2006 INFINITI M35 Oil

CYLINDER BLOCK
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Revision: 2006 January2006 M35/M45
c. Install main bearings paying attention to the direction.
Main bearing with oil hole and groove goes on cylinder block.
The one without them goes on main bearing cap.
Before installing main bearings, apply engine oil to the bear-
ing surface (inside). Do not apply engine oil to the back sur-
face, but thoroughly clean it.
When installing, align main bearing stopper protrusion to cut-
out of cylinder block and main bearing caps.
Ensure the oil holes on cylinder block and those on the corre-
sponding bearing are aligned.
4. Install pilot converter to crankshaft, if removed.
With drift [outer diameter: approx. 35 mm (1.38 in)], press-fit
as far as it will go.
Press-fit pilot converter with its chamfering side facing crank-
shaft as shown in the figure.
It is possible to remove pilot converter without hoisting engine
with engine stand.
5. Install crankshaft to cylinder block.
While turning crankshaft by hand, make sure it turns smoothly.
6. Install main bearing caps.
Align the identification number to the journal position to install.
Install the upper side of the identification number facing the
front of engine. (The number shall be read correctly from the
rear of engine.)
Using plastic hammer or similar tool, tap them lightly to seat
them on the installation position.
NOTE:
Main bearing cap cannot be replaced as a single parts, because
it is machined together with cylinder block.
PBIC2369E
EMP0569D
SEM537E
PBIC0095E

EM-256
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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
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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

EM-258
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CYLINDER BLOCK
Revision: 2006 January2006 M35/M45
When installing, align the connecting rod bearing stopper pro-
trusion with the cutout of connecting rod and connecting rod
bearing cap to install.
Ensure the oil holes on connecting rod and that on the corre-
sponding bearing are aligned.
13. Install piston and connecting rod assembly to crankshaft.
Position the crankshaft pin corresponding to connecting rod to be installed onto the bottom dead center.
Apply engine oil sufficiently to the cylinder bore, piston and crankshaft pin journal.
Match the cylinder position with the cylinder No. on connecting rod to install.
Be sure that front mark on piston head is facing front of engine.
Using piston ring compressor [SST: EM03470000 (J8037)],
install piston with the front mark on the piston head facing the
front of engine.
CAUTION:
Be careful not to damage cylinder wall and crankshaft pin,
resulting from an interference of the connecting rod big
end.
14. Install connecting rod bearing cap.
Match the stamped cylinder number marks on connecting rod
with those on cap to install.
15. Tighten connecting rod nuts as follows:
a. Apply new engine oil to the threads and seats of connecting rod bolts and nuts.
b. Tighten connecting rod nuts.
c. Then tighten all connecting rod nuts 60 degrees clockwise.
(Angle tightening)
CAUTION:
Use angle wrench (SST) to check tightening angle. Do not
make judgment by visual inspection.
After tightening connecting rod nuts, make sure that crank-
shaft rotates smoothly.
Check the connecting rod side clearance. Refer to EM-266,
"CONNECTING ROD SIDE CLEARANCE" .
PBIC2370E
PBIC0102E
PBIC2164E
: 14.7 Nꞏm (1.5 kg-m, 11 ft-lb)
PBIC0104E

