INFINITI M35 2006 Factory Service Manual

EM-268
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CYLINDER BLOCK
Revision: 2006 January2006 M35/M45
CONNECTING ROD BEND AND TORSION
Check with connecting rod aligner.
If it exceeds the limit, replace connecting rod assembly.
CONNECTING ROD BIG END DIAMETER
Install connecting rod bearing cap without installing connecting
rod bearing, and tightening connecting rod bolts to the specified
torque. Refer to EM-254, "
ASSEMBLY" for the tightening proce-
dure.
Measure the inner diameter of connecting rod big end with
inside micrometer.
If out of the standard, replace connecting rod assembly.
CONNECTING ROD BUSHING OIL CLEARANCE
Connecting Rod Bushing Inner Diameter
Measure the inner diameter of connecting rod bushing with inside
micrometer.Bend:
Limit : 0.15 mm (0.0059 in) per 100 mm (3.94 in) length
To r s i o n :
Limit : 0.30 mm (0.012 in) per 100 mm (3.94 in) length
PBIC2077E
Standard : 55.000 - 55.013 mm (2.1654 - 2.1659 in)
PBIC1641E
Standard : 22.000 - 22.012 mm (0.8661 - 0.8666 in)
PBIC0120E

CYLINDER BLOCK
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Piston Pin Outer Diameter
Measure the outer diameter of piston pin with micrometer.
Connecting Rod Bushing Oil Clearance
(Connecting rod bushing oil clearance) = (Connecting rod bushing inner diameter) – (Piston pin outer diame-
ter)
If the calculated value exceeds the limit, replace connecting rod assembly and/or piston and piston pin
assembly.
If replacing piston and piston pin assembly, refer to EM-260, "HOW TO SELECT PISTON" .
If replacing connecting rod assembly, refer to EM-273, "CON-
NECTING ROD BEARING OIL CLEARANCE" to select the con-
necting rod bearing.
Factory installed parts grading:
Service parts apply only to grade “0”.
Unit: mm (in)
*: After installing in connecting rod
CYLINDER BLOCK DISTORTION
Using scraper, remove gasket on the cylinder block surface, and also remove engine oil, scale, carbon, or
other contamination.
CAUTION:
Be careful not to allow gasket flakes to enter engine oil or engine coolant passages. Standard : 21.989 - 22.001 mm (0.8657 - 0.8662 in)
PBIC0117E
Standard : 0.005 - 0.017 mm (0.0002 - 0.0007 in)
Limit : 0.030 mm (0.0012 in)
PBIC2164E
Grade 0 1
Connecting rod bushing
inner diameter * 2 2.000 - 22.006
(0.8661 - 0.8664) 22.006 - 22.012
(0.8664 - 0.8666)
Piston pin hole diameter 21.993 - 21.999
(0.8659- 0.8661) 21.999 - 22.005
(0.8661 - 0.8663)
Piston pin outer diameter 21.989 - 21.995
(0.8657 - 0.8659) 21.995 - 22. 001
(0.8659 - 0.8662)
PBIC2372E

EM-270
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CYLINDER BLOCK
Revision: 2006 January2006 M35/M45
Measure the distortion on the cylinder block upper face at some
different points in six directions with straightedge and feeler
gauge.
If it exceeds the limit, replace cylinder block.
MAIN BEARING HOUSING INNER DIAMETER
Install main bearing caps and main bearing without installing
main bearings, and tighten main bearing cap bolts to the speci-
fied torque. Refer to EM-254, "
ASSEMBLY" for the tightening
procedure.
Measure the inner diameter of main bearing housing with bore
gauge.
If out of the standard, replace cylinder block and main bearing
caps as assembly.
NOTE:
Cylinder block cannot be replaced as a single part, because it is
machined together with main bearing caps.
PISTON TO CYLINDER BORE CLEARANCE
Cylinder Bore Inner Diameter
Using bore gauge, measure cylinder bore for wear, out-of-round
and taper at six different points on each cylinder. (“X” and “Y”
directions at “A”, “B” and “C”) (“X” is in longitudinal direction of
engine)
If the measured value exceeds the limit, or if there are scratches
and/or seizure on the cylinder inner wall, hone or re-bore the
inner wall.
Oversize piston is provided. When using oversize piston, re-
bore cylinder so that the clearance of the piston-to-cylinder bore
satisfies the standard.
CAUTION:
When using oversize piston, use oversize pistons for all
cylinders with oversize piston rings.Limit : 0.1 mm (0.004 in)
SEM123C
Standard : 68.944 - 68.968 mm (2.7143 - 2.7153 in)
PBIC1643E
Standard inner diameter:
93.000 - 93.030 mm (3.6614 - 3.6626 in)
Wear limit:
0.2 mm (0.008 in)
Out-of-round (Difference between “X” and “Y”):
0.015 mm (0.0006 in)
Taper limit (Difference between “A” and “C”):
0.01 mm (0.0004 in)
Oversize (OS) : 0.2 mm (0.008 in)
PBIC3827E
PBIC0124E

