oil CHRYSLER VOYAGER 2004 Service Manual
[x] Cancel search | Manufacturer: CHRYSLER, Model Year: 2004, Model line: VOYAGER, Model: CHRYSLER VOYAGER 2004Pages: 2585, PDF Size: 62.54 MB
Page 1463 of 2585

(1) Install the main bearing upper shells with the
lubrication groove and oil hole in the engine block
(Fig. 6).
(2) Make certain oil holes in block line up with oil
hole in bearings and bearing tabs seat in the block
tab slots.
NOTE: If the crankshaft is sent out for machine
work, it must be balenced as an assembly with the
target ring installed.
(3) Clean crankshaft and target ring with
MOPARtbrake parts cleaner and dry with com-
pressed air to ensure that the crankshaft mating sur-
face and target ring mounting holes are free from oil
and lock patch debris.
NOTE: Always use NEW mounting screws whether
installing original or new target ring.
(4) InstallNEWmounting screws finger tight
starting with the #1 location. (Fig. 7) Make sure
engagment occurs with the shoulder of the screw and
mounting hole before starting all other screws.
(5) Torque all mounting screws with T30 torx bit
to 13 Nm (110 in-lbs) following the torque sequence.
CAUTION: Use extreme care when handling crank-
shaft. Tone wheel damage can occur if crankshaft is
mis-handled.
CAUTION: Do not get oil on the bed plate mating
surface. It will affect the ability of the sealer to seal
the bed plate to cylinder block.(6) Oil the bearings and journals. Install crank-
shaft in the engine block.
CAUTION: Use only MoparTBed Plate Sealant on
the bed plate or damage may occur to the engine.
(7) Install lower main bearings into main bearing
cap/bed plate. Make certain the bearing tabs are
seated into the bed plate slots and apply oil.
(8) Apply 1.5 to 2.0 mm (0.059 to 0.078 in.) bead of
MopartBed Plate Sealant to bed plate as shown in
(Fig. 8).
Fig. 6 Installing Main Bearing Upper Shell
1 - LUBRICATION GROOVES
2 - OIL HOLESFig. 7 Target Ring Torque Sequence
Fig. 8 Bed Plate Sealing
9s - 8 ENGINE 2.4L SUPPLEMENTRS
CRANKSHAFT (Continued)
Page 1464 of 2585

(9) Install the main bearing/bed plate into engine
block.
(10) Before installing the bolts the threads should
be oiled with clean engine oil, wipe off any excess oil.
(11) Install main bearing bed plate to engine
block bolts 11, 17, and 20 finger tight. Tighten these
bolts down together until the bed plate contacts the
cylinder block.
(12) To ensure correct thrust bearing alignment,
perform the following steps:
²Step 1: Rotate crankshaft until number 4 piston
is at TDC.
²Step 2: Move crankshaft rearward to limits of
travel.
²Step 3: Then, move crankshaft forward to limits
of travel.
²Step 4: Wedge an appropriate tool between the
rear of the cylinder block(NOT BED PLATE)and
the rear crankshaft counterweight. This will hold the
crankshaft in it's furthest forward position.
²Step 5: Install and tighten bolts (1±10) in
sequence shown in (Fig. 9) to 41 N´m (30 ft. lbs.).
²Step 6: Remove wedge tool used to hold crank-
shaft.
(13) Tighten bolts (1±10) again to 41 N´m (30 ft.
lbs.) in sequence shown in (Fig. 9).
CAUTION: Do Not use a torque wrench for the fol-
lowing step.
(14) Turn bolts (1±10) an additional 1/4 turn in
sequence shown in (Fig. 9).(15) Install main bearing bed plate to engine
block bolts (11±20), and torque each bolt to 28 N´m
(250 in. lbs.) in sequence shown in. (Fig. 9)
(16) Tighten bolts (11±20) again to 28 N´m (250 in.
lbs.) in sequence shown in (Fig. 9).
(17) After the main bearing bed plate is installed,
check the crankshaft turning torque. The turning
torque should not exceed 5.6 N´m (50 in. lbs.).
