Dodge Dakota (R1). Manual — part 480
INSTALLATION
2WD
(1) If
the
engine
support
bracket
(Automatic
Transmissions) was removed, position the bracket to
the transmission extension (Fig. 55). Tighten the
bolts to 68 N·m (50 ft. lbs.) torque.
NOTE: AUTOMATIC TRANSMISSION
• Install the insulator onto crossmember. Tighten
the stud nuts to 41 N·m (30 ft. lbs) torque.
• Lower the transmission and engine while align-
ing the engine support bracket to the insulator.
• Install thru-bolt in bracket and insulator.
Tighten thru-bolt nut to 68 N·m (50 ft. lbs.) torque.
NOTE: MANUAL TRANSMISSION
• Install the insulator onto crossmember. Tighten
the stud nuts to 41 N·m (30 ft. lbs) torque.
• Lower the transmission and engine while align-
ing the insulator studs into the transmission exten-
sion.
• Install the stud nuts. Tighten the stud nuts to
41 N·m (30 ft. lbs) torque.
(2) Remove transmission jack.
(3) Lower the vehicle.
(4) Connect the negative cable to the battery.
4WD
NOTE: AUTOMATIC TRANSMISSION
• If the insulator bracket was removed, install the
bracket to the transmission (Fig. 57). Tighten the
bolts to 68 N·m (50 ft. lbs.) torque.
• Install the bolts holding insulator to insulator
bracket. Tighten the bolts to 68 N·m (50 ft. lbs.)
torque.
• Lower rear of transmission while aligning the
insulator studs into the mounting support bracket.
Install stud nuts and tighten to 68 N·m (50 ft. lbs.)
torque.
NOTE: MANUAL TRANSMISSION
• Install the bolts holding insulator to insulator
bracket. Tighten the bolts to 68 N·m (50 ft. lbs.)
torque.
Fig. 56 Rear Insulator Manual Transmission—2WD
1 - TRANSMISSION EXTENSION
2 - INSULATOR
3 - CROSSMEMBER
Fig. 57 Rear Insulator Automatic Transmission—
4WD
1 - AUTOMATIC TRANSMISSION
2 - INSULATOR BRACKET
3 - INSULATOR
4 - CROSSMEMBER
9 - 108
ENGINE 3.9L
AN
REAR MOUNT (Continued)
• Lower rear of transmission while aligning the
insulator studs into the mounting support bracket.
Install stud nuts and tighten to 68 N·m (50 ft. lbs.)
torque.
(1) Remove the transmission jack.
(2) Lower the vehicle.
(3) Connect the negative cable to the battery.
LUBRICATION
DESCRIPTION
A gear-type positive displacement pump (Fig. 59) is
mounted at the underside of the rear main bearing
cap. The pump uses a pick-up tube and screen
assembly to gather engine oil from the oil pan.
OPERATION
The pump draws oil through the screen and inlet
tube from the sump at the rear of the oil pan. The oil
is driven between the drive and idler gears and
pump body, then forced through the outlet to the
block. An oil gallery in the block channels the oil to
the inlet side of the full flow oil filter. After passing
through the filter element, the oil passes from the
center outlet of the filter through an oil gallery that
channels the oil up to the main gallery, which
extends the entire length on the right side of the
block. The oil then goes down to the No. 1 main bear-
ing, back up to the left side of the block, and into the
oil gallery on the left side of the engine.
Galleries extend downward from the main oil gal-
lery to the upper shell of each main bearing. The
crankshaft is drilled internally to pass oil from the
main bearing journals to the connecting rod journals.
Each connecting rod bearing has half a hole in it, oil
passes through the hole when the rods rotate and the
hole lines up, oil is then thrown off as the rod
rotates. This oil throwoff lubricates the camshaft
lobes, distributor drive gear, cylinder walls, and pis-
ton pins.
The hydraulic valve tappets receive oil directly
from the main oil gallery. The camshaft bearings
receive oil from the main bearing galleries. The front
camshaft bearing journal passes oil through the cam-
shaft sprocket to the timing chain. Oil drains back to
the oil pan under the No. 1 main bearing cap.
The oil supply for the rocker arms and bridged
pivot assemblies is provided by the hydraulic valve
tappets, which pass oil through hollow push rods to a
hole in the corresponding rocker arm. Oil from the
rocker arm lubricates the valve train components.
The oil then passes down through the push rod guide
holes and the oil drain-back passages in the cylinder
head, past the valve tappet area, and then returns to
the oil pan (Fig. 60).