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Piston Skirt Diameter
Measure the outer diameter of piston skirt with micrometer.
Measure point “H” (Distance from the top): 42 mm (1.65 in)
Piston to Cylinder Bore Clearance
Calculate by piston skirt diameter and cylinder bore inner diameter (direction “Y”, position “B”).
(Clearance) = (Cylinder bore inner diameter) – (Piston skirt diameter).
If the calculated value exceeds the limit, replace piston and piston pin assembly. Refer to EM-260, "HOW
TO SELECT PISTON" .
Re-boring Cylinder Bore
1. Cylinder bore size is determined by adding piston to cylinder bore clearance to piston skirt diameter.
2. Install main bearing caps and main bearing, and tighten to the specified torque. Otherwise, cylinder bores
may be distorted in final assembly.
3. Cut cylinder bores.
NOTE:
When any cylinder needs boring, all other cylinders must also be bored.
Do not cut too much out of cylinder bore at a time. Cut only 0.05 mm (0.0020 in) or so in diameter at a
time.
4. Hone cylinders to obtain the specified piston to cylinder bore clearance.
5. Measure finished cylinder bore for the out-of-round and taper.
NOTE:
Measurement should be done after cylinder bore cools down.
CRANKSHAFT MAIN JOURNAL DIAMETER
Measure the outer diameter of crankshaft main journals with micrometer. Standard
: 92.980 - 93.010 mm (3.6606 - 3.6618 in)
PBIC0125E
PBIC0126E
Standard : 0.010 - 0.030 mm (0.0004 - 0.0012 in)
Limit : 0.08 mm (0.0031 in)
Re-bored size calculation: D = A + B – C
where,
D: Bored diameter
A: Piston skirt diameter as measured
B: Piston to cylinder bore clearance (standard value)
C: Honing allowance 0.02 mm (0.0008 in)

EM-272
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CYLINDER BLOCK
Revision: 2006 January2006 M35/M45
If out of the standard, measure the main bearing oil clearance. Then use undersize bearing. Refer to EM-
274, "MAIN BEARING OIL CLEARANCE" .
CRANKSHAFT PIN JOURNAL DIAMETER
Measure the outer diameter of crankshaft pin journal with
micrometer.
If out of the standard, measure the connecting rod bearing oil
clearance. Then use undersize bearing. Refer to EM-273,
"CONNECTING ROD BEARING OIL CLEARANCE" .
CRANKSHAFT OUT-OF-ROUND AND TAPER
Measure the dimensions at four different points as shown in the
figure on each main journal and pin journal with micrometer.
Out-of-round is indicated by the difference in the dimensions
between “X” and “Y” at “A” and “B”.
Taper is indicated by the difference in the dimensions between
“A” and “B” at “X” and “Y”.
If the measured value exceeds the limit, correct or replace crankshaft.
If corrected, measure the bearing oil clearance of the corrected main journal and/or pin journal. Then
select the main bearing and/or connecting rod bearing. Refer to EM-274, "
MAIN BEARING OIL CLEAR-
ANCE" and/or EM-273, "CONNECTING ROD BEARING OIL CLEARANCE" .
CRANKSHAFT RUNOUT
Place V-block on precise flat table, and support the journals on
the both end of crankshaft.
Place dial indicator straight up on the No. 3 journal.
While rotating crankshaft, read the movement of the pointer on
dial indicator (total indicator reading).
If it exceeds the limit, replace crankshaft.Standard : 63.940 - 63.964 mm (2.5173 - 2.5183 in) dia.
Standard : 51.956 - 51.974 mm (2.0455 - 2.0462 in) dia.
PBIC0127E
Limit:
Out-of-round (Difference between “X” and “Y”)
: 0.015 mm (0.0006 in)
Taper (Difference between “A” and “B”)
: 0.010 mm (0.0004 in)
PBIC1685E
Standard : Less than 0.05 mm (0.002 in)
Limit : 0.10 mm (0.004 in)
PBIC2378E

