2005 CHRYSLER CARAVAN oil pressure

²Drill motor with 3M RolocŸ Bristle Disc (white
or yellow) (Fig. 3)
CAUTION: Excessive pressure or high RPM (beyond
the recommended speed), can damage the sealing
surfaces. The mild (white, 120 grit) bristle disc is
recommended. If necessary, the medium (yellow, 80
grit) bristle disc may be used on cast iron surfaces
with care.
STANDARD PROCEDURE - MEASURING
BEARING CLEARANCE USING PLASTIGAGE
Engine crankshaft bearing clearances can be deter-
mined by use of Plastigage or equivalent. The follow-
ing is the recommended procedure for the use of
Plastigage:
(1) Remove oil film from surface to be checked.
Plastigage is soluble in oil.
(2) Place a piece of Plastigage across the entire
width of the bearing shell in the cap approximately
6.35 mm (1/4 in.) off center and away from the oil
holes (Fig. 4). (In addition, suspected areas can be
checked by placing the Plastigage in the suspected
area). Torque the bearing cap/bed plate bolts of the
bearing being checked to the proper specifications.
(3) Remove the bearing cap and compare the
width of the flattened Plastigage with the metric
scale provided on the package. Locate the band clos-
est to the same width. This band shows the amount
of clearance in thousandths of a millimeter. Differ-
ences in readings between the ends indicate the
amount of taper present. Record all readings taken.
Compare the clearance measurements to specsifica-
tions found in the engine specifications table(Refer to9 - ENGINE - SPECIFICATIONS).Plastigage gen-
erally is accompanied by two scales. One scale
is in inches, the other is a metric scale.
NOTE: Plastigage is available in a variety of clear-
ance ranges. Use the most appropriate range for
the specifications you are checking.
(4) Install the proper crankshaft bearings to
achieve the specified bearing clearances.
REMOVAL - ENGINE ASSEMBLY
(1) Perform fuel pressure release procedure (Refer
to 14 - FUEL SYSTEM/FUEL DELIVERY - STAN-
DARD PROCEDURE)
(2) Disconnect battery negative cable.
(3) Remove air cleaner housing and inlet tube.
(4) Disconnect the fuel line from fuel rail. (Refer to
14 - FUEL SYSTEM/FUEL DELIVERY/FUEL LINES
- STANDARD PROCEDURE)
(5) Disconnect all vacuum hoses.
(6) Drain cooling system. (Refer to 7 - COOLING -
STANDARD PROCEDURE)
(7) Remove radiator fans. (Refer to 7 - COOLING/
ENGINE/RADIATOR FAN - REMOVAL)
(8) Remove radiator upper and lower hoses.
NOTE: When the transaxle cooler lines are removed
from the rolled-groove type fittings at the transaxle,
damage to the inner wall of the hose will occur. To
prevent prevent potential leakage, the cooler hoses
must be cut off flush at the transaxle fitting, and a
service cooler hose splice kit must be installed
upon reassembly.
Fig. 3 Proper Tool Usage For Surface Preparation
1 - ABRASIVE PAD
2 - 3M ROLOCŸ BRISTLE DISC
3 - PLASTIC/WOOD SCRAPER
Fig. 4 Plastigage Placed in Lower ShellÐTypical
1 - PLASTIGAGE
9 - 12 ENGINE 2.4LRS
ENGINE 2.4L (Continued)

(21) Disconnect exhaust pipe from manifold (Fig.
7).
(22) Remove engine front mount and bracket from
engine. (Refer to 9 - ENGINE/ENGINE MOUNTING/
FRONT MOUNT - REMOVAL)
(23) Remove structural collar. (Refer to 9 -
ENGINE/ENGINE BLOCK/STRUCTURAL COVER -
REMOVAL)
(24) Remove rear engine mount bracket. (Refer to
9 - ENGINE/ENGINE MOUNTING/REAR MOUNT -
REMOVAL)
(25) Mark flex plate to torque converter and
remove torque converter bolts.
(26) Pinch-off power steering supply hose at pump.
Remove hose from pump.
(27) Remove and set aside the power steering
pump and bracket. Do not disconnect pressure line.
(28) Lower vehicle.
