2006 INFINITI M35 service

EM-242
[VK45DE]
CYLINDER HEAD
Revision: 2006 January2006 M35/M45
VALVE SEAT CONTACT
After confirming that the dimensions of valve guides and valves
are within the specifications, perform this procedure.
Apply prussian blue (or white lead) onto contacting surface of
valve seat to check the condition of the valve contact on the sur-
face.
Check if the contact area band is continuous all around the cir-
cumference.
If not, grind to adjust valve fitting and check again. If the contact-
ing surface still has “NG” conditions even after the re-check,
replace valve seat. Refer to EM-242, "
VALVE SEAT REPLACE-
MENT" .
VALVE SEAT REPLACEMENT
When valve seat is removed, replace with oversized [0.5 mm (0.020 in)] valve seat.
1. Bore out old seat until it collapses. Boring should not continue beyond the bottom face of the seat recess
in cylinder head. Set the machine depth stop to ensure this. Refer to EM-281, "
Va l v e S e a t" .
CAUTION:
Prevent to scratch cylinder head by excessive boring.
2. Ream cylinder head recess diameter for service valve seat.
Be sure to ream in circles concentric to valve guide center.
This will enable valve to fit correctly.
3. Heat cylinder head to 110 to 130
C (230 to 266F) by soaking in
heated oil.
4. Provide valve seats cooled well with dry ice. Force fit valve seat into cylinder head.
WA R N I N G :
Cylinder head contains heat. When working, wear protective equipment to avoid getting burned.
CAUTION:
Avoid directly touching cold valve seats.
SBIA0322E
Oversize [0.5 mm (0.020 in)]
Intake : 37.500 - 37.516 mm (1.4764 - 1.4770 in)
Exhaust : 32.700 - 32.716 mm (1.2874 - 1.2880 in)
SEM795A
SEM008A

CYLINDER HEAD
EM-243
[VK45DE]
C
D
E
F
G
H
I
J
K
L
MA
EM
Revision: 2006 January2006 M35/M45
5. Using valve seat cutter set (commercial service tool) or valve
seat grinder, finish seat to the specified dimensions. Refer to
EM-281, "
Va l v e S e a t" .
CAUTION:
When using valve seat cutter, firmly grip cutter handle with
both hands. Then, press on the contacting surface all
around the circumference to cut in a single drive. Improper
pressure on with cutter or cutting many different times may
result in stage valve seat.
6. Using compound, grind to adjust valve fitting.
7. Check again for normal contact. Refer to EM-242, "
VALVE SEAT CONTACT" .
VALVE SPRING SQUARENESS
Set try square along the side of valve spring and rotate spring.
Measure the maximum clearance between the top face of spring
and try square.
If it exceeds the limit, replace valve spring.
VALVE SPRING DIMENSIONS AND VALVE SPRING PRESSURE LOAD
Check valve spring pressure at the specified spring height.
If the installation load or load with valve open is out of the standard, replace valve spring.
SEM934C
Limit : 2.0 mm (0.079 in)
PBIC0080E
Standard:
Intake and exhaust
Free height
: 46.35 - 46.85 mm (1.8247 - 1.8444 in)
Installation height
: 33.8 mm (1.331 in)
Installation load
: 165 - 189 N (16.8 - 19.3 kg, 37 - 42 lb)
Height during valve open
: 24.4 mm (0.961 in)
Load with valve open
: 290 - 330 N (29.6 - 33.7 kg, 65 - 74 lb)
SEM113