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Revision: 2006 January2006 M35/M45
CONNECTING ROD BEARING OIL CLEARANCE
Method by Calculation
Install connecting rod bearings to connecting rod and cap, and
tighten connecting rod bolts to the specified torque. Refer to
EM-254, "
ASSEMBLY" for the tightening procedure.
Measure the inner diameter of connecting rod bearing with
inside micrometer.
(Bearing oil clearance) = (Connecting rod bearing inner diameter) –
(Crankshaft pin journal diameter)
If the calculated value exceeds the limit, select proper connecting rod bearing according to connecting rod
big end diameter and crankshaft pin journal diameter to obtain the specified bearing oil clearance. Refer
to EM-261, "
HOW TO SELECT CONNECTING ROD BEARING" .
Method of Using Plastigage
Remove oil and dust on crankshaft pin journal and the surfaces of each bearing completely.
Cut plastigage slightly shorter than the bearing width, and place it in crankshaft axial direction, avoiding oil
holes.
Install connecting rod bearings to connecting rod and cap, and tighten connecting rod bolts to the speci-
fied torque. Refer to EM-254, "
ASSEMBLY" for the tightening procedure.
CAUTION:
Do not rotate crankshaft.
Remove connecting rod bearing cap and bearing, and using
scale on plastigage bag, measure the plastigage width.
NOTE:
The procedure when the measured value exceeds the limit is
same as that described in the “Method by Calculation”.Standard : 0.020 - 0.045 mm (0.0008 - 0.0018 in)
(actual clearance)
Limit : 0.055 mm (0.0022 in)
PBIC1642E
PBIC1149E

EM-274
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CYLINDER BLOCK
Revision: 2006 January2006 M35/M45
MAIN BEARING OIL CLEARANCE
Method by Calculation
Install main bearings to cylinder block and main bearing caps,
and tighten main bearing cap bolts with main bearing to the
specified torque. Refer to EM-254, "
ASSEMBLY" for the tighten-
ing procedure.
Measure the inner diameter of main bearing with bore gauge.
(Bearing clearance) = (Main bearing inner diameter) – (Crankshaft main journal diameter)
If the calculated value exceeds the limit, select proper main bearing according to main bearing inner diam-
eter and crankshaft main journal diameter to obtain the specified bearing oil clearance. Refer to EM-262,
"HOW TO SELECT MAIN BEARING" .
Method of Using Plastigage
Remove oil and dust on crankshaft main journal and the surfaces of each bearing completely.
Cut plastigage slightly shorter than the bearing width, and place it in crankshaft axial direction, avoiding oil
holes.
Install main bearings to cylinder block and main bearing caps, and tighten main bearing bolts with main
bearing to the specified torque. Refer to EM-254, "
ASSEMBLY" for the tightening procedure.
CAUTION:
Do not rotate crankshaft.
Remove main bearing caps and bearings, and using scale on
plastigage bag, measure the plastigage width.
NOTE:
The procedure when the measured value exceeds the limit is
same as that described in the “Method by Calculation”.
PBIC1644E
Standard
No . 1 and 5 journal : 0.001 - 0.011 mm (0.00004 - 0.0004 in)
No. 2, 3 and 4 journal : 0.007 - 0.017 mm (0.0003 - 0.0007 in)
Limit
No. 1 and 5 journal : 0.021 mm (0.0008 in)
No. 2, 3 and 4 journal : 0.027 mm (0.0011 in)
PBIC1149E