(18) Check crankshaft end play (Refer to 9 -
ENGINE/ENGINE BLOCK/CRANKSHAFT - STAN-
DARD PROCEDURE).
(19) Install connecting rod bearings and caps.Do
Not Reuse Connecting Rod Bolts.Torque connect-
ing rod bolts to 27 N´m (20 ft. lbs.) plus 1/4 turn.
(20) Install balance shafts and housing assembly
(Refer to 9 - ENGINE/VALVE TIMING/BALANCE
SHAFT - INSTALLATION).
(21) Install the oil pump (Refer to 9 - ENGINE/
LUBRICATION/OIL PUMP - INSTALLATION).
(22) Install oil pump pick-up tube. Torque fastener
to 28 N´m (20 ft.. lbs.).
(23) Install the oil pan (Refer to 9 - ENGINE/LU-
BRICATION/OIL PAN - INSTALLATION).
(24) Install crankshaft position sensor.
(25) Install cylinder head if it was removed (Refer
to 9 - ENGINE/CYLINDER HEAD - INSTALLA-
TION).
(26) Install the timing belt rear cover (Refer to 9 -
ENGINE/VALVE TIMING/TIMING BELT COVER(S)
- INSTALLATION).
(27) Install crankshaft sprocket (Refer to 9 -
ENGINE/VALVE TIMING/TIMING BELT AND
SPROCKETS - INSTALLATION).
(28) Install the timing belt (Refer to 9 - ENGINE/
VALVE TIMING/TIMING BELT AND SPROCKETS -
INSTALLATION).
(29) Install the timing belt front covers (Refer to 9
- ENGINE/VALVE TIMING/TIMING BELT COV-
ER(S) - INSTALLATION).
(30) Install engine mount support bracket.
(31) InstallNEWoil filter.
(32) Install crankshaft rear oil seal (Refer to 9 -
ENGINE/ENGINE BLOCK/CRANKSHAFT OIL
SEAL - REAR - INSTALLATION).
(33) Install flex plate. Apply MopartLock & Seal
Adhesive to bolt threads and tighten to 95 N´m (70
ft. lbs.).
(34) Attach transaxle to engine. Tighten attaching
bolts to 101 N´m (75 ft. lbs.).
(35) Install the engine assembly (Refer to 9 -
ENGINE - INSTALLATION).
Fig. 9 Main Bearing Caps/Bed Plate Bolt Torque
Sequence
RSENGINE 2.4L SUPPLEMENT9s-9
CRANKSHAFT (Continued)
Page 1467 of 2585

CONNECTING RODS
DESCRIPTION SPECIFICATION
Metric Standard
Bearing
Clearance0.019-0.065
mm.0.017-0.020 in.
Wear Limit 0.074 mm 0.003 in.
Side Clearance 0.13-0.32 mm 0.005-0.013 in.
Wear Limit 0.38 mm 0.015 in.
PISTONS
DESCRIPTION SPECIFICATION
Metric Standard
Piston Diameter
3.3L-Measured
39.8 mm (1.567
in) From Piston
To p92.968-92.998
mm.3.660-3.661 in.
Piston Diameter
3.8L-Measured
33.01 mm (1.30
in) From Piston
To p95.968-95.998
mm.3.778-3.779 in.
Clearance in
Bore @ Size
Location (New)-0.005-0.039
mm-0.0002±0.0015
in.
Weight 3.3L 362 5 grams 12.77 0.1764
oz.
Weight 3.8L 426 5 grams 15.03 0.1764
oz.
PISTON PINS
DESCRIPTION SPECIFICATION
Metric Standard
Type Press Fit in Rod (Serviced as a
Assembly)
Clearance in
Piston @ 21C
(70ÉF)0.006-0.019
mm0.0002-0.0007
in.
Clearance in
Connecting RodInterference Fit
Diameter 22.87-22.88
mm0.9007-0.9009
in.
Length 3.3L 67.25-67.75
mm2.648-2.667 in.
Length 3.8L 71.25-71.75
mm2.805-2.824 in.