EM-246
[VK45DE]
ENGINE ASSEMBLY
Revision: 2006 January2006 M35/M45
3. Disengage intermediate fixing point. Pull out engine room harnesses to engine room side, and temporarily
secure them on engine.
CAUTION:
When pulling out harnesses, take care not to damage harnesses and connectors.
After temporarily securing, cover connectors with vinyl or similar material to protect against for-
eign material adhesion.
Vehicle Underbody
1. Remove A/T fluid cooler hoses and power steering oil pump oil cooler hoses.
Install plug to avoid leakage of A/T fluid and power steering fluid.
2. Disconnect heated oxygen sensor 2 harness. Refer to EX-3, "
EXHAUST SYSTEM" .
3. Remove exhaust front tube with power tool. Refer to EX-3, "
EXHAUST SYSTEM" .
4. Disconnect steering lower joint at power steering gear assembly side, and release steering lower shaft.
Refer to PS-13, "
STEERING COLUMN" .
5. Separate steering outer sockets from steering knuckle. Refer to PS-18, "
POWER STEERING GEAR" .
6. Remove A/T control rod at control device assembly side. Then temporarily secure it on transmission, so
that it does not sag. Refer to AT-222, "
SHIFT CONTROL SYSTEM" .
7. Remove rear plate cover from oil pan. Then remove bolts fixing drive plate to torque converter. Refer to
EM-187, "
OIL PAN AND OIL STRAINER" and AT-271, "TRANSMISSION ASSEMBLY" .
8. Remove transmission joint bolts which pierce at oil pan lower rear side. Refer to AT- 2 7 1 , "
TRANSMIS-
SION ASSEMBLY" .
9. Remove lower ends of left and right strut from transverse link. Refer to FSU-6, "
FRONT SUSPENSION
ASSEMBLY" .
10. Remove transverse link mounting bolts at knuckle side. Refer to FSU-14, "
TRANSVERSE LINK" .
11. Remove front stabilizer at transverse link side. Refer to FSU-6, "
FRONT SUSPENSION ASSEMBLY" .
12. Remove rear propeller shaft. Refer to PR-6, "
REAR PROPELLER SHAFT" .
Removal Work
1. Use manual lift table caddy (commercial service tool) or equiva-
lently rigid tool such as transmission jack. Securely support bot-
tom of suspension member and transmission assembly.
CAUTION:
Put a piece of wood or something similar as the supporting
surface, secure a completely stable condition.
2. Remove engine rear member mounting bolts.
3. Remove front suspension member mounting nuts and bolts with power tool. Refer to FSU-6, "
FRONT
SUSPENSION ASSEMBLY" .
4. Carefully lower jack, or raise lift to remove engine, transmission and front suspension member assembly.
When performing work, observe the following caution:
CAUTION:
Confirm there is no interference with vehicle.
Make sure that all connection points have been disconnected.
Keep in mind the center of vehicle gravity changes. If necessary, use jack(s) to support vehicle
at rear jacking point(s) to prevent it from falling it off the lift.
PBIC0804E

EM-252
[VK45DE]
CYLINDER BLOCK
Revision: 2006 January2006 M35/M45
c. Using hammer handle or similar tool, push piston and connect-
ing rod assembly out to the cylinder head side.
CAUTION:
Be careful not to damage the cylinder wall and crankshaft
pin, resulting from an interference of the connecting rod big
end.
11. Remove connecting rod bearings from connecting rod and connecting rod bearing cap.
CAUTION:
Identify installation positions, and store them without mixing them up.
12. Remove piston rings from piston.
Before removing the piston rings, check the piston ring side clearance. Refer to EM-267, "PISTON
RING SIDE CLEARANCE" .
Use piston ring expander (commercial service tool).
CAUTION:
When removing piston rings, be careful not to damage
piston.
Be careful not to damage piston rings by expanding them
excessively.
13. Remove piston from connecting rod as follows:
a. Using snap ring pliers, remove the snap rings.
b. Heat piston to 60 to 70
C (140 to 158F) with industrial use drier
or equivalent.
PBIC0086E
PBIC0087E
PBIC0088E
PBIC0089E

