seats CHRYSLER VOYAGER 2004 Workshop Manual

CONNECTOR NAME/NUMBER COLOR LOCATION FIG.
Blower Motor Resistor C1 (MTC) BK Right Side of HVAC N/S
Blower Motor Resistor C2 (MTC) BK Right Side of HVAC N/S
Body Control Module C1 BK Under Left Instrument Panel 41, 42
Body Control Module C2 BK/GN Under Left Instrument Panel 41, 42
Body Control Module C3 BK/WT Under Left Instrument Panel 41, 42
Body Control Module C4 BK/GY Under Left Instrument Panel 20, 21, 30
Body Control Module C5 BK Under Left Instrument Panel 20, 21, 30
Boost Pressure Sensor (Diesel) BK Top Left of Engine 15
Brake Fuid Level Switch BK On Master Cylinder 6
Brake Lamp Switch BK At Top Of Brake Pedal 41, 42
Brake Transmission Shift
Interlock Solenoid (EATX)BK Near Steering Column 20, 21, 22, 31
C100 BK Left Fender Shield 5, 11
C101 LTGY Left Fender Shield 5
C102 (Gas) BK At Fuel Rail 11, 17
C103 (Diesel) BK Left Side Engine Compartment N/S
C104 (Except Export LTGY Near Controller Antilock Brake 18
C106 (Export) BK/YL Near Left Headlamp Leveling Motor N/S
C107 (Export) BK/YL Near Right Headlamp Leveling
MotorN/S
C110 (Gas Export) BK Left Front Engine 11
C111 (EATX) LTGY Left Front Engine 11
C112 (Except Export) BK Near T/O for C101 N/S
C200 GY Left Side Instrument Panel 20, 21, 30, 41, 42
C201 YL Left Side Instrument Panel 20, 21, 30, 41, 42
C202 GY Right Side Instrument Panel A/C
Heater Unit20, 24, 29
C204 (Premium NAT/WT Rear of Radio 50
C300 (LHD) BK Left Front Door Lower 36, 43
C300 (RHD) BK Right Front Door Lower N/S
C301 LTGY Left Front Door Upper 36, 43
C302 LTGY Right Front Door Upper 8, 39, 44
C303 (LHD) BK Right Front Door Lower 8, 44
C303 (RHD) BK Left Front Door Lower 39, 44
C304 Left Wire Track Seat to Body 32
C305 GY Wire Track Seat to Body 32 33
C306 (RHD) YL Right Wire Track Seat to Body 33
C307 (Heated Seats) GY Right Wire Track Seat to Body N/S
C308 GN Left Rear Sliding Door 40
C309 GN/GY Right Rear Sliding Door 32, 33, 39
C310 (Front Console) BK At Front Console 34
C311 (3 Zone HVAC) GY Rear A/C Switch 40
C312 GY Right B Pillar 33, 39, 50
8W - 91 - 2 8W-91 CONNECTOR/GROUND/SPLICE LOCATIONRS
CONNECTOR/GROUND/SPLICE LOCATION (Continued)

CONNECTOR NAME/NUMBER COLOR LOCATION FIG.