(29) Remove A/C lines at compressor and cap open-
ings.
(30) Remove engine ground straps (strap at engine
right mount and at starter).
(31) Raise vehicle enough to allow engine dolly
Special Tool 6135, cradle Special Tool 6710 with
Posts Special Tool 6848 to be installed under vehicle
(Fig. 8).
(32) Loosen cradle posts to allow movement for
proper positioning. Locate two rear posts (right side
of engine) into the holes on the engine bedplate.
Locate the two front posts (left side of engine) on the
oil pan rails (Fig. 8). Lower vehicle and position cra-
dle mounts until the engine is resting on mounts.Tighten mounts to cradle frame. This will keep
mounts from moving when removing or installing
engine and transmission.
(33) Install safety straps around the engine to cra-
dle. Tighten straps and lock.
(34) Lower vehicle so the weight ofONLY THE
ENGINE AND TRANSMISSIONare on the cradle.
(35) Remove engine and transmission mount bolts.
(36) Raise vehicle slowly. It may be necessary to
move the engine/transmission assembly with the
dolly to allow for removal around the body.
INSTALLATION - ENGINE ASSEMBLY
(1) Position engine and transmission assembly
under vehicle and slowly lower the vehicle over the
engine and transmission.
(2) Align engine and transmission mounts to
attaching points. Install mounting bolts at the right
(Fig. 9) and left mounts (Fig. 10).
(3) Remove safety straps.
(4) Slowly raise vehicle enough to remove the
engine dolly and cradle Special Tools 6135 and 6710.
(5) Install rear mount bracket and rear mount
through bolt. (Refer to 9 - ENGINE/ENGINE
MOUNTING/REAR MOUNT - INSTALLATION)
(6) Install the flex plate to torque converter bolts.
(7) Install structural collar. (Refer to 9 - ENGINE/
ENGINE BLOCK/STRUCTURAL COVER - INSTAL-
LATION)
(8) Install front mount bracket and front mount
through bolt. (Refer to 9 - ENGINE/ENGINE
MOUNTING/FRONT MOUNT - INSTALLATION)
(9) Connect exhaust system to manifold (Fig. 7).
(10) Install crossmember cradle plate (Fig. 6).
(11) Install new oil filter.
(12) Install power steering pump and bracket.
(13) Connect power steering supply line to pump
and remove pinch-off pliers.
(14) Connect A/C compressor hoses to compressor.
(15) Install accessory drive belts. (Refer to 7 -
COOLING/ACCESSORY DRIVE/DRIVE BELTS -
INSTALLATION)
(16) Install axle shafts. (Refer to 3 - DIFFEREN-
TIAL & DRIVELINE/HALF SHAFT - INSTALLA-
TION)
(17) Install accessory drive belt splash shield.
(18) Install front wheels and tires.
(19) Remove plugs from transmission cooler hoses
and install transaxle oil cooler line service splice kit.
Refer to instructions included with kit.
(20) Connect the transaxle shift linkage and elec-
trical connectors.
(21) Connect heater hoses (Fig. 5).
(22) Install ground straps.
(23) Connect all engine and throttle body electrical
connections.
Fig. 7 Catalytic Converter to Exhaust Manifold
1 - CATALYTIC CONVERTER
2 - BOLT
3 - GASKET
4 - FLAG NUT
9 - 14 ENGINE 2.4LRS
ENGINE 2.4L (Continued)

(24) Connect all vacuum lines.
(25) Connect the throttle cables.
(26) Connect the fuel line. (Refer to 14 - FUEL
SYSTEM/FUEL DELIVERY/QUICK CONNECT FIT-
TING - STANDARD PROCEDURE)
(27) Connect radiator lower and upper hoses.
(28) Install radiator fans. (Refer to 7 - COOLING/
ENGINE/RADIATOR FAN - INSTALLATION)
(29) Fill cooling system. (Refer to 7 - COOLING -
STANDARD PROCEDURE)
(30) Connect battery cables.
(31) Install air cleaner and inlet hose.
(32) Fill engine crankcase with proper oil to cor-
rect level.
(33) Start engine and run until operating temper-
ature is reached.
(34) Adjust transmission linkage, if necessary.
