Chrysler Town, Dodge Caravan. Manual — part 330
OIL COOLER & LINES
DESCRIPTION
An engine oil cooler is used on 3.3/3.8L engines
(Heavy Duty Cooling Only) (Fig. 98). The cooler is a
coolant-to-oil type and mounted between the oil filter
and engine block.
OPERATION
Engine oil travels from the oil filter and into the
oil cooler. Engine oil then exits the cooler into the
main gallery. Engine coolant flows into the cooler
from the heater return tube and exits into the water
pump inlet.
REMOVAL
(1) Drain cooling system (Refer to 7 - COOLING -
STANDARD PROCEDURE - COOLING SYSTEM
DRAINING).
(2) Disconnect oil cooler inlet and outlet hoses
(Fig. 97).
(3) Remove oil filter.
(4) Remove oil cooler attachment fitting (Fig. 98).
(5) Remove oil cooler.
INSTALLATION
(1) Lubricate seal and position oil cooler to connec-
tor fitting on oil filter adapter (Fig. 98).
NOTE: Position the flat side of oil cooler parallel to
oil pan rail.
(2) Install oil cooler attachment fitting and tighten
to 27 N·m (20 ft. lbs.) (Fig. 98).
(3) Install oil filter.
(4) Connect oil cooler inlet and outlet hoses (Fig.
97).
Fig. 96 Engine Oil Level Dipstick and Fill Locations
1 - COOLANT RECOVERY CONTAINER
3 - ENGINE OIL LEVEL DIPSTICK
2 - ENGINE OIL FILL CAP
4 - RADIATOR PRESSURE CAP
Fig. 97 Engine Oil Cooler Hoses
1 - OIL COOLER INLET TUBE
2 - INLET HOSE
3 - OIL COOLER OUTLET TUBE
4 - OUTLET HOSE
5 - WATER PUMP INLET TUBE
9 - 138
ENGINE 3.3/3.8L
RS
OIL (Continued)
(5) Fill cooling system (Refer to 7 - COOLING -
STANDARD PROCEDURE - COOLING SYSTEM
FILLING).
OIL FILTER
REMOVAL
CAUTION:
When
servicing
the
oil
filter
avoid
deforming the filter can by installing the remove/in-
stall tool band strap against the can-to-base lock
seam. The lock seam joining the can to the base is
reinforced by the base plate.
(1) Using suitable oil filter wrench, turn filter
counterclockwise to remove from oil filter adapter
(Fig. 99). Properly discard used oil filter.
INSTALLATION
(1) Wipe oil filter adapter base clean and inspect
gasket contact surface.
(2) Lubricate gasket of new filter with clean
engine oil.
(3) Install new filter until gasket contacts base
(Fig. 99). Tighten filter 1 turn or 20 N·m (15 ft. lbs.).
Use filter wrench if necessary.
(4) Start engine and check for leaks.
OIL FILTER ADAPTER
REMOVAL
(1) Raise vehicle on hoist.
(2) Remove the oil filter.
(3) Disconnect oil pressure switch electrical con-
nector.
(4) Remove oil filter adapter attaching bolts (Fig.
99).
(5) Remove oil filter adapter and seal (Fig. 99).
INSTALLATION
(1) Clean oil filter adapter and install new seal.
(2) Position adapter on engine block and install
bolts (Fig. 99).
(3) Tighten adapter bolts to 28 N·m (250 in. lbs.).
(4) Connect oil pressure switch electrical connector
(Fig. 99).
(5) Install the oil filter.
(6) Lower vehicle on hoist.
(7) Start engine and allow to run approximately 2
minutes.
(8) Turn off engine and check oil level. Adjust oil
level as necessary.
Fig. 98 Engine Oil Cooler - 3.3/3.8L (Heavy Duty
Cooling)
1 - OIL FILTER ADAPTER
2 - CONNECTOR
3 - ENGINE OIL COOLER
4 - OIL COOLER ATTACHMENT FITTING
5 - OIL FILTER
Fig. 99 OIL FILTER ADAPTER
1 - SEAL
2 - OIL FILTER ADAPTER
3 - OIL FILTER
4 - BOLT
5 - OIL PRESSURE SWITCH
6 - BOLT
RS
ENGINE 3.3/3.8L
9 - 139
OIL COOLER & LINES (Continued)
OIL PAN
REMOVAL
(1) Disconnect negative cable from battery and
remove engine oil dipstick.
(2) Raise vehicle on hoist and drain engine oil.
(3) Remove drive belt splash shield.
(4) Remove strut to transaxle attaching bolt (Fig.
100). Loosen strut to engine block attaching bolts.