Ignition Coil (2.4L) BK Top of Valve Cover 10, 11
Ignition Coil (3.3L/ 3.8L) DKGY Top of Engine 17, 18
Ignition Switch BK Rear of Switch at Steering Column 20, 21, 22, 23, 31
Inlet Air Temperature Sensor BK Top Left of Engine 9, 10, 11, 17
Input Speed Sensor GY Front of Transmission 14, 19
Instrument Cluster BK Rear of Cluster 20, 21, 28
Instrument Panel Switch Bank
(Heated Seats)BK Right Center of Instrument Panel 20, 23, 25
Instrument Panel Switch Bank
(Except Heated Seats)Right Center of Instrument Panel 20, 23, 25
Integrated Power Module C1 Left Fender Shield 6, 7
Integrated Power Module C2 GN/BL Left Fender Shield 6, 7
Integrated Power Module C3 Left Fender Shield 6, 7, 11
Integrated Power Module C4 BL Left Fender Shield 6, 7, 11
Integrated Power Module C5 BK Left Fender Shield 6, 7
Integrated Power Module C6 NAT Left Fender Shield 6, 7
Integrated Power Module C7 Left Fender Shield 6, 7
Integrated Power Module C8 OR Left Fender Shield 6, 7
Integrated Power Module C9 BK Left Fender Shield 6, 7
Knock Sensor (2.4L) BK At Engine Block N/S
Knock Sensor (3.3L/3.8L ABS
Except Export)GY Front of Cylinder Block 11
Left B Pillar Switch (Power
Sliding Door)GY Left B Pillar 40
Left Cinch/Release Motor (Power
Sliding Door)GY Left Sliding Door N/S
Left Cylinder Lock Switch BK At Switch 43
Left Door Speaker (Highline) BK/RD At Speaker 43
Left Door Speaker (Lowline) In Door N/S
Left Fog Lamp (Except Export) BK At Lamp N/S
Left Fog Lamp (Export) WT At Lamp 5
Left Front Door Ajar Switch
(Base)BK At Switch N/S
Left Front Door Lock Motor/Ajar
Switch (Except Base)BK Left Door 43
Left Front Impact Sensor (Except
Export)BK Near T/O for C300 N/S
Left Front Park/Turn Signal Lamp
(Except Export)DKGY At Lamp 1
Left Front Wheel Speed Sensor GY Left Fender Side Shield 5, 11
Left Full Open Switch (Power
Sliding Door)BK Left Sliding Door N/S
Left Headlamp (Except Export) BK At Lamp 1
Left Headlamp Leveling Motor
(Export)WT At Motor N/S
8W - 91 - 6 8W-91 CONNECTOR/GROUND/SPLICE LOCATIONRS
CONNECTOR/GROUND/SPLICE LOCATION (Continued)

POWER OUTLET
DESCRIPTION
Accessory power outlets are standard equipment on
this model. Two power outlets are installed in the
instrument panel center lower bezel, which is located
near the bottom of the instrument panel center stack
area. Two additional power outlets are also incorpo-
rated into the vehicle, one on the left rear C-pillar
trim and the other in the center console, if equipped.
The power outlets bases are secured by a snap fit in
the appropriate bezels. A hinged plug flips closed to
conceal and protect the power outlet base when the
power outlet is not being used.
The power outlet receptacle unit and the power
outlet plugs are each available for service replace-
ment.
OPERATION
The power outlet base or receptacle shell is con-
nected to ground, and an insulated contact in the
bottom of the shell is connected to battery current.
The power outlet on the instrument panel marked
with a battery receives battery voltage from a fuse in
the Integrated Power Module (IPM) at all times. The
other power outlet on the instrument panel marked
with a key receives battery voltage only when the
key is in the on position.
The power outlet located in the center console
receives battery voltage all the time when positioned
between thefront seatsand key-on voltage when
positioned between therear seats. The power outlet
located on the C-pillar receives battery voltage only
when the key is in the on position.
DIAGNOSIS AND TESTING
DIAGNOSIS & TESTING - POWER OUTLET
For complete circuit diagrams, refer toCigar
Lighter/Power Outletin Wiring Diagrams.
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS, REFER TO RESTRAINTS BEFORE ATTEMPT-
ING ANY STEERING WHEEL, STEERING COLUMN,
SEAT OR INSTRUMENT PANEL COMPONENT DIAG-
NOSIS OR SERVICE. FAILURE TO TAKE THE
PROPER PRECAUTIONS COULD RESULT IN ACCI-
DENTAL AIRBAG DEPLOYMENT AND POSSIBLE
PERSONAL INJURY.
(1) Check the fused B(+) fuse in the Integrated
Power Module (IPM). If OK, go to Step 2. If not OK,
repair the shorted circuit or component as required
and replace the faulty fuse.