SPECIFICATIONS
SPECIFICATIONS - 2.4L ENGINE
GENERAL SPECIFICATIONS
DESCRIPTION SPECIFICATION
Type In-Line OHV, DOHC
Number of
Cylinders4
Firing Order 1-3-4-2
Compression
Ratio9.5:1
Max. Variation
Between
Cylinders25%
Metric Standard
Displacement 2.4 Liters 148 cu. in.
Bore 87.5 mm 3.445 in.
Stroke 101.0 mm 3.976 in.
Compression
Pressure1172-1551 kPa 170-225 psi
CYLINDER BLOCK
DESCRIPTION SPECIFICATIONS
Metric Standard
Cylinder Bore
Diameter87.4924 -
87.5076 mm3.4446 - 3.4452
in.
Out-of-Round
(Max.)0.051 mm 0.002 in.
Taper (Max.) 0.051 mm 0.002 in.
Fig. 9 RIGHT MOUNT TO RAIL AND ENGINE
1 - BOLT - MOUNT TO RAIL 68 N´m (50 ft. lbs.)
2 - BOLT - MOUNT TO ENGINE 54 N´m (40 ft. lbs.)
3 - BOLT - MOUNT TO RAIL (HORIZONTAL) 68 N´m (50 ft. lbs.)
4 - RIGHT ENGINE MOUNT
5 - RIGHT FRAME RAIL
Fig. 10 LEFT MOUNT TO FRAME BRACKET
1 - FRAME BRACKET
2 - FRAME RAIL - LEFT
3 - BOLT
4 - TRANSAXLE MOUNT
9 - 16 ENGINE 2.4LRS
ENGINE 2.4L (Continued)

VALVE SPRINGS
DESCRIPTION SPECIFICATION
Metric Standard
Free Length
(Approx.)48.4 mm 1.905 in.
Nominal Force
(Valve Closed)338 N @ 38.0
mm75.98 lbs. @
1.496 in.
Nominal Force
(Valve Open)607 N @ 29.75
mm136 lbs. @
1.172 in.
Installed Height 38.00 mm 1.496 in.
Number of Coils 7.82
Wire Diameter 3.86 mm 1.496 in
OIL PUMP
DESCRIPTION SPECIFICATION
Metric Standard
Clearance Over
Rotors (Max.)0.10 mm 0.004 in.
Cover
Out-of-Flat
(Max.)0.025 mm 0.001 in.
Inner Rotor
Thickness (Min.)9.40 mm 0.370 in.
Outer Rotor
Thickness (Min.)9.40 mm 0.370 in.
Outer Rotor
Clearance
(Max.)0.039 mm 0.015 in.
Outer Rotor
Diameter (Min.)79.95 mm 3.148 in.
Tip Clearance
Between Rotors
(Max.)0.20 mm 0.008 in.
OIL PRESSURE
DESCRIPTION SPECIFICATION
Metric Standard
At Curb Idle
Speed*25 kPa 4 psi
At 3000 rpm 170 - 550 kPa 25 - 80 psi
CAUTION:
*If pressure is ZERO at curb idle, DO NOT run engine
at 3000 rpm.
SPECIFICATIONS - TORQUE
DESCRIPTION N´m Ft.
Lbs.In.
Lbs.