CYLINDER BLOCK
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Revision: 2006 January2006 M35/M45
HOW TO SELECT CONNECTING ROD BEARING
When New Connecting Rod and Crankshaft are Used
Check pin diameter grade (“0”, “1” or “2”) on front of crankshaft, and
select connecting rod bearing of the same grade.
NOTE:
There is no grading for connecting rod big end diameter.
When Crankshaft and Connecting Rod are Reused
1. Measure the connecting rod big end diameter. Refer to EM-268, "CONNECTING ROD BIG END DIAME-
TER" .
2. Make sure that the connecting rod big end diameter is within the standard value.
3. Measure the crankshaft pin journal diameter. Refer to EM-272, "
CRANKSHAFT PIN JOURNAL DIAME-
TER" .
4. Determine the grade of crankshaft pin diameter grade by corresponding to the measured dimension in
“Crankshaft pin journal diameter” column of “Connecting Rod Bearing Selection Table”.
5. Select connecting rod bearing of the same grade.
Connecting Rod Bearing Selection Table
Unit: mm (in)
Unit: mm (in)
Under Size Bearings Usage Guide
When the specified connecting rod bearing oil clearance is not obtained with standard size connecting rod
bearings, use undersize (US) bearings.
When using undersize (US) bearing, measure the connecting rod bearing inner diameter with bearing
installed, and grind crankshaft pin so that the connecting rod bearing oil clearance satisfies the standard.
CAUTION:
In grinding crankshaft pin to use undersize bearings, keep
the fillet R [1.5 mm (0.059 in)].
Bearing undersize table
Unit: mm (in)
PBIC2374E
Connecting rod big end diameter 55.000 - 55.013 (2.1654 - 2.1659)
Crankshaft Connecting rod bearing
Crankshaft pin journal diameter Grade (Mark) Dimension (Bearing thickness range) Bearing grade No. Color
51.968 - 51.974 (2.0460 - 2.0462) 0 1.500 - 1.503 (0.0591 - 0.0592) STD 0 No color
51.962 - 51.968 (2.0457 - 2.0460) 1 1.503 - 1.506 (0.0592 - 0.0593) STD 1 Brown
51.956 - 51.962 (2.0455 - 2.0457) 2 1.506 - 1.509 (0.0593 - 0.0594) STD 2 Green
PBIC2373E
Size Thickness
US 0.25 (0.0098) 1.626 - 1.634 (0.0640 - 0.0643)

CYLINDER BLOCK
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Revision: 2006 January2006 M35/M45
Main Bearing Grade Table (All Journals)
Unit: mm (in)
Use Undersize Bearing Usage Guide
When the specified main bearing oil clearance is not obtained with standard size main bearings, use
underside (US) bearing.
When using undersize (US) bearing, measure the main bearing inner diameter with bearing installed, and
grind main journal so that the main bearing oil clearance satisfies the standard.
CAUTION:
In grinding crankshaft main journal to use undersize bear-
ings, keep the fillet R [1.5 mm (0.059 in)].
Bearing undersize table
Unit: mm (in) Grade number Thickness Identification color Remarks
0 2.483 - 2.486 (0.0978 - 0.0979) Black
Grade and color are the same
for upper and lower bearings. 1 2.486 - 2.489 (0.0979 - 0.0980) Brown
2 2.489 - 2.492 (0.0980 - 0.0981) Green
3 2.492 - 2.495 (0.0981 - 0.0982) Yellow
4 2.495 - 2.498 (0.0982 - 0.0983) Blue
5 2.498 - 2.501 (0.0983 - 0.0985) Pink
6 2.501 - 2.504 (0.0985 - 0.0986) Purple
7 2.504 - 2.507 (0.0986 - 0.0987) White
8 2.507 - 2.510 (0.0987 - 0.0988) Red
01UPR 2.483 - 2.486 (0.0978 - 0.0979) Black
Grade and color are different
for upper and lower bearings. LWR 2.486 - 2.489 (0.0979 - 0.0980) Brown
12UPR 2.486 - 2.489 (0.0979 - 0.0980) Brown
LWR 2.489 - 2.492 (0.0980 - 0.0981) Green
23UPR 2.489 - 2.492 (0.0980 - 0.0981) Green
LWR 2.492 - 2.495 (0.0981 - 0.0982) Yellow
34UPR 2.492 - 2.495 (0.0981 - 0.0982) Yellow
LWR 2.495 - 2.498 (0.0982 - 0.0983) Blue
45UPR 2.495 - 2.498 (0.0982 - 0.0983) Blue
LWR 2.498 - 2.501 (0.0983 - 0.0985) Pink
56UPR 2.498 - 2.501 (0.0983 - 0.0985) Pink
LWR 2.501 - 2.504 (0.0985 - 0.0986) Purple
67UPR 2.501 - 2.504 (0.0985 - 0.0986) Purple
LWR 2.504 - 2.507 (0.0986 - 0.0987) White
78UPR 2.504 - 2.507 (0.0986 - 0.0987) White
LWR 2.507 - 2.510 (0.0987 - 0.0988) Red
PBIC2373E
Size Thickness
US 0.25 (0.0098) 2.618 - 2.626 (0.1031 - 0.1034)