PISTON RINGS
DESCRIPTION SPECIFICATION
Metric Standard
Ring End Gap
To p
Compression
Ring0.18-0.38 mm 0.007-0.015 in.
Second
Compression
Ring0.28-0.57 mm 0.011-0.022 in.
Oil Control
(Steel Rails)0.23-0.78 mm 0.009-0.030 in.
Wear Limit-
Compression
Rings1.0 mm 0.039 in.
Wear Limit-Oil
Control Steel
Rails1.88 mm 0.074 in.
Ring Side
Clearance
To p
Compression
Ring 3.3L0.030-0.080
mm0.0012-0.0031
in.
To p
Compression
Ring 3.8L0.030-0.069
mm0.0012-0.0027
in.
Second
Compression
Ring 3.3L0.030-0.095
mm0.0012-0.0037
in.
Second
Compression
Ring 3.8L0.041-0.085
mm0.0016-0.0033
in.
Oil Ring (Steel
Ring)0.039-0.200
mm0.0015-0.0078
in.
Wear Limit- Top
Ring0.10 mm 0.004 in.
Wear Limit-2nd
Ring0.13 mm 0.005
Wear Limit Oil
Ring Pack0.266 mm 0.009
Ring Width-Top
Compression
Ring 3.3L1.46-1.49 mm 0.0575-0.058 in.
Ring Width-Top
Compression
Ring 3.8L1.175-1.190
mm0.0462-0.0468
9s - 12 ENGINE 3.3/3.8L SUPPLEMENTRS
ENGINE 3.3/3.8L SUPPLEMENT (Continued)
Page 1468 of 2585

DESCRIPTION SPECIFICATION
Metric Standard
Ring End Gap
Ring Width-2nd
Compression
Ring 3.3L and
3.8L1.46-1.49 mm 0.0575-0.058 in.
Ring Width-Oil
Ring (Steel
Rails) 3.3L0.435-0.490
mm-.017-0.019 in.
Ring Width-Oil
Ring (Steel
Rails) 3.8L0.435-0.510
mm0.017-0.020
CAMSHAFT
DESCRIPTION SPECIFICATION
Metric Standard
Journal
Diameter
#1 50.724-50.775
mm1.997-1.999 in.
#2 50.317-50.368
mm1.9809-1.9829
in.
#3 49.936-49.987
mm1.9659-1.9679
in.
#4 49.530-49.581
mm1.9499-1.9520
in.
Bearing
Clearance-
Diametrical0.025-0.101
mm0.001-0.004 in.
Bearing
Clearance
(Max.Allowable)0.127 mm 0.005 in.
End Play 0.254-0.508
mm0.010-0.020 in.
Camshaft
Bearing
Diameter
#1 50.800-50.825 1.9999-2.0009
in.
#2 50.393-50.419
mm1.9839-1.9849
in.
#3 50.013-50.038
mm1.9690-1.9699
in.
#4 49.606-49.632
mm1.9529-1.954 in.
Exhaust Valve
Timing
DESCRIPTION SPECIFICATION
Metric Standard
Journal
Diameter
Closes-3.3L
(ATDC)- 13É
Closes-3.8L
(ATDC)- 18É
Opens-3.3L
(BBDC)- 43É
Opens-3.8L
(BBDC)- 46É
Duration-3.3L - 236É
Duration-3.8L - 244É
Intake Valve
Timing
Closes-3.3L
(ABDC)- 52É
Closes-3.8L
(ABDC)- 63É
Opens-3.3L
(ATDC)-6É
Opens-3.8L
(ATDC)-1É
Duration-3.3L - 226É
Duration-3.8L - 242É
Valve Overlap-
3.3L-7É
Valve Overlap-
3.8L- 17É
HYDRAULIC LIFTER
DESCRIPTION SPECIFICATION
Metric Standard
Type Hydraulic Roller
Outside
Diameter22.949-22.962
mm0.903-0.904 in.
Clearance in
Block0.020-0.061
mm0.0007-0.0024
in.
RSENGINE 3.3/3.8L SUPPLEMENT9s-13
ENGINE 3.3/3.8L SUPPLEMENT (Continued)
Page 1470 of 2585

VALVE STEM TO GUIDE CLEARANCE
DESCRIPTION SPECIFICATION
Metric Standard
Intake 0.025-0.065
mm0.001-0.0025 in.