Balance Shaft Carrier to
BlockÐBolts54 40 Ð
Balance Shaft Gear
CoverÐDouble Ended
Fastener12 Ð 105
Balance Shaft SprocketÐ
Bolt28 Ð 250
Balance Shaft Chain
TensionerÐBolts12 Ð 105
Balance Shaft Carrier
CoverÐBolts12 Ð 105
Camshaft SprocketÐBolt 101 75 Ð
Connecting Rod
CapÐBolts27 +
1¤4
turn20
+1¤4
turnÐ
Crankshaft Main Bearing
Cap/Bedplate
ÐM8 Bolts 28 250
ÐM11 Bolts 41 +
1¤4
Turn30
+1¤4
TurnÐ
Crankshaft Damper 136 100 Ð
Cylinder HeadÐBolts (Refer to 9 - ENGINE/
CYLINDER HEAD -
INSTALLATION)
Cylinder Head CoverÐ
Bolts12 Ð 105
Flex Plate to Crankshaft 95 70 Ð
Engine Mount Bracket
RightÐBolts61 45 Ð
Engine MountingÐBolts (Refer to 9 ENGINE/
ENGINE MOUNTING)
Exhaust Manifold to
Cylinder HeadÐBolts19 Ð 170
Exhaust Manifold Heat
ShieldÐBolts12 Ð 105
Intake Manifold - Lower
ÐBolts28 Ð 250
Intake Manifold -
UpperÐBolts28 Ð 250
Oil Filter 12 Ð 105
Oil PanÐBolts 12 Ð 105
Oil Pan DrainÐPlug 28 20 Ð
Oil Pressure Switch 21 Ð 190
9 - 20 ENGINE 2.4LRS
ENGINE 2.4L (Continued)

Crankshaft Sprocket Remover Insert C-4685-C2
Front Crankshaft Oil Seal Remover 6771
Front Crankshaft Oil Seal Installer 6780
Oil Pressure Gauge C-3292
Adapter 8406
Rear Crankshaft Oil Seal Installer 6926
Driver Handle C-4171
Balance Shaft Sprocket Installer 6052
RSENGINE 2.4L9-23
ENGINE 2.4L (Continued)

CYLINDER-TO-CYLINDER LEAKAGE TEST
To determine if an engine cylinder head gasket is
leaking between adjacent cylinders, follow the proce-
dures in Cylinder Compression Pressure Test (Refer
to 9 - ENGINE - DIAGNOSIS AND TESTING). An
engine cylinder head gasket leaking between adja-
cent cylinders will result in approximately a 50±70%
reduction in compression pressure.
CYLINDER-TO-WATER JACKET LEAKAGE TEST
WARNING: USE EXTREME CAUTION WHEN THE
ENGINE IS OPERATING WITH COOLANT PRES-
SURE CAP REMOVED.
VISUAL TEST METHOD
With the engine cool, remove the coolant pressure
cap. Start the engine and allow it to warm up until
thermostat opens.
If a large combustion/compression pressure leak
exists, bubbles will be visible in the coolant.
COOLING SYSTEM TESTER METHOD
WARNING: WITH COOLING SYSTEM TESTER IN
PLACE, PRESSURE WILL BUILD UP FAST. EXCES-
SIVE PRESSURE BUILT UP, BY CONTINUOUS
ENGINE OPERATION, MUST BE RELEASED TO A
SAFE PRESSURE POINT. NEVER PERMIT PRES-
SURE TO EXCEED 138 kPa (20 psi).
Install Cooling System Tester 7700 or equivalent to
pressure cap neck. Start the engine and observe the
tester's pressure gauge. If gauge pulsates with every
power stroke of a cylinder a combustion pressure
leak is evident.
CHEMICAL TEST METHOD
Combustion leaks into the cooling system can also
be checked by using Bloc-Chek Kit C-3685-A or
equivalent. Perform test following the procedures
supplied with the tool kit.
REMOVAL - CYLINDER HEAD
(1) Perform fuel system pressure release procedure
before attempting any repairs.(Refer to 14 -
FUEL SYSTEM/FUEL DELIVERY - SPECIFICA-
TIONS)
(2) Disconnect battery negative cable.
(3) Drain cooling system. (Refer to 7 - COOLING -
STANDARD PROCEDURE)
(4) Remove air filter housing and inlet tube.
(5) Remove upper intake manifold. (Refer to 9 -
ENGINE/MANIFOLDS/INTAKE MANIFOLD -
REMOVAL)(6) Remove heater tube support bracket from cyl-
inder head.
(7) Disconnect radiator upper and heater supply
hoses from intake manifold water outlet connections.
(8) Remove accessory drive belts. (Refer to 7 -
COOLING/ACCESSORY DRIVE/DRIVE BELTS -
REMOVAL)
(9) Raise vehicle and remove exhaust pipe from
manifold.
(10) Remove power steering pump reservoir and
line support bracket from lower intake manifold and
set aside. Do not disconnect lines.
(11) Remove ignition coil and wires from engine.