EM-256
[VK45DE]
CYLINDER BLOCK
Revision: 2006 January2006 M35/M45
7. Install each main bearing cap bolt as follows:
a. Apply new engine oil to threads and seating surface of main
bearing cap bolts, and tighten all bolts temporarily.
b. Tighten main bearing cap bolt (M12) in order of 1 to 10.
c. Tighten main bearing cap sub bolt (M9) in order of 11 to 20.
d. Tighten main bearing cap bolt (M12) to 40 degrees clockwise in
order of 1 to 10. (Angle tightening)
CAUTION:
Use angle wrench (SST) to check tightening angle in step
“d” and “e”. Do not make judgment by visual inspection.
e. Tighten main bearing cap sub bolt (M9) to 30 degrees clockwise
in order of 11 to 20. (Angle tightening)
f. Tighten side bolt (M10) in order of 21 to 30.
After installing main bearing cap bolts, make sure that crankshaft can be rotated smoothly.
Check the crankshaft end play. Refer to EM-266, "CRANKSHAFT END PLAY" .
g. Install cover of cylinder block rear left side (next to the starter motor housing).
8. Install new rear oil seal on rear oil seal retainer.
Install new rear oil seal so that each seal lip is oriented as
shown in the figure.
Install rear oil seal to rear oil seal retainer with rear oil seal
drift (commercial service tool).
Tap until flattened with front edge of rear oil seal retainer. Do
not damage or scratch outer circumference of oil seal.
Make sure the garter spring is in position and seal lips not
inverted.
9. Install rear oil seal retainer.
Apply new engine oil to both oil seal lip and dust seal lip.: 39.2 Nꞏm (4.0 kg-m, 29 ft-lb)
: 29.4 Nꞏm (3.0 kg-m, 22 ft-lb)
PBIC0090E
PBIC0096E
: 49 Nꞏm (5.0 kg-m, 36 ft-lb)
SEM715A
Rear oil seal drift
Outer diameter : 102 mm (4.02 in)
Inner diameter : 86 mm (3.39 in)
PBIC0097E

CYLINDER BLOCK
EM-257
[VK45DE]
C
D
E
F
G
H
I
J
K
L
MA
EM
Revision: 2006 January2006 M35/M45
Apply a continuous bead of liquid gasket with tube presser
[SST: WS39930000 ( — )] to rear oil seal retainer as
shown in the figure.
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-48, "
RECOMMENDED CHEMICAL PRODUCTS AND
SEALANTS".
10. Install piston to connecting rod.
a. Using snap ring pliers, install new snap ring to the groove of the piston rear side.
Insert it fully into groove to install.
b. Install piston to connecting rod.
Using industrial use drier or similar tool, heat piston until piston pin can be pushed in by hand without
excess force [approx. 60 to 70
C (140 to 158F)]. From the front to the rear, insert piston pin into piston
and connecting rod.
Assemble so that the front mark on the piston head and the oil
holes and the cylinder No. on connecting rod are positioned
as shown in the figure.
c. Using snap ring pliers, install new snap rings to the groove of the
piston front side.
Insert it fully into groove to install.
After installing, make sure that connecting rod moves
smoothly.
11. Using piston ring expander (commercial service tool), install pis-
ton rings.
CAUTION:
When installing piston rings, be careful not to damage
piston.
Be careful not to damage piston rings by expending them
excessively.
Position each ring with the gap as shown in the figure, refer-
ring to the piston front mark.
Install top ring and second ring with the stamped surface fac-
ing upward.
12. Install connecting rod bearings to connecting rod and connecting rod bearing cap.
Before installing connecting rod bearings, apply engine oil to the bearing surface (inside). Do not apply
engine oil to the back surface, but thoroughly clean it.
SBIA0391E
PBIC0099E
PBIC0087E
Stamped mark
To p r i n g : R
Second ring : 2R
PBIC0100E