Exhaust 0.059-0.094
mm0.002-0.0037 in.
Max Allowable-
Intake (Rocking
Method)0.247 mm 0.010 in.
Max Allowable-
Exhaust
(Rocking
Method)0.414 mm 0.016 in.
PUSH RODS
DESCRIPTION SPECIFICATION
Metric Standard
Length 135.438 mm 5.33 in.
VALVE SPRING
DESCRIPTION SPECIFICATION
Metric Standard
Free Length-
Type A51.4 mm 2.02 in.
Free Length-
Type B53.4 mm 2.10 in.
Wire Diameter
Type A3.95-4.77 mm 0.15-0.19 in.
Wire Diameter
Type B4.19-4.29 mm 0.16-0.17 in.
Number of Coils
Type A7.52
Number of Coils
Type B7.25
Spring Tension
(Valve Closed)
Type A376.4-424.4 N
@ 41.9 mm84.6-95.6 lbs. @
1.65 in.
Spring Tension
(Valve Open)
Type A863.9-959.9 N
@ 41.9 mm194.2-215.8 lbs.
@ 1.65 in.
Spring Tension
(Valve Closed)
Type B377-423 N @
41.9 mm84.8-95.2 lbs. @
1.65 in.
Spring Tension
(Valve Open)
Type B880-962 N @
30.91 mm197.9-216.3 lbs.
@ 122 in.
Installed Height 41.1-42.7 mm 1.61-1.68 in
LUBRICATION
DESCRIPTION SPECIFICATION
Metric Standard
At Curb Idle
Speed*
(Minimum with
engine at
operating
temperature)34.47 kPa 5 psi
At 3000 RPM 205-551 kPa 30-80 psi
Oil Filter
By-Pass Valve
Setting62-103 kPa 9-15 psi
Oil Pressure
Switch Actuating
Pressure14-28 Kpa 2-4 psi
caution:
*If pressure is ZERO at curb idle, DO NOT run engine
at 3000 rpm.
OIL PUMP
DESCRIPTION SPECIFICATION
Metric Standard
Clearance Over
rotors-Inner and
Outer0.10 mm 0.004 in.
Cover
Out-Of-Flat
(Max.)0.025 mm 0.001 in.
Inner Rotor
Thickness7.64 mm 0.301 in.
Outer Rotor
Thickness (Min)7.64 mm 0.301 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.
RSENGINE 3.3/3.8L SUPPLEMENT9s-15
ENGINE 3.3/3.8L SUPPLEMENT (Continued)
Page 1472 of 2585

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) Drain the cooling system. (Refer to 7 - COOL-
ING - STANDARD PROCEDURE)
(2) Disconnect negative cable from battery.
(3) Remove upper and lower intake manifolds.
(Refer to 9 - ENGINE/MANIFOLDS/INTAKE MANI-
FOLD - REMOVAL)
WARNING: INTAKE MANIFOLD GASKET IS MADE
OF VERY THIN METAL AND MAY CAUSE PER-
SONAL INJURY, HANDLE WITH CARE.
(4) Remove the cylinder head covers. (Refer to 9 -
ENGINE/CYLINDER HEAD/CYLINDER HEAD
COVER(S) - REMOVAL)
(5) Remove the spark plugs from cylinder head.
(6) Remove the dipstick and tube (Fig. 2).
(7) Remove exhaust manifold(s). (Refer to 9 -
ENGINE/MANIFOLDS/EXHAUST MANIFOLD -
REMOVAL)
(8) Remove rocker arm and shaft assemblies.(Refer
to 9 - ENGINE/CYLINDER HEAD/ROCKER ARMS -REMOVAL) Remove push rods andmark positions
to ensure installation in original locations.
(9) Remove the eight head bolts from each cylinder
head and remove cylinder heads (Fig. 6).
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.
INSPECTION
(1) Before cleaning, check for leaks, damage and
cracks.
(2) Clean cylinder head and oil passages.