(12) Disconnect cam sensor and fuel injector wir-
ing connectors.
(13) Remove timing belt and camshaft sprockets.
(Refer to 9 - ENGINE/VALVE TIMING/TIMING
BELT/CHAIN AND SPROCKETS - REMOVAL)
(14) Remove timing belt idler pulley and rear tim-
ing belt cover. (Refer to 9 - ENGINE/VALVE TIM-
ING/TIMING BELT / CHAIN COVER(S) -
REMOVAL)
(15) Remove cylinder head cover. (Refer to 9 -
ENGINE/CYLINDER HEAD/CYLINDER HEAD
COVER(S) - REMOVAL)
(16) Remove camshafts (Refer to 9 - ENGINE/
CYLINDER HEAD/CAMSHAFT(S) - REMOVAL).
NOTE: Identify rocker arm position to ensure cor-
rect re-installation in original position, if reused.
(17) Remove rocker arms. (Refer to 9 - ENGINE/
CYLINDER HEAD/ROCKER ARMS - REMOVAL)
(18) Remove cylinder head bolts in REVERSE
sequence of tightening (Fig. 19).
(19) Remove cylinder head from engine block.
(20) Inspect and clean cylinder head. (Refer to 9 -
ENGINE/CYLINDER HEAD - INSPECTION) (Refer
to 9 - ENGINE/CYLINDER HEAD - CLEANING)
CLEANING
To ensure engine gasket sealing, proper surface
preparation must be performed, especially with the
use of aluminum engine components and multi-layer
steel cylinder head gaskets.
NOTE: Multi-Layer Steel (MLS) head gaskets require
a scratch free sealing surface.
Remove all gasket material from cylinder head and
block (Refer to 9 - ENGINE - STANDARD PROCE-
DURE). Be careful not to gouge or scratch the alumi-
num head sealing surface.
Clean all engine oil passages.
9 - 26 ENGINE 2.4LRS
CYLINDER HEAD (Continued)

INTAKE/EXHAUST VALVES &
SEATS
DESCRIPTION
The valves are made of heat resistant steel. They
have chrome plated stems to prevent scuffing. Viton
rubber valve stem seals are integral with the spring
seats. The valves have three-bead lock keepers to
retain springs and to promote valve rotation.
CLEANING
(1) Clean all valves thoroughly and discard
burned, warped and cracked valves.
VALVE SPRINGS & SEALS
REMOVAL
REMOVAL - CYLINDER HEAD ON
(1) Remove cylinder head cover (Refer to 9 -
ENGINE/CYLINDER HEAD/CYLINDER HEAD
COVER(S) - REMOVAL).
(2) Remove camshafts (Refer to 9 - ENGINE/CYL-
INDER HEAD/CAMSHAFT(S) - REMOVAL).
(3) Rotate crankshaft until piston is at TDC on
compression.
(4) With air hose attached to adapter tool installed
in spark plug hole, apply 90-120 psi air pressure.
(5) Using Special Tool MD-998772-A with adapter
6779 (Fig. 33), compress valve springs and remove
valve locks.
(6) Remove valve spring(s).
(7) Remove valve stem seal(s) by a using valve
stem seal tool (Fig. 35).
REMOVAL - CYLINDER HEAD OFF
(1) With cylinder head removed from cylinder
block, compress valve springs using a universal valve
spring compressor.
(2) Remove valve retaining locks, valve spring
retainers, valve stem seals and valve springs.
(3) Before removing valves,remove any burrs
from valve stem lock grooves to prevent dam-
age to the valve guides.Identify valves, locks and
retainers to insure installation in original location.
(4) Inspect the valves. (Refer to 9 - ENGINE/CYL-
INDER HEAD/VALVE SPRINGS - INSPECTION)
INSPECTION
(1) Whenever valves have been removed for inspec-
tion, reconditioning or replacement, valve springs
should be tested for correct tension. Discard the
springs that do not meet specifications. The following
specifications apply to both intake and exhaust
valves springs:
²Valve Closed Nominal TensionÐ76 lbs. @ 38.0
mm (1.50 in.)
²Valve Open Nominal TensionÐ136 lbs. @ 29.75
mm (1.17 in.)
