounting bolts as follows:
²Step 1. Tighten bolts to 5.4 N´m (24 in. lbs.)
²Step 2. Tighten bolts to 9.5 N´m (84 in. lbs.)
²Step 3. Check all bolts are at 9.5 N´m (84 in.
lbs.)
(4) Using a new gasket, install the throttle body
onto the intake manifold. Tighten the bolts to 23 N´m
(200 in. lbs.) torque.
(5) Apply a bead of Mopar Silicone Rubber Adhe-
sive Sealant, or equivalent, to the four corner joints.
The sealant bead height should be slightly higher
than the cross-over gaskets, approximately 5 mm (0.2
in). An excessive amount of sealant is not required to
ensure a leak proof seal, and an excessive amount of
sealant may reduce the effectiveness of the flange
gasket.
(6) Install the front and rear cross-over gaskets
onto the engine (Fig. 42).
(7) Install the flange gaskets. Ensure that the ver-
tical port alignment tab is resting on the deck face of
the block. Also the horizontal alignment tabs must be
in position with the mating cylinder head gasket tabs
(Fig. 43). The words MANIFOLD SIDE should be vis-
ible on the center of each flange gasket.
(8) Carefully lower intake manifold into position
on the cylinder block and cylinder heads. long studs
at the front and rear of the manifold will help to
align the intake manifold. After intake manifold is in
Fig. 40 Throttle Body Assembly
1 ± FUEL RAIL ASSEMBLY
2 ± FUEL RAIL MOUNTING BOLTS
3 ± FUEL RAIL CONNECTING HOSES
Fig. 41 Plenum Pan Bolt Tightening Sequence
DN5.9L ENGINE 9 - 163
REMOVAL AND INSTALLATION (Continued)

Downloaded from www.Manualslib.com manuals search engine place, inspect to make sure seals are in place.
Remove alignment studs if used.
(9) The following torque sequence duplicates the
expected results of the automated assembly system
(Fig. 44).
²Step 1ÐTighten bolts 1 thru 4, in sequence, to 8
N´m (72 in. lbs.) torque. Tighten in alternating steps
1.4 N´m (12 in. lbs.) torque at a time.
²Step 2ÐTighten bolts 5 thru 12, in sequence, to
8 N´m (72 in. lbs.) torque.
²Step 3ÐCheck that all bolts are tightened to 8
N´m (72 in. lbs.) torque.
²Step 4ÐTighten all bolts, in sequence, to 16 N´m
(12 ft. lbs.) torque.
²Step 5ÐCheck that all bolts are tightened to 16
N´m (12 ft. lbs.) torque.
(10) Install closed crankcase ventilation and evap-
oration control systems.
(11) Install the coil wires.
(12) Connect the coolant temperature sending unit
wire.
(13) Connect the heater hoses and bypass hose.
(14) Install distributor cap and wires.
(15) Connect the accelerator linkage and, if so
equipped, the speed control and transmission kick-
down cables.
(16) Install the fuel supply line to the fuel rail.
(17) Install the accessory drive bracket and A/C
compressor.(18) Install the generator and accessory drive belt.
Tighten generator mounting bolt to 41 N´m (30 ft.
lbs.) torque.
(19) Install the air cleaner assembly and air inlet
hose.
(20) Fill cooling system.
(21) Connect the battery negative cable.
Fig. 42 Cross-Over Gaskets
1 ± FRONT CROSS-OVER GASKET
2 ± REAR CROSS-OVER GASKET
Fig. 43 Intake Manifold Flange Gasket Alignment
1 ± FLANGE GASKET
2 ± ALIGNMENT TABS
3 ± CYLINDER HEAD GASKET
Fig. 44 Intake Manifold Bolt Tightening SequenceÐ
5.9L Engine
9 - 164 5.9L ENGINEDN
REMOVAL AND INSTALLATION (Continued)