CYLINDER BLOCK
EM-259
[VK45DE]
C
D
E
F
G
H
I
J
K
L
MA
EM
Revision: 2006 January2006 M35/M45
16. Install knock sensor.
Install it with its connector facing the rear of engine.
Install the sub-harness with its shorter branch line to the right
bank.
CAUTION:
Do not tighten mounting bolts while holding connector.
If any impact by dropping is applied to knock sensor,
replace it with new one.
NOTE:
Make sure that there is no foreign material on the cylinder
block mating surface and the back surface of knock sensor.
Make sure that knock sensor does not interfere with other parts.
17. Note the following, and assemble in the reverse order of disassembly after this step.
Drive plate
When installing drive plate to crankshaft, be sure to correctly
align crankshaft side guide pin and drive plate side guide pin
hole.
CAUTION:
If these are not aligned correctly, engine runs roughly
and “MIL” turns on.
Install drive plate, reinforcement plate and pilot converter (if
not installed in step 4) as shown in the figure.
Face chamfered or rounded edge side to crankshaft.
Holding ring gear with ring gear stopper [SST: J-45476].
Tighten mounting bolts crosswise over several times.
When install pilot converter, using drift [outer diameter:
approx. 35 mm (1.38 in)]. Press-fit as far as it will go.
How to Select Piston and Bearing NBS004PO
DESCRIPTION
PBIC0105E
PBIC0106E
PBIC1965E
Selection points Selection parts Selection items Selection methods
Between cylinder block and
crankshaftMain bearingMain bearing grade
(bearing thickness)Determined by match of cylin-
der block bearing housing
grade (inner diameter of hous-
ing) and crankshaft journal
grade (outer diameter of jour-
nal)
Between crankshaft and con-
necting rodConnecting rod bearingConnecting rod bearing grade
(bearing thickness)Combining service grades for
connecting rod big end diame-
ter and crankshaft pin outer
diameter determine connecting
rod bearing selection.
Between cylinder block and pis-
tonPiston and piston pin assembly
(Piston is available together
with piston pin as assembly.)Piston grade
(piston skirt diameter)Piston grade = cylinder bore
grade (inner diameter of bore)
Between piston and connecting
rod*———

EM-260
[VK45DE]
CYLINDER BLOCK
Revision: 2006 January2006 M35/M45
*: For the service parts, the grade for fitting cannot be selected between piston pin and connecting rod. (Only “0” grade is available.) The
information at the shipment from the plant is described as a reference.
The identification grade stamped on each part is the grade for the dimension measured in new condition.
This grade cannot apply to reused parts.
For reused or repaired parts, measure the dimension accurately. Determine the grade by comparing the
measurement with the values of each selection table.
For details of the measurement method of each part, the reuse standards, and the selection method of the
selective fitting parts, refer to the text.
HOW TO SELECT PISTON
When New Cylinder Block is Used
Check the cylinder bore grade (“1”, “2” or “3”) on the rear upper side
between cylinder block banks, and select piston of the same grade.
NOTE:
Piston is available with piston pin as a set for the service part. (Only
“0” grade piston pin is available.)
When Cylinder Block is Reused
1. Measure the cylinder bore inner diameter. Refer to EM-270, "Cylinder Bore Inner Diameter" .
2. Determine the bore grade by comparing the measurement with the values the “Cylinder bore inner diame-
ter” of the “Piston Selection Table”. Select piston of the same grade.
Piston Selection Table
Unit: mm (in)
NOTE:
Piston is available together with piston pin as assembly.
Piston pin (piston pin hole) grade is provided only for the parts installed at the plant. For service parts, no
piston pin grades can be selected. (Only “0” grade is available.)
No second grade mark is available on piston.
PBIC2371E
PBIC2372E
Grade 1 2 (or no mark) 3
Cylinder bore inner diameter93.000 - 93.010
(3.6614 - 3.6618)93.010 - 93.020
(3.6618 - 3.6622)93.020 - 93.030
(3.6622 - 3.6626)
Piston skirt diameter92.980 - 92.990
(3.6606 - 3.6610)92.990 - 93.000
(3.6610 - 3.6614)93.000 - 93.010
(3.6614 - 3.6618)