(2) Inspect each valve spring for squareness with a
steel square and surface plate, test springs from both
ends. If the spring is more than 1.5 mm (1/16 inch)
out of square, install a new spring.
INSTALLATION
INSTALLATION - CYLINDER HEAD ON
(1) Install valve seal/valve spring seat assembly
(Fig. 34). Push the assembly down to seat it onto the
valve guide.
(2) Install valve spring and retainer, use Special
Tool MD-998772-A with adapter 6779 to compress
valve springs only enough to install locks (Fig. 33).
Correct alignment of tool is necessary to avoid nick-
ing valve stems.
(3) Remove air hose and install spark plugs.
(4) Install camshafts (Refer to 9 - ENGINE/CYL-
INDER HEAD/CAMSHAFT(S) - INSTALLATION).
(5) Install cylinder head cover (Refer to 9 -
ENGINE/CYLINDER HEAD/CYLINDER HEAD
COVER - INSTALLATION).
INSTALLATION - CYLINDER HEAD OFF
(1) Coat valve stems with clean engine oil and
insert in cylinder head.
(2) Install new valve stem seals on all valves
using a valve stem seal tool (Fig. 35). The valve stem
seals should be pushed firmly and squarely over
valve guide.
Fig. 33 Valve Spring - Removal/Installation
1 - VALVE SPRING COMPRESSOR MD 998772A
2 - AIR HOSE
RSENGINE 2.4L9-33

CAUTION: When oversize valves are used, the cor-
responding oversize valve seal must also be used.
Excessive guide wear may result if oversize seals
are not used with oversize valves.
(3) Install valve springs and retainers. Compress
valve springs only enough to install locks, taking
care not to misalign the direction of compression.
Nicked valve stems may result from misalignment of
the valve spring compressor.
CAUTION: When depressing the valve spring retain-
ers with valve spring compressor the locks can
become dislocated. Ensure both locks are in the
correct location after removing tool.
(4) Check the valve spring installed height B after
refacing the valve and seat (Fig. 36). Make sure mea-
surements are taken from top of spring seat to thebottom surface of spring retainer. If height is greater
than 38.75 mm (1.525 in.), install a 0.762 mm (0.030
in.) spacer under the valve spring seat to bring
spring height back within specification.HYDRAULIC LASH
ADJUSTERS
DIAGNOSIS AND TESTING - HYDRAULIC LASH
ADJUSTER NOISE DIAGNOSIS
A tappet-like noise may be produced from several
items. Check the following items.
(1) Engine oil level too high or too low. This may
cause aerated oil to enter the adjusters and cause
them to be spongy.
(2) Insufficient running time after rebuilding cylin-
der head. Low speed running up to 1 hour may be
required.
(3) During this time, turn engine off and let set for
a few minutes before restarting. Repeat this several
times after engine has reached normal operating
temperature.
(4) Low oil pressure.
(5) The oil restrictor (integral to the head gasket)
in the vertical oil passage to the cylinder head is
plugged with debris.
(6) Air ingested into oil due to broken or cracked
oil pump pick up.
(7) Worn valve guides.
(8) Rocker arm ears contacting valve spring
retainer.
(9) Rocker arm loose, adjuster stuck or at maxi-
mum extension and still leaves lash in the system.
(10) Faulty lash adjuster.
²Check lash adjusters for sponginess while
installed in cylinder head. Depress part of rocker
arm over adjuster. Normal adjusters should feel very
firm. Spongy adjusters can be bottomed out easily.
Fig. 34 Valve Stem Seal/Valve Spring Seat
1 - VALVE RETAINING LOCKS
2 - VALVE SPRING
3 - VALVE SEAL AND VALVE SPRING SEAT ASSEMBLY
4 - VALVE SPRING RETAINER
Fig. 35 Valve Stem Oil Seal Tool
1 - VALVE SEAL TOOL
2 - VALVE STEM
Fig. 36 Checking Spring Installed Height and Valve
Tip Height Dimensions
1 - GARTER SPRING
2 - VALVE SPRING SEAT
3 - CYLINDER HEAD SURFACE
9 - 34 ENGINE 2.4LRS
VALVE SPRINGS & SEALS (Continued)