(3) Check cylinder head for flatness (Fig. 3).
(4) Cylinder head must be flat within:
Fig. 2 DIPSTICK & TUBE
1 - DIPSTICK
2 - BOLT
3 - TUBE
RSENGINE 3.3/3.8L SUPPLEMENT9s-17
CYLINDER HEAD (Continued)
Page 1474 of 2585

(10) Install the exhaust manifolds. (Refer to 9 -
ENGINE/MANIFOLDS/EXHAUST MANIFOLD -
INSTALLATION)
(11) Install new O-ring on dipstick tube. Install
dipstick tube assembly (Fig. 2).
(12) Install the spark plugs.
(13) Install upper and lower intake manifolds.
(Refer to 9 - ENGINE/MANIFOLDS/INTAKE MANI-
FOLD - INSTALLATION)
(14) Fill the cooling system. (Refer to 7 - COOL-
ING - STANDARD PROCEDURE)
(15) Connect negative cable to battery.
CYLINDER HEAD COVER(S)
DESCRIPTION
The cylinder head covers are made of stamped
steel. The covers are sealed with steel reinforced sil-
icon rubber gaskets. The cylinder head cover uses
rubber isolators at each fastener location (Fig. 7).
NOTE: Due to the tight packaging near the cylinder
head covers, which makes spill clean-up difficult, a
spill during an engine oil change may be misinter-
preted as an oil leak. When investigating an oil leak
in the location of the cylinder head covers and
intake manifold, follow the procedure found in Oil
Leak Diagnosis (Refer to 9 - ENGINE - DIAGNOSIS
AND TESTING) for determining the source of a leak.
CYLINDER HEAD COVER-
RIGHT
REMOVAL
(1) Disconnect negative cable from battery.
(2) Remove the wiper module. (Refer to 8 - ELEC-
TRICAL/WIPERS/WASHERS/WIPER MODULE -
REMOVAL)
(3) Disconnect spark plug wires from plugs.
(4) Disconnect PCV hose from cylinder head cover
(Fig. 8).
(5) Remove cylinder head cover bolts.
(6) Remove cylinder head cover and gasket (Fig.
7).
INSTALLATION
(1) Clean cylinder head and cover mating surfaces.
Inspect cylinder head cover surface for flatness.
Replace gasket as necessary.
(2) Inspect seal on the cover bolt for wear or dam-
age (Fig. 9). Replace bolt assembly as necessary.
NOTE: The cylinder head cover bolts contain a
torque limiter sleeve and a seal (Fig. 9). The seal
and torque sleeve is replaced with the bolt.
Fig. 7 Cylinder Head Cover
1 - CYLINDER HEAD COVER
2 - BOLT
Fig. 8 PCV Hose
1 - HOSE - PCV
2 - P C V VA LV E
RSENGINE 3.3/3.8L SUPPLEMENT9s-19
CYLINDER HEAD (Continued)
Page 1478 of 2585

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)
Page 1481 of 2585

INSTALLATION
INSTALLATION - CYLINDER HEAD OFF
(1) If removed, install a new valve stem seal (Refer
to 9 - ENGINE/CYLINDER HEAD/VALVE STEM
SEALS - INSTALLATION).
(2) Position valve spring and retainer on spring
seat.
(3) Using Special Tool C-3422-D with 8464 Adapter
(Fig. 20), compress the spring only enough to install
the valve retainer locks. Install valve retainer locks.
(4) Slowly release the spring tension. Ensure the
retainer locks are seated properly (Fig. 23).
INSTALLATION - CYLINDER HEAD ON
(1) The intake valve stem seals should be pushed
firmly and squarely over the valve guide using the
valve stem as guide.Do Not Forceseal against top
of guide. When installing the valve retainer locks,
compress the springonly enoughto install the locks
(Fig. 23).
CAUTION: Do not pinch seal between retainer and
top of valve guide.
(2) Follow the same procedure on the remaining 5
cylinders using the firing sequence 1-2-3-4-5-6.Make
sure piston in cylinder is at TDC on the valve
spring that is being covered.