(5) Remove transaxle case cover (Fig. 100).
(6) Remove oil pan fasteners (Fig. 101).
(7) Remove the oil pan and gasket (Fig. 101).
CLEANING
(1) Clean oil pan with solvent and wipe dry with a
clean cloth.
(2) Clean all gasket material from mounting sur-
faces of pan and block.
(3) Clean oil screen and pick-up tube in clean sol-
vent.
INSPECTION
(1) Inspect oil drain plug and plug hole for
stripped or damaged threads and repair as necessary.
Install a new drain plug gasket. Tighten to 27 N·m
(20 ft. lbs.).
(2) Inspect oil pan mounting flange for bends or
distortion. Straighten flange if necessary.
(3) Inspect condition of oil screen and pick-up tube.
INSTALLATION
(1) Clean sealing surfaces and apply a 1/8 inch
bead of Mopar
t Engine RTV GEN II at the parting
line of the chain case cover and the rear seal retainer
(Fig. 102).
(2) Position a new pan gasket on oil pan (Fig. 101).
(3) Install oil pan and tighten fasteners to 12 N·m
(105 in. lbs.) (Fig. 101).
(4) Install cover to transaxle case (Fig. 100).
(5) Install the strut bolt to transaxle housing (Fig.
100). Tighten all bending brace bolts.
(6) Install the drive belt splash shield.
Fig. 100 Powertrain Struts and Transaxle Case
Cover
1 - BRACKET - ENGINE REAR MOUNT
2 - BOLT - TRANSAXLE CASE COVER
3 - STRUT - TRANSAXLE TO ENGINE HORIZONTAL
4 - BOLT - HORIZONTAL STRUT
5 - BOLT - STRUT TO TRANSAXLE
6 - COVER - TRANSAXLE CASE LOWER
7 - STRUT - TRANSAXLE TO ENGINE
8 - BOLT - STRUT TO ENGINE
9 - BOLT - ENGINE REAR MOUNT BRACKET
Fig. 101 OIL PAN
1 - GASKET
2 - BOLT
3 - OIL PAN
4 - NUT
9 - 140
ENGINE 3.3/3.8L
RS
(7) Lower vehicle and install oil dipstick.
(8) Connect negative cable to battery.
(9) Fill crankcase with oil to proper level.
OIL PRESSURE RELIEF VALVE
REMOVAL
(1) Remove oil pan (Refer to 9 - ENGINE/LUBRI-
CATION/OIL PAN - REMOVAL).
(2) Drill a 3.175 mm (1/8 in.) hole in the center of
the retainer cap (Fig. 103). Insert a self-threading
sheet metal screw into the cap.
(3) Using suitable pliers, remove cap and discard.
(4) Remove spring and relief valve (Fig. 103).
INSTALLATION
(1) Clean relief valve, spring and bore.
NOTE: Lubricate relief valve with clean engine oil
before installing.
(2) Install relief valve and spring into housing.
(3) Install new retainer cap until flush with seal-
ing surface.
(4) Install oil pan (Refer to 9 - ENGINE/LUBRI-
CATION/OIL PAN - INSTALLATION).
(5) Fill crankcase with proper oil to correct level.
OIL PRESSURE SWITCH
DESCRIPTION
The engine oil pressure switch is located on the
lower left front side of the engine. It screws into the
oil filter adapter. The normally closed switch provides
an input through a single wire to the low pressure
indicator light on the instrument cluster.
OPERATION
The oil pressure switch provides a ground for the
instrument cluster low oil pressure indicator light.
The switch receives oil pressure input from the
engine main oil gallery. When engine oil pressure is
greater than 27.5 Kpa (4 psi), the switch contacts
open, providing a open circuit to the low pressure
indicator light. For wiring circuits and diagnostic
information, (Refer to Appropriate Wiring/Diagnostic
Information).
REMOVAL
(1) Raise vehicle on hoist.
(2) Disconnect electrical connector from switch.
(3) Remove oil pressure switch (Fig. 104).
INSTALLATION
(1) Install oil pressure switch. Torque oil pressure
switch to 23 N·m (200 in. lbs.) (Fig. 104).
(2) Connect electrical connector to switch.
(3) Lower the vehicle.
(4) Start engine and check for leaks.
(5) Check engine oil level. Adjust as necessary.
Fig. 102 Oil Pan Sealing
1 - SEALER LOCATIONS
Fig. 103 Oil Pressure Relief Valve
1 - RELIEF VALVE
2 - SPRING
3 - RETAINER CAP
RS
ENGINE 3.3/3.8L
9 - 141
OIL PAN (Continued)
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