(2) Check for battery voltage at the fused B(+) fuse
in the IPM. If OK, go to Step 3. If not OK, repair the
open fused B(+) circuit to the IPM fuse as required.
(3) Open the power outlet door. Check for continu-
ity between the inside circumference of the power
outlet receptacle and a good ground. There should be
continuity. If OK, go to Step 4. If not OK, go to Step
5.
(4) Check for battery voltage at the insulated con-
tact located at the back of the power outlet recepta-
cle. If not OK, go to Step 5.
(5) Disconnect and isolate the battery negative
cable. Remove the appropriate bezel. Check for conti-
nuity between the ground circuit cavity of the power
outlet wire harness connector and a good ground.
There should be continuity. If OK, go to Step 6. If not
OK, repair the open ground circuit to ground as
required.
(6) Connect the battery negative cable. Check for
battery voltage at the fused B(+) circuit cavity of the
power outlet wire harness connector. If OK, replace
the faulty power outlet receptacle. If not OK, repair
the open fused B(+) circuit to the IPM fuse as
required.
8W - 97 - 4 8W-97 POWER DISTRIBUTION SYSTEMRS

ENGINE
TABLE OF CONTENTS
page page
ENGINE 2.4L.............................. 1ENGINE 3.3/3.8L......................... 74
ENGINE 2.4L
TABLE OF CONTENTS
page page
ENGINE 2.4L
DESCRIPTION..........................3
DIAGNOSIS AND TESTING
DIAGNOSIS AND TESTING - ENGINE
DIAGNOSIS - INTRODUCTION............3
DIAGNOSIS AND TESTING - ENGINE
DIAGNOSIS - PERFORMANCE............4
DIAGNOSIS AND TESTING - ENGINE
DIAGNOSIS - MECHANICAL..............6
DIAGNOSIS AND TESTING - ENGINE OIL
LEAK INSPECTION.....................8
DIAGNOSIS AND TESTING - CYLINDER
COMPRESSION PRESSURE TEST.........9
DIAGNOSIS AND TESTING - CYLINDER
COMBUSTION PRESSURE LEAKAGE
TEST................................9
STANDARD PROCEDURE
STANDARD PROCEDURE - ENGINE CORE
AND OIL GALLERY PLUGS..............10
STANDARD PROCEDURE - REPAIR OF
DAMAGED OR WORN THREADS.........10
STANDARD PROCEDURE - HYDROSTATIC
LOCKED ENGINE.....................10
STANDARD PROCEDURE - FORM-IN-
PLACE GASKETS AND SEALERS.........11
STANDARD PROCEDURE - ENGINE
GASKET SURFACE PREPARATION........11
STANDARD PROCEDURE - MEASURING
BEARING CLEARANCE USING
PLASTIGAGE........................12
REMOVAL - ENGINE ASSEMBLY...........13
INSTALLATION - ENGINE ASSEMBLY........16
SPECIFICATIONS
SPECIFICATIONS - 2.4L ENGINE.........17
SPECIFICATIONS - TORQUE............20
SPECIAL TOOLS
2.4L ENGINE.........................21AIR CLEANER ELEMENT
REMOVAL.............................24
INSTALLATION.........................24
AIR CLEANER HOUSING
REMOVAL.............................24
INSTALLATION.........................24
CYLINDER HEAD
DESCRIPTION.........................24
DIAGNOSIS AND TESTINGÐCYLINDER HEAD
GASKET............................24
REMOVAL - CYLINDER HEAD.............25
CLEANING............................26
INSPECTION..........................26
INSTALLATION - CYLINDER HEAD..........26
CAMSHAFT OIL SEAL(S)
REMOVAL.............................27
INSTALLATION.........................28
CAMSHAFT(S)
DESCRIPTION.........................28
OPERATION...........................28
STANDARD PROCEDURE - MEASURING
CAMSHAFT END PLAY.................29
REMOVAL.............................29
CLEANING............................29
INSPECTION..........................30
INSTALLATION.........................30
CYLINDER HEAD COVER
REMOVAL.............................31
CLEANING............................31
INSPECTION..........................31
INSTALLATION.........................31
INTAKE/EXHAUST VALVES & SEATS
DESCRIPTION.........................32
CLEANING............................32
VALVE SPRINGS & SEALS
REMOVAL
REMOVAL - CYLINDER HEAD ON.........32
RSENGINE9-1

DIAGNOSIS AND TESTING - ENGINE DIAGNOSIS - MECHANICAL
CONDITION POSSIBLE CAUSES CORRECTION
NOISY VALVES 1. High or low oil level in
crankcase.1. Check and correct engine oil
level.