EM-266
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CYLINDER BLOCK
Revision: 2006 January2006 M35/M45
Inspection after DisassemblyNBS004PP
CRANKSHAFT END PLAY
Measure the clearance between thrust bearings and crankshaft
arm when crankshaft is moved fully forward or backward with
dial indicator.
If the measured value exceeds the limit, replace thrust bearings,
and measure again. If it still exceeds the limit, replace crank-
shaft also.
CONNECTING ROD SIDE CLEARANCE
Measure the side clearance between connecting rod and crank-
shaft arm with feeler gauge.
If the measured value exceeds the limit, replace connecting rod,
and measure again. If it still exceeds the limit, replace crank-
shaft also.
PISTON TO PISTON PIN OIL CLEARANCE
Piston Pin Hole Diameter
Measure the inner diameter of piston pin hole with inside microme-
ter.
Piston Pin Outer Diameter
Measure the outer diameter of piston pin with micrometer.
Piston to Piston Pin Oil Clearance
(Piston to piston pin oil clearance) = (Piston pin hole diameter) – (Piston pin outer diameter)
If the calculated value is out of the standard, replace piston and piston pin assembly. Standard : 0.10 - 0.25 mm (0.0039 - 0.0098 in)
Limit : 0.30 mm (0.012 in)
PBIC2377E
Standard : 0.20 - 0.35 mm (0.0079 - 0.0138 in)
Limit : 0.40 mm (0.016 in)
PBIC0115E
Standard : 21.993 - 22.005 mm (0.8659 - 0.8663 in)
PBIC0116E
Standard : 21.989 - 22.001 mm (0.8657 - 0.8662 in)
PBIC0117E
Standard : 0.002 - 0.006 mm (0.0001 - 0.0002 in)

CYLINDER BLOCK
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Revision: 2006 January2006 M35/M45
When replacing piston and piston pin assembly, refer to EM-260, "HOW TO SELECT PISTON" .
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.)
PISTON RING SIDE CLEARANCE
Measure the side clearance of piston ring and piston ring groove
with feeler gauge.
If the measured value exceeds the limit, replace piston ring, and measure again. If it still exceeds the limit,
replace piston also.
PISTON RING END GAP
Make sure that the cylinder bore inner diameter is within the
specification. Refer to EM-270, "
Cylinder Bore Inner Diameter" .
Lubricate with new engine oil to piston and piston ring, and then
insert piston ring until middle of cylinder with piston, and mea-
sure the piston ring end gap with feeler gauge.
If the measured value exceeds the limit, replace piston ring, and measure again. If it still exceeds the limit,
re-bore cylinder and use oversize piston and piston rings.Standard:
Top ring : 0.045 - 0.080 mm (0.0018 - 0.0031 in)
2nd ring : 0.030 - 0.070 mm (0.0012 - 0.0028 in)
Oil ring : 0.065 - 0.135 mm (0.0026 - 0.0053 in)
Limit:

Top ring : 0.11 mm (0.0043 in)

2nd ring : 0.10 mm (0.004 in)
SEM024AA
Standard:
Top ring : 0.22 - 0.32 mm (0.0087 - 0.0126 in)
2nd ring : 0.22 - 0.32 mm (0.0087 - 0.0126 in)
Oil ring : 0.20 - 0.50 mm (0.008 - 0.020 in)
Limit:


Top ring : 0.56 mm (0.0220 in)


2nd ring : 0.56 mm (0.0220 in)
Oil ring : 0.96 mm (0.0378 in)
PBIC0118E