2004 CHRYSLER VOYAGER seats

(2) Install sprocket using Special Tool 8452 (Fig.
142). Install sprocket until it is fully seats on the
crankshaft.(3) Install the timing chain and camshaft sprocket.
(Refer to 9 - ENGINE/VALVE TIMING/TIMING
BELT/CHAIN AND SPROCKETS - INSTALLATION)
INSTALLATION - TIMING CHAIN AND
CAMSHAFT SPROCKET
(1) Rotate crankshaft so the timing arrow is to the
12 o'clock position (Fig. 140).
NOTE: Lubricate timing chain and sprockets with
clean engine oil before installation.
(2) While holding camshaft sprocket and chain in
hand, place timing chain around the sprocket, align-
ing the plated link with the dot on the sprocket. Posi-
tion the timing arrow to the 6 o'clock position (Fig.
140).
(3) Place timing chain around crankshaft sprocket
with the plated link lined up with the dot on the
sprocket. Install camshaft sprocket into position.
(4) Use a straight edge to check alignment of tim-
ing marks.
(5) Install camshaft sprocket bolt and washer.
Tighten bolt to 54 N´m (40 ft. lbs.).
(6) Rotate crankshaft 2 revolutions and check tim-
ing mark alignment (Fig. 140). If timing marks do
not line up, remove camshaft sprocket and realign.
(7) Install the timing chain cover. (Refer to 9 -
ENGINE/VALVE TIMING/TIMING BELT / CHAIN
COVER(S) - INSTALLATION)
(8) Connect negative cable to battery.
Fig. 140 Timing Mark Alignment
1 - CAMSHAFT SPROCKET TIMING MARK (DOT)
2 - PLATED LINK
3 - CRANKSHAFT SPROCKET TIMING MARK (DOT)
4 - ARROWS
Fig. 141 CRANKSHAFT SPROCKET - REMOVAL
1 - SPECIAL TOOL 5048-6
2 - SPECIAL TOOL 5048-1
3 - SPECIAL TOOL 8450
4 - CRANKSHAFT SPROCKET
5 - SPECIAL TOOL 8539
Fig. 142 CRANKSHAFT SPROCKET - INSTALLATION
1 - SPECIAL TOOL 8452-3
2 - SPECIAL TOOL 8452-1
3 - CRANKSHAFT SPROCKET
4 - THRUST BEARING / WASHER
RSENGINE 3.3/3.8L9 - 157
TIMING CHAIN AND SPROCKETS (Continued)

ENGINE 3.3/3.8L SUPPLEMENT
TABLE OF CONTENTS
page page
ENGINE 3.3/3.8L SUPPLEMENT
SPECIFICATIONS
3.3/3.8L ENGINE......................11
CYLINDER HEAD
DESCRIPTION.........................16
DIAGNOSIS AND TESTINGÐCYLINDER HEAD
GASKET............................16
REMOVAL - CYLINDER HEAD.............17
CLEANING............................17
INSPECTION..........................17
INSTALLATION - CYLINDER HEAD..........18
CYLINDER HEAD COVER(S)
DESCRIPTION.........................19
CYLINDER HEAD COVER-RIGHT
REMOVAL.............................19
INSTALLATION.........................19
CYLINDER HEAD COVER-LEFT
REMOVAL.............................20
INSTALLATION.........................20
INTAKE/EXHAUST VALVES & SEATS
DESCRIPTION.........................21
OPERATION...........................21
STANDARD PROCEDURE - REFACING
VALVESANDVALVESEATS .............21
REMOVAL.............................22
CLEANING............................22
INSPECTION..........................22
INSTALLATION.........................23VALVE SPRINGS
DESCRIPTION.........................23
OPERATION...........................23
REMOVAL
REMOVAL - CYLINDER HEAD OFF........24
REMOVAL - CYLINDER HEAD ON.........24
INSPECTION..........................25
INSTALLATION
INSTALLATION - CYLINDER HEAD OFF....26
INSTALLATION - CYLINDER HEAD ON.....26
ROCKER ARMS
DESCRIPTION
DESCRIPTION - ROCKER ARMS.........26
DESCRIPTION - PUSHRODS............26
OPERATION
OPERATION - ROCKER ARMS...........26
OPERATION - PUSHRODS..............26
REMOVAL - ROCKER ARMS AND SHAFT.....27
DISASSEMBLY - ROCKER ARMS
AND SHAFT..........................27
ASSEMBLY - ROCKER ARMS AND SHAFT....27
INSTALLATION - ROCKER ARMS
AND SHAFT..........................28
VALVE STEM SEALS
DESCRIPTION.........................29
REMOVAL.............................29
INSTALLATION.........................29
9s - 10 ENGINE 3.3/3.8L SUPPLEMENTRS