CYLINDER BLOCK
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Revision: 2006 January2006 M35/M45
CRUSH HEIGHT OF MAIN BEARING
When main bearing cap is removed after being tightened to the
specified torque with main bearings installed, the tip end of bear-
ing must protrude. Refer to EM-254, "
ASSEMBLY" for the tight-
ening procedure.
If the standard is not met, replace main bearings.
CRUSH HEIGHT OF CONNECTING ROD BEARING
When connecting rod bearing cap is removed after being tight-
ened to the specified torque with connecting rod bearings
installed, the tip end of bearing must protrude. Refer to EM-254,
"ASSEMBLY" for the tightening procedure.
If the standard is not met, replace connecting rod bearings.
DRIVE PLATE
Check drive plate and signal plate for deformation or cracks.
CAUTION:
Do not disassemble drive plate.
Do not place drive plate with signal plate facing down.
When handling signal plate, take care not to damage or
scratch it.
Handle signal plate in a manner that prevents it from
becoming magnetized.
If anything is found, replace drive plate.Standard : There must be crush height.
SEM502G
Standard : There must be crush height.
PBIC1646E
PBIC2367E

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SERVICE DATA AND SPECIFICATIONS (SDS)
Revision: 2006 January2006 M35/M45
SERVICE DATA AND SPECIFICATIONS (SDS)PFP:00030
Standard and LimitNBS004PQ
GENERAL SPECIFICATIONS
DRIVE BELTS
INTAKE MANIFOLD AND EXHAUST MANIFOLD
Unit: mm (in) Cylinder arrangementV-8
Displacement cm
3 (cu in)4,494 (274.22)
Bore and stroke mm (in)93 x 82.7 (3.66 x 3.256)
Valve arrangementDOHC
Firing order1-8-7-3-6-5-4-2
Number of piston ringsCompression 2
Oil 1
Number of main bearings5
Compression ratio10.5
Compression pressure
kPa (kg/cm
2 , psi)/300 rpmStandard 1,320 (13.5, 191)
Minimum 1,130 (11.5, 164)
Differential limit
between cylinders98 (1.0, 14)
Cylinder number
Va l v e t i m i n g
Unit: degree
abcde f
228 240 -2 62 4 44
SEM957C
PBIC0187E
Tension of drive belts Auto adjustment by auto tensioner
Items Limit
Surface distortionIntake manifold (upper) 0.1 (0.004)
Intake manifold (lower) 0.1 (0.004)
Exhaust manifold 0.3 (0.012)

SERVICE DATA AND SPECIFICATIONS (SDS)
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SPARK PLUG
Unit: mm (in)
CAMSHAFT AND CAMSHAFT BEARING
Unit: mm (in)
*: Total indicator reading
Va l v e L i f t e r
Unit: mm (in)
Valve Clearance
Unit: mm (in)
*: Approximately 80
C (176F) MakeNGK
Standard typePLFR5A-11
Hot typePLFR4A-11
Cold typePLFR6A-11
Gap (Nominal)1.1 (0.043)
ItemsStandard Limit
Camshaft journal clearanceNo. 1 0.045 - 0.083 (0.0018 - 0.0033) —
No. 2, 3, 4, 5 0.030 - 0.068 (0.0012 - 0.0027) —
Camshaft journal diameterNo. 1 25.938 - 25.955 (1.0212 - 1.0218) —
No. 2, 3, 4, 5 25.953 - 25.970 (1.0218 - 1.0224) —
Camshaft bracket inner diameter 26.000 - 26.021 (1.0236 - 1.0244)—
Camshaft end play 0.115 - 0.188 (0.0045 - 0.0074) —
Cam height “A”Intake 44.865 - 45.055 (1.7663 - 1.7738) 0.2 (0.008)
Exhaust 43.925 - 44.115 (1.7293 - 1.7368) 0.2 (0.008)
Camshaft runout [TIR*] 0.02 (0.001) 0.05 (0.002)
Camshaft sprocket runout [TIR*] — 0.15 (0.059)
SEM671
ItemsStandard
Valve lifter outer diameter 33.965 - 33.975 (1.3372 - 1.3776)
Valve lifter hole diameter 34.000 - 34.016 (1.3386 - 1.3392)
Valve lifter clearance 0.025 - 0.051 (0.0010 - 0.0020)
Items Cold Hot* (reference data)
Intake 0.26 - 0.34 (0.010 - 0.013) 0.304 -0.416 (0.012 - 0.016)
Exhaust 0.29 - 0.37 (0.011 - 0.015) 0.308 - 0.432 (0.012 - 0.017)