2. Thin or diluted oil. 2. Change oil to correct viscosity.
3. Thick oil 3. (a) Change engine oil and filter.
(b) Run engine to operating
temperature.
(c) Change engine oil and filter
again.
4. Low oil pressure. 4. Check and correct engine oil
pressure problem.
5. Dirt in hydraulic lifters/lash
adjusters.5. Replace hydraulic lifters/lash
adjusters.
6. Worn rocker arms. 6. Inspect oil supply to rocker arms.
7. Worn hydraulic lifters/lash
adjusters.7. Replace hydraulic lifters/lash
adjusters.
8. Worn valve guides. 8. Replace cylinder head assembly.
9. Excessive runout of valve seats
on valve faces.9. Grind valve seats and valves.
CONNECTING ROD NOISE 1. Insufficient oil supply. 1. Check engine oil level.
2. Low oil pressure. 2. Check engine oil level. Inspect oil
pump relief valve and spring.
3. Thin or diluted oil. 3. Change oil to correct viscosity.
4. Thick oil 4. (a) Change engine oil and filter.
(b) Run engine to operating
temperature.
(c) Change engine oil and filter
again.
5. Excessive bearing clearance. 5. Measure bearings for correct
clearance. Repair as necessary.
6. Connecting rod journal
out-of-round.6. Replace crankshaft or grind
surface.
7. Misaligned connecting rods. 7. Replace bent connecting rods.
9 - 6 ENGINE 2.4LRS
ENGINE 2.4L (Continued)

AIR CLEANER ELEMENT
REMOVAL
(1) Unsnap 2 clips.
(2) Lift cover and pull toward the engine and
remove cover tabs from air box.
(3) Lift cover and remove the element (Fig. 11).
INSTALLATION
(1) Install the air filter element into air box (Fig.
11).
(2) Move cover so that the tabs insert into the air
box.
(3) Push cover down and snap the 2 clips.
AIR CLEANER HOUSING
REMOVAL
(1) Disconnect the negative battery cable.
(2) Disconnect the inlet air temperature sensor
(Fig. 12).
(3) Remove the inlet hose to throttle body (Fig. 11).
(4) Remove the bolt for air box at upper radiator
cross member.
(5) Pull air box up and off over the single locating
pin.
(6) Remove air box from vehicle
INSTALLATION
(1) Install air box into vehicle and onto the locat-
ing pin.(2) Install bolt to hold air box to the upper radia-
tor cross member.
(3) Install the inlet hose to the throttle body.
(4) Connect the inlet air temperature sensor (Fig.
12).
(5) Connect the negative battery cable.
CYLINDER HEAD
DESCRIPTION
The cross flow designed, aluminum cylinder head
contains dual over-head camshafts with four valves
per cylinder (Fig. 13). The valves are arranged in two
in-line banks. The intake valves face toward the
front of the vehicle. The exhaust valves face the dash
panel. The cylinder head incorporates powdered
metal valve guides and seats. The cylinder head is
sealed to the block using a multi-layer steel head
gasket and retaining bolts.
Integral oil galleries provide lubrication passages
to the hydraulic lash adjusters, camshafts, and valve
mechanisms.
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 misfiring
²Poor fuel economy
Possible indications of the cylinder head gasket
leaking between a cylinder and an adjacent water
jacket are:
²Engine overheating
²Loss of coolant
Fig. 11 AIR BOX COVER
Fig. 12 IAT SENSOR 2.4L
9 - 24 ENGINE 2.4LRS

(6) If the PCV valve was removed, apply Mopart
Thread Sealant with Teflon to threads and install
valve to cylinder head cover. Tighten PCV valve to 8
N´m (70 in. lbs.).
(7) Connect PCV and make-up air hoses to cylin-
der head cover.
(8) Install upper intake manifold. (Refer to 9 -
ENGINE/MANIFOLDS/INTAKE MANIFOLD -
INSTALLATION)
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.
Fig. 32 Cylinder Head Cover Tightening Sequence
(Typical Cover Shown)
Fig. 33 Valve Spring - Removal/Installation
1 - VALVE SPRING COMPRESSOR MD 998772A
2 - AIR HOSE
9 - 32 ENGINE 2.4LRS
CYLINDER HEAD COVER (Continued)

ENGINE 3.3/3.8L
TABLE OF CONTENTS
page page
ENGINE 3.3/3.8L
DESCRIPTION.........................76
DIAGNOSIS AND TESTING
DIAGNOSIS AND TESTING - ENGINE
DIAGNOSIS - INTRODUCTION...........76
DIAGNOSIS AND TESTING - ENGINE
DIAGNOSIS - PERFORMANCE...........78
DIAGNOSIS AND TESTING - ENGINE
DIAGNOSIS - MECHANICAL.............80
DIAGNOSIS AND TESTING - ENGINE OIL
LEAK INSPECTION....................82
DIAGNOSIS AND TESTING - CYLINDER
COMPRESSION PRESSURE TEST........83
DIAGNOSIS AND TESTING - CYLINDER
COMBUSTION PRESSURE LEAKAGE
TEST...............................83
STANDARD PROCEDURE
STANDARD PROCEDURE - MEASURING
BEARING CLEARANCE USING
PLASTIGAGE........................84
STANDARD PROCEDURE - FORM-IN-
PLACE GASKETS AND SEALERS.........84
STANDARD PROCEDURE - ENGINE
GASKET SURFACE PREPARATION........85
STANDARD PROCEDURE - HYDROSTATIC
LOCKED ENGINE.....................85
STANDARD PROCEDURE - REPAIR OF
DAMAGED OR WORN THREADS.........86
STANDARD PROCEDURE - ENGINE CORE
AND OIL GALLERY PLUGS..............86
REMOVAL - ENGINE ASSEMBLY...........86
INSTALLATION - ENGINE ASSEMBLY........89
SPECIFICATIONS
3.3/3.8L ENGINE......................91
SPECIFICATIONS - TORQUE............95
SPECIAL TOOLS
3.3/3.8L ENGINE......................95
AIR CLEANER ELEMENT
REMOVAL.............................98
INSTALLATION.........................98
AIR CLEANER HOUSING
REMOVAL.............................99
INSTALLATION.........................99
CYLINDER HEAD
DESCRIPTION.........................99
DIAGNOSIS AND TESTINGÐCYLINDER HEAD
GASKET............................99
REMOVAL - CYLINDER HEAD............100
CLEANING...........................100INSPECTION.........................101
INSTALLATION - CYLINDER HEAD.........101
CYLINDER HEAD COVER(S)
DESCRIPTION........................102
CYLINDER HEAD COVER - RIGHT
REMOVAL............................102
INSTALLATION........................103
CYLINDER HEAD COVER - LEFT
REMOVAL............................103
INSTALLATION........................103
INTAKE/EXHAUST VALVES & SEATS
DESCRIPTION........................104
OPERATION..........................104
STANDARD PROCEDURE - REFACING
VALVESANDVALVESEATS ............104
REMOVAL............................105
CLEANING...........................105
INSPECTION.........................105
INSTALLATION........................106
VALVE SPRINGS
DESCRIPTION........................106
OPERATION..........................106
REMOVAL
REMOVAL - CYLINDER HEAD OFF.......106
REMOVAL - CYLINDER HEAD ON........106
INSPECTION.........................108
INSTALLATION
INSTALLATION - CYLINDER HEAD OFF . . . 108
INSTALLATION - CYLINDER HEAD ON....108
ROCKER ARMS
DESCRIPTION
DESCRIPTION - ROCKER ARMS.........109
DESCRIPTION - PUSHRODS...........109
OPERATION
OPERATION - ROCKER ARMS..........109
OPERATION - PUSHRODS.............109
REMOVAL - ROCKER ARMS AND SHAFT....109
DISASSEMBLY - ROCKER ARMS AND SHAFT. . 109
ASSEMBLY - ROCKER ARMS AND SHAFT . . . 109
INSTALLATION - ROCKER ARMS AND SHAFT..110
VALVE STEM SEALS
DESCRIPTION........................111
REMOVAL............................112
INSTALLATION........................112
ENGINE BLOCK
DESCRIPTION........................112
STANDARD PROCEDURE - CYLINDER BORE
HONING............................112
CLEANING...........................112
9 - 74 ENGINE 3.3/3.8LRS

DIAGNOSIS AND TESTING - ENGINE DIAGNOSIS - MECHANICAL
CONDITION POSSIBLE CAUSES CORRECTION
NOISY VALVES 1. High or low oil level in
crankcase.1. Check and correct engine oil
level.
2. Thin or diluted oil. 2. Change oil to correct viscosity.
3. Thick oil 3. (a) Change engine oil and filter.
(b) Run engine to operating
temperature.
(c) Change engine oil and filter
again.
4. Low oil pressure. 4. Check and correct engine oil
pressure problem.
5. Dirt in hydraulic lifters/lash
adjusters.5. Replace hydraulic lifters/lash
adjusters.
6. Worn rocker arms. 6. Inspect oil supply to rocker arms.
7. Worn hydraulic lifters/lash
adjusters.7. Replace hydraulic lifters/lash
adjusters.
8. Worn valve guides. 8. Replace cylinder head assembly.
9. Excessive runout of valve seats
on valve faces.9. Grind valve seats and valves.
CONNECTING ROD NOISE 1. Insufficient oil supply. 1. Check engine oil level.
2. Low oil pressure. 2. Check engine oil level. Inspect oil
pump relief valve and spring.
3. Thin or diluted oil. 3. Change oil to correct viscosity.
4. Thick oil 4. (a) Change engine oil and filter.
(b) Run engine to operating
temperature.
(c) Change engine oil and filter
again.
5. Excessive bearing clearance. 5. Measure bearings for correct
clearance. Repair as necessary.
6. Connecting rod journal
out-of-round.6. Replace crankshaft or grind
surface.
7. Misaligned connecting rods. 7. Replace bent connecting rods.
9 - 80 ENGINE 3.3/3.8LRS
ENGINE 3.3/3.8L (Continued)

AIR CLEANER HOUSING
REMOVAL
(1) Disconnect the negative battery cable.
(2) Disconnect the inlet air temperature sensor
(Fig. 16).
(3) Remove the inlet hose to throttle body.
(4) Remove the bolt for air box at upper radiator
cross member.
(5) Pull air box up and off over the single locating
pin.
(6) Remove air box from vehicle
INSTALLATION
(1) Install air box into vehicle and onto the locat-
ing pin.
(2) Install bolt to hold air box to the upper radia-
tor cross member.
(3) Install the inlet hose to the throttle body.
(4) Connect the inlet air temperature sensor (Fig.
16).
(5) Connect the negative battery cable.
CYLINDER HEAD
DESCRIPTION
The aluminum cylinder heads (Fig. 17) 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
incorporates the combustion chamber. Two valves
per-cylinder 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 misfiring
²Poor 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.
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.
Fig. 16 Inlet Air Temperature Sensor
RSENGINE 3.3/3.8L9-99