CYLINDER HEAD
DESCRIPTION
The aluminum cylinder heads (Fig. 1) are designed
to create high flow combustion chambers to improve
performance, while minimizing the change to the
burn rate in the chamber. The cylinder head incorpo-
rates the combustion chamber. Two valves per-cylin-
der are used with inserted valve seats and guides. A
multi-layer steel (MLS) type gasket is used between
the cylinder head and engine block.
DIAGNOSIS AND TESTINGÐCYLINDER HEAD
GASKET
A cylinder head gasket leak can be located between
adjacent cylinders or between a cylinder and the
adjacent water jacket.
Possible indications of the cylinder head gasket
leaking between adjacent cylinders are:
²Loss of engine power
²Engine misfiring²Poor fuel economy
Possible indications of the cylinder head gasket
leaking between a cylinder and an adjacent water
jacket are:
²Engine overheating
²Loss of coolant
²Excessive steam (white smoke) emitting from
exhaust
²Coolant foaming
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.
Fig. 1 Cylinder Head and Components
1 - VALVE LOCKS 5 - SPRING SEATS
2 - RETAINERS 6 - CYLINDER HEAD
3 - VALVE SPRINGS 7 - VALVE - EXHAUST
4 - VALVE STEM SEALS 8 - VALVE - INTAKE
9s - 16 ENGINE 3.3/3.8L SUPPLEMENTRS

INTAKE/EXHAUST VALVES &
SEATS
DESCRIPTION
The valves have chrome plated valve stems with
four-bead lock grooves. The valve stem seals are
made of Viton rubber.
OPERATION
The two valves per cylinder are opened using
hydraulic lifters, push rods, and rocker arms.
STANDARD PROCEDURE - REFACING VALVES
AND VALVE SEATS
The intake and exhaust valves and seats are
machined to specific angles (Fig. 11).
VALVES
(1) Inspect the remaining margin after the valves
are refaced (Fig. 12). (Refer to 9 - ENGINE - SPEC-
IFICATIONS)
VALVE SEATS
CAUTION: Remove metal from valve seat only. Do
not remove material from cylinder head (Fig. 13).
(1) When refacing valve seats, it is important that
the correct size valve guide pilot be used for reseat-
ing stones. A true and complete surface must be
obtained.
Fig. 11 VALVE FACE AND SEAT
1 - VALVE FACE WIDTH
2 - VALVE FACE ANGLE
3 - SEAT ANGLE
4 - SEAT CONTACT AREA
Fig. 12 Valve Margin
1 - VALVE FACE
2 - VALVE MARGIN
Fig. 13 Refacing Valve Seats
1 - REFACING STONE MUST NOT CUT INTO CYLINDER HEAD
2-STONE
3 - PILOT
4 - SEAT
RSENGINE 3.3/3.8L SUPPLEMENT9s-21

(2) Measure the concentricity of valve seat using
dial indicator (Fig. 14). Total runout should not
exceed 0.051 mm (0.002 in.) total indicator reading.
(3) Inspect the valve seat using Prussian blue to
determine where the valve contacts the seat. To do
this, coat valve seatLIGHTLYwith Prussian blue
then set valve in place. Rotate the valve with light
pressure. If the blue is transferred to the center of
valve face, contact is satisfactory. If the blue is trans-
ferred to top edge of valve face, lower valve seat with
a 15 degree stone. If the blue is transferred to the
bottom edge of valve face raise valve seat with a 65
degrees stone.
NOTE: Valve seats which are worn or burned can
be reworked, provided that correct angle and seat
width are maintained. Otherwise cylinder head must
be replaced.
(4) When seat is properly positioned the width of
intake and exhaust seats should be 1.50±2.00 mm
(0.059±0.078 in.) (Fig. 11).
(5) After grinding the valve seats or faces, install
the valve in cylinder head and check valve installed
height by measuring from valve tip to spring seat
(Fig. 15). Remove valve from cylinder head and grind
valve tip until within specifications. Check valve tip
for scoring. The tip chamfer should be reground (if
necessary) to prevent seal damage when the valve is
installed.
(6) Check the valve spring installed height after
refacing the valve and seat (Fig. 15).
If valves and/or seats are reground, measure
the installed height of springs (Fig. 15), make
sure measurements are taken from top of
spring seat to the bottom surface of spring
retainer. If height is greater than specifica-tions, install a 0.794 mm (0.0312 in.) spacer in
head counterbore to bring spring height back
within specifications.
REMOVAL
(1) With cylinder head removed, compress valve
springs using Valve Spring Compressor Tool
C-3422-D with adapter 8464 (Refer to 9 - ENGINE -
SPECIAL TOOLS).
(2) Remove valve retaining locks.
(3) Slowly release valve spring compressor.
Remove valve spring retainer, valve spring, and valve
stem seal.
(4) Before removing valves,remove any burrs
from valve stem lock grooves to prevent dam-
age to the valve guides.Identify valves to insure
installation in original location.
CLEANING
(1) Clean all valves thoroughly and discard
burned, warped and cracked valves.
INSPECTION
VALVES
(1) Clean and inspect valves thoroughly. Replace
burned, warped and cracked valves.
(2) Measure valve stems for wear (Fig. 16). For
valve specifications, (Refer to 9 - ENGINE - SPECI-
FICATIONS).
NOTE: Valve stems are chrome plated and should
not be polished (Fig. 16).
Fig. 14 Measurement of Valve Seat Runout
1 - DIAL INDICATOR
Fig. 15 Checking Valve and Spring Installed Height
1 - SPRING RETAINER
2 - VALVE INSTALLED HEIGHT* - 48.1±49.7 mm (1.89±1.95 in.)
3 - CYINDER HEAD SURFACE
4 - SPRING INSTALLED HEIGHT* - 41.1±42.7 mm (1.61±1.68 in.)
*(MEASURED FROM TOP OF SPRING SEAT)
9s - 22 ENGINE 3.3/3.8L SUPPLEMENTRS
INTAKE/EXHAUST VALVES & SEATS (Continued)

VALVE GUIDES
(1) Remove carbon and varnish deposits from
inside of valve guides with a reliable guide cleaner.
(2) Measure valve stem-to-guide clearance as fol-
lows:
(3) Install valve into cylinder head so it is 15 mm
(0.590 inch.) off the valve seat. A small piece of hose
may be used to hold valve in place.
(4) Attach dial indicator Tool C-3339 to cylinder
head and set it at right angle of valve stem being
measured (Fig. 17).
(5) Move valve to and from the indicator. For cler-
ance specifications, (Refer to 9 - ENGINE - SPECIFI-
CATIONS).
NOTE: Replace cylinder head if stem-to-guide clear-
ance exceeds specifications, or if guide is loose in
cylinder head.
INSTALLATION
(1) Coat valve stems with clean engine oil and
insert them in cylinder head.
(2) Install valve spring seat on head (Fig. 19).
(3) Install new seals on all valve stems and over
valve guides (Fig. 19). Install valve springs and valve
retainers (Fig. 19).
(4) Install the valve springs. (Refer to 9 -
ENGINE/CYLINDER HEAD/VALVE SPRINGS -
INSTALLATION)
VALVE SPRINGS
DESCRIPTION
There are two interchangeable, floating (spring
rotates during operation), valve spring designs. Type
A may be identified by the counterclockwise (spring
spirals down and to the left) appearance, And Type B
may be identified by the clockwise (spring spirals
down and to the right) appearance. Both of the valve
springs are a bee-hive shaped design but have differ-
ent specifications (Fig. 18). The springs are seated on
a steel washer on the cylinder head with retainers
and locks retaining the springs (Fig. 19). The springs
are installed with the smaller diameter against
spring retainer (Fig. 18).
OPERATION
The valve spring returns the valve against its seat
for a positive seal of the combustion chamber.
Fig. 16 Intake and Exhaust Valves
1 - MARGIN
2-FACE
3 - STEM
4 - VALVE SPRING RETAINER LOCK GROOVES
Fig. 17 Measuring Valve Guide Wear - Typical
Fig. 18 Valve Spring - Type A
1 - VALVE SPRING (TOP - SMALLER DIAMETER)
RSENGINE 3.3/3.8L SUPPLEMENT9s-23
INTAKE/EXHAUST VALVES & SEATS (Continued)

REMOVAL
REMOVAL - CYLINDER HEAD OFF
(1) With the cylinder head on a bench, position
Special Tool C-3422-D with 8464 Adapter on the
valve and spring retainer (Fig. 20).
(2) Compress the spring only enough to remove the
valve retainer locks.
(3) Slowly release the spring tension and remove
the valve spring and retainer.
(4) For removal of the valve stem seal (Refer to 9 -
ENGINE/CYLINDER HEAD/VALVE STEM SEALS -
REMOVAL).
REMOVAL - CYLINDER HEAD ON
(1) Disconnect negative cable from battery.
(2) Remove spark plug wires and all spark plugs.
(3) Remove cylinder head cover(s). (Refer to 9 -
ENGINE/CYLINDER HEAD/CYLINDER HEAD
COVER(S) - REMOVAL)
(4) Remove rocker arms and shaft. (Refer to 9 -
ENGINE/CYLINDER HEAD/ROCKER ARMS -
REMOVAL)
(5) Rotate engine until the piston in the cylinder
bore requiring spring removal is at TDC.
(6) Install Special Tool 8453 to the cylinder head
(Fig. 21). Tighten the attaching bolts to 23 N´m (200
in. lbs.).
Fig. 19 VALVE COMPONENTS
1 - VALVE LOCKS 5 - SPRING SEATS
2 - RETAINERS 6 - CYLINDER HEAD
3 - VALVE SPRINGS 7 - VALVE - EXHAUST
4 - VALVE STEM SEALS 8 - VALVE - INTAKE
9s - 24 ENGINE 3.3/3.8L SUPPLEMENTRS
VALVE SPRINGS (Continued)

QUICK CONNECT FITTING
STANDARD PROCEDURE - QUICK-CONNECT
FITTINGS
REMOVAL
When disconnecting a quick-connect fitting, the
retainer will remain on the fuel tube nipple.
WARNING: RELEASE FUEL SYSTEM PRESSURE
BEFORE DISCONNECTING A QUICK-CONNECT FIT-
TINGS. REFER TO THE FUEL PRESSURE RELEASE
PROCEDURE. THIS MAY RESULT IN PERSONAL
INJURY OR DEATH.
(1) Perform Fuel Pressure Release Procedure.
Refer to the Fuel Pressure Release Procedure in this
section.
(2) Disconnect negative cable from battery or aux-
iliary jumper terminal.
(3) Squeeze retainer tabs together and pull fuel
tube/quick-connect fitting assembly off of fuel tube
nipple. The retainer will remain on fuel tube.
INSTALLATION
CAUTION: Make sure that the o-ring in installed in
fitting. Never install a quick-connect fitting without
the retainer being either on the fuel tube or already
in the quick-connect fitting. In either case, ensure
the retainer locks securely into the quick-connect
fitting by firmly push-pulling-push on fuel tube and
fitting to ensure it is secured.
(1) Using a clean lint free cloth, clean the fuel tube
nipple and retainer.
(2) Prior to connecting the fitting to the fuel tube,
coat the fuel tube nipple with clean engine oil.
(3) Push the quick-connect fitting over the fuel
tube until theretainer seats and a click is heard.
(4) The plastic quick-connect fitting has windows
in the sides of the casing. When the fitting com-
pletely attaches to the fuel tube, the retainer locking
ears and the fuel tube shoulder are visible in the
windows. If they are not visible, the retainer was not
properly installed (Fig. 22).Do not rely upon the
audible click to confirm a secure connection.
(5) Connect negative cable to battery or auxiliary
jumper terminal.
CAUTION: When using the ASD Fuel System Test,
the Auto Shutdown (ASD) Relay remains energized
for several minutes, until the test is stopped, or
until the ignition switch is turned to the Off posi-
tion.(6) Use the DRB IIItscan tool ASD Fuel System
Test to pressurize the fuel system. Check for leaks.
TWO-TAB TYPE FITTING
This type of fitting is equipped with tabs located on
both sides of the fitting (Fig. 23). These tabs are sup-
plied for disconnecting the quick-connect fitting from
component being serviced.
CAUTION: The interior components (O-rings, spac-
ers) of this type of quick-connect fitting are not ser-
viced separately, but new plastic retainers are
available. Do not attempt to repair damaged fittings
or fuel lines/tubes. If repair is necessary, replace
the complete fuel tube assembly.
Fig. 22 Plastic Quick-Connect Fitting/Fuel Tube
Connection
1 - WINDOW
2-TAB(2)
3 - EAR
4 - SHOULDER (ON TUBE)
Fig. 23 Typical Two-Tab Type Quick-Connect Fitting
1 - TAB(S)
2 - QUICK-CONNECT FITTING
14 - 14 FUEL DELIVERYRS