(3) Remove spark plug adapter tool.
(4) Install rocker arms and shaft assembly. (Refer
to 9 - ENGINE/CYLINDER HEAD/ROCKER ARMS -
INSTALLATION)(5) Install cylinder head covers. (Refer to 9 -
ENGINE/CYLINDER HEAD/CYLINDER HEAD
COVER(S) - INSTALLATION)
(6) Install spark plugs and connect wires.
(7) Connect negative cable to battery.
ROCKER ARMS
DESCRIPTION
DESCRIPTION - ROCKER ARMS
The rocker arms are installed on the rocker arm
shaft. The rocker arms and shaft assembly is
attached to the cylinder head with seven billeted
bolts and retainers. The rocker arms are made of
stamped steel.
DESCRIPTION - PUSHRODS
The pushrods are made of steel and are a hollow
design. The pushrods are positioned between the
hydraulic lifter and the rocker arm.
OPERATION
OPERATION - ROCKER ARMS
The rocker arm pivots on the rocker shaft. Rocker
arms are used to translate up and down motions pro-
vided by the camshaft, hydraulic lifter, and pushrod
on one end, into a down and up motions on the valve
stem on the opposing end.
OPERATION - PUSHRODS
The pushrod is a solid link between the hydraulic
lifter and the rocker arm. Also, the pushrod supplies
engine oil from the hydraulic lifter to the rocker arm.
Fig. 23 VALVE SPRING INSTALLED
1 - VALVE SPRING RETAINER
2 - VALVE INSTALLED HEIGHT
3 - CYLINDER HEAD SURFACE
4 - VALVE SPRING SEAT SURFACE
5 - VALVE SPRING INSTALLED HEIGHT
9s - 26 ENGINE 3.3/3.8L SUPPLEMENTRS
VALVE SPRINGS (Continued)
Page 1483 of 2585

erly positioned and installed in the correct locations
(Fig. 26).
(2) Install rocker arms and shaft to the cylinder
head. (Refer to 9 - ENGINE/CYLINDER HEAD/
ROCKER ARMS - INSTALLATION)
INSTALLATION - ROCKER ARMS AND SHAFT
CAUTION: Ensure the longer shaft retaining bolt is
installed in the proper location on the rocker shaft.
(Refer to 9 - ENGINE/CYLINDER HEAD/ROCKER
ARMS - ASSEMBLY)
(1) Position the rocker arm and shaft assemblies
on the pedestal mounts.
CAUTION: Ensure all pushrods are properly located
on the lifter and the rocker arm socket.
(2) Align each rocker arm socket with each push-
rod end.
CAUTION: The rocker arm shaft should be tight-
ened down slowly, starting with the center bolts.
Allow 20 minutes lifter bleed down time after instal-
lation of the rocker shafts before engine operation.(3) Slowly tighten rocker shaft bolts evenly until
shaft is seated. Tighten bolts to 23 N´m (200 in. lbs.)
(Fig. 27).
(4) Install the cylinder head cover(s). (Refer to 9 -
ENGINE/CYLINDER HEAD/CYLINDER HEAD
COVER(S) - INSTALLATION)
Fig. 26 ROCKER ARMS AND SHAFT
1 - BOLT (ROCKER SHAFT OIL FEED - LONGER LENGTH) 5 - ROCKER ARM - EXHAUST
2 - SHAFT RETAINER/SPACER - 21.5 mm (0.84 in.) 6 - WASHER
3 -SHAFT RETAINER/SPACER - 37.5 mm (1.47 in.) 7 - ROCKER ARM - INTAKE (LARGER OFFSET)
4 - SHAFT RETAINER/SPACER - 40.9 mm (1.61 in.) 8 - ROCKER ARMS LUBRICATION FEED HOLE (POSITION
UPWARD & TOWARD VALVE SPRING)
Fig. 27 ROCKER ARMS AND SHAFT
1 - ROCKER ARMS AND SHAFT ASSEMBLY
2 - ROCKER SHAFT BOLTS
9s - 28 ENGINE 3.3/3.8L SUPPLEMENTRS
ROCKER ARMS (Continued)