Fig. 58 Rear Insulator Manual Transmission—4WD
1 - MANUAL TRANSMISSION
2 - INSULATOR
3 - CROSSMEMBER
Fig. 59 Positive Displacement Oil Pump—Typical
1 - INNER ROTOR AND SHAFT
2 - BODY
3 - DISTRIBUTOR DRIVESHAFT (REFERENCE)
4 - COTTER PIN
5 - RETAINER CAP
6 - SPRING
7 - RELIEF VALVE
8 - LARGE CHAMFERED EDGE
9 - BOLT
10 - COVER
11 - OUTER ROTOR
AN
ENGINE 3.9L
9 - 109
REAR MOUNT (Continued)
Fig. 60 Oil Lubrication System
1 - OIL DEFLECTOR TAB
2 - BOLT
3 - ROCKER ARM PIVOT
4 - ROCKER ARM
5 - DRIP OILING FOR VALVE TIP
6 - CYLINDER HEAD BOSS
7 - TO MAIN BEARINGS
8 - TO CAMSHAFT BEARINGS
9 - ROCKER ARM
10 - HOLLOW PUSH ROD
11 - TAPPET
12 - TO CONNECTING ROD BEARINGS
13 - OIL INTAKE
14 - OIL PUMP
15 - OIL FILTER
16 - CRANKSHAFT
17 - FROM OIL PUMP
18 - OIL TO FILTER
19 - OIL FROM FILTER TO SYSTEM
20 - PASSAGE TO CAMSHAFT REAR BEARING
21 - RIGHT OIL GALLERY
22 - PLUG
23 - OIL PASSAGE FOR OIL PRESSURE INDICATOR LIGHT
24 - OIL SUPPLY VIA HOLLOW PUSH ROD SUPPLY IS FROM
OIL GALLERY METERED THROUGH HYDRAULIC TAPPET
25 - OIL SUPPLY FROM HOLLOW PUSH ROD
9 - 110
ENGINE 3.9L
AN
LUBRICATION (Continued)
DIAGNOSIS AND TESTING—ENGINE OIL
PRESSURE
(1) Remove oil pressure sending unit.
(2) Install Oil Pressure Line and Gauge Tool
C-3292. Start engine and record pressure. (Refer to 9
- ENGINE - SPECIFICATIONS).
DIAGNOSIS AND TESTING—ENGINE OIL
LEAKS
Begin with a through visual inspection of the
engine, particularly at the area of the suspected leak.
If an oil leak source is not readily identifiable, the
following steps should be followed:
(1) Do not clean or degrease the engine at this
time because some solvents may cause rubber to
swell, temporarily stopping the leak.
(2) Add an oil-soluble dye (use as recommended by
manufacturer). Start the engine and let idle for
approximately 15 minutes. Check the oil dipstick to
be sure the dye is thoroughly mixed as indicated
with a bright yellow color under a black light source.
(3) Using a black light, inspect the entire engine
for fluorescent dye, particularly at the suspected area
of oil leak. If the oil leak is found and identified,
repair per service manual instructions.
(4) If dye is not observed, drive the vehicle at var-
ious speeds for approximately 24km (15 miles), and
repeat previous step.
(5) If the oil leak source is not positively identified
at this time, proceed with the air leak detection test
method as follows:
(6) Disconnect the breather cap to air cleaner hose
at the breather cap end. Cap or plug breather cap
nipple.
(7) Remove the PCV valve from the cylinder head
cover. Cap or plug the PCV valve grommet.
(8) Attach an air hose with pressure gauge and
regulator to the dipstick tube.
CAUTION: Do not subject the engine assembly to
more than 20.6 kpa (3 PSI) of test pressure.
(9) Gradually apply air pressure from 1 psi to 2.5
psi maximum while applying soapy water at the sus-
pected source. Adjust the regulator to the suitable
test pressure that provide the best bubbles which
will pinpoint the leak source. If the oil leak is
detected and identified, repair per service manual
procedures.
(10) If the leakage occurs at the rear oil seal area,
refer to the section, Inspection for Rear Seal Area
Leak.
(11) If no leaks are detected, turn off the air sup-
ply and remove the air hose and all plugs and caps.
Install the PCV valve and breather cap hose. Proceed
to next step.
(12) Clean the oil off the suspect oil leak area
using a suitable solvent. Drive the vehicle at various
speeds approximately 24 km (15 miles). Inspect the
engine for signs of an oil leak by using a black light.
OIL
STANDARD PROCEDURE - ENGINE OIL
OIL LEVEL INDICATOR (DIPSTICK)
The engine oil level indicator is located at the right
front of the engine, left of the generator (Fig. 61).
CRANKCASE OIL LEVEL INSPECTION
CAUTION: Do not overfill crankcase with engine oil,
oil foaming and oil pressure loss can result.
To ensure proper lubrication of an engine, the
engine oil must be maintained at an acceptable level.
The acceptable levels are indicated between the ADD
and SAFE marks on the engine oil dipstick.
(1) Position vehicle on level surface.
(2) With engine OFF, allow approximately ten min-
utes for oil to settle to bottom of crankcase, remove
engine oil dipstick.
(3) Wipe dipstick clean.
(4) Install dipstick and verify it is seated in the
tube.
(5) Remove dipstick, with handle held above the
tip, take oil level reading.
(6) Add oil only if level is below the ADD mark on
dipstick.
Fig. 61 Oil Level Indicator Location
1 - CYLINDER HEAD COVER
2 - ENGINE OIL FILL CAP
3 - DIPSTICK
4 - ENGINE OIL FILTER
5 - FILTER BOSS
AN
ENGINE 3.9L
9 - 111
LUBRICATION (Continued)
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст