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VA LV E G U I D E
Unit: mm (in)
VA LV E S E AT
Unit: mm (in)
“b”
Intake
1.0 (0.039)
Exhaust
“c” Intake 2.1 - 2.8 (0.083 - 0.110)
Exhaust
2.3 - 3.0 (0.091 - 0.118)
“c ′ ” Intake
3.0 (0.118)
Exhaust –
Valve stem diameter “d ” Intake
4.965 - 4.980 (0.1955 - 0.1961)
Exhaust 4.955 - 4.970 (0.1951 - 0.1957)
Valve seat angle “ α” Intake
45°15 ′ - 45 °45 ′
Exhaust
Items StandardOversize (service) [0.2 (0.008)]
Valve guide Outer diameter
9.023 - 9.034 (0.3552 - 0.3557) 9.223 - 9.234 (0.3631 - 0.3635)
Inner diameter (Finished size) 5.000 - 5.018 (0.1969 - 0.1976)
Cylinder head valve guide hole diameter 8.975 - 8.996 (0.3533 - 0.3542) 9.175 - 9.196 (0.3612 - 0.3620)
Interference fit of valve guide 0.027 - 0.059 (0.0011 - 0.0023)
Items StandardLimit
Valve guide clearance Intake
0.020 - 0.053 (0.0008 - 0.0021)
0.1 (0.004)
Exhaust 0.030 - 0.063 (0.0012 - 0.0025)
Projection length “H” 11.4 - 11.8 (0.449 - 0.465)
PBIC2187E
ItemsStandardOversize (service) [0.5 (0.02)]
Cylinder head seat recess diameter “D” Intake 31.400 - 31.416 (1.2362 - 1.2368) 31.900 - 31.916 (1.2559 - 1.2565) Exhaust 25.900 - 25.916 (1.0197 - 1.0203) 26.400 - 26.416 (1.0394 - 1.0400)
PBIC2745E
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SERVICE DATA AND SPECIFICATIONS (SDS)
*1 : Diameter made by intersection point of conic angles α
1 and α2
*
2 : Diameter made by intersection point of conic angles α 2 and α3
*
3 : Machining data
VALVE SPRING
Cylinder BlockINFOID:0000000005930980
CYLINDER BLOCK
Valve seat outer diameter “d” Intake 31.497 - 31.513 (1.2400 - 1.2407) 31.997 - 32.013 (1.2597 - 1.2604)
Exhaust 25.997 - 26.013 (1.0235 - 1.0241) 26.497 - 26.513 (1.0432 - 1.0438)
Valve seat interference fit Intake
0.081 - 0.113 (0.0032 - 0.0044)
Exhaust
Diameter “d1”*
1 Intake 29.0 (1.142)
Exhaust
23.0 (0.906)
Diameter “d2”*
2Intake 30.6 - 30.8 (1.205 - 1.213)
Exhaust 24.9 - 25.1 (0.980 - 0.988)
Angle “ α1” Intake
60°
Exhaust 45°
Angle “ α2” Intake
89°45 ′ - 90 °15 ′
Exhaust
Angle “ α3” Intake
120°
Exhaust
Contacting width “W”*
3Intake 1.05 - 1.35 (0.0413 - 0.0531)
Exhaust 1.25 - 1.55 (0.0492 - 0.0610)
Height “h” Intake
6.0 (0.236) 5.45 (0.215)
Exhaust 5.43 (0.214)
Depth “H” 6.0 (0.236)
ItemsStandard
Free height 42.26 mm (1.6638 in)
Installation height 32.40 mm (1.2756 in)
Installation load 136 - 154 N (13.9 - 15.7 kg, 31 - 35 lb)
Height during valve open 23.96 mm (0.9433 in)
Load with valve open 262 - 296 N (26.7 - 30.2 kg, 59 - 67 lb)
Items Limit
Valve spring squareness 1.8 mm (0.071 in)
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Unit: mm (in)
AVAILABLE PISTON
Unit: mm (in)
Cylinder block top surface distortion
Limit 0.1 (0.004)
Cylinder bore inner diameter Standard78.000 - 78.015 (3.0709 - 3.0715)
Out-of-round Limit 0.015 (0.0006)
Ta p e r 0.010 (0.0004)
Cylinder block main bearing housing inner diameter grade Grade No. A
Grade No. B
Grade No. C
Grade No. D
Grade No. E
Grade No. F
Grade No. G
Grade No. H
Grade No. J
Grade No. K
Grade No. L
Grade No. M
Grade No. N
Grade No. P
Grade No. R
Grade No. S
Grade No. T
Grade No. U
Grade No. V
Grade No. W51.997 - 51.998 (2.0471 - 2.0472)
51.998 - 51.999 (2.0472 - 2.0472)
51.999 - 52.000 (2.0472 - 2.0472)
52.000 - 52.001 (2.0472 - 2.0473)
52.001 - 52.002 (2.0473 - 2.0473)
52.002 - 52.003 (2.0473 - 2.0474)
52.003 - 52.004 (2.0474 - 2.0474)
52.004 - 52.005 (2.0474 - 2.0474)
52.005 - 52.006 (2.0474 - 2.0475)
52.006 - 52.007 (2.0475 - 2.0475)
52.007 - 52.008 (2.0475 - 2.0476)
52.008 - 52.009 (2.0476 - 2.0476)
52.009 - 52.010 (2.0476 - 2.0476)
52.010 - 52.011 (2.0476 - 2.0477)
52.011 - 52.012 (2.0477 - 2.0477)
52.012 - 52.013 (2.0477 - 2.0478)
52.013 - 52.014 (2.0478 - 2.0478)
52.014 - 52.015 (2.0478 - 2.0478)
52.015 - 52.016 (2.0478 - 2.0479)
52.016 - 52.017 (2.0479 - 2.0479)
Difference in inner diameter between cylinders Standard Less than 0.015 (0.0006)
PBIC3924E
ItemStandardLimit
Piston skirt diameter “A”* 77.965 - 77.980 (3.0695 - 3.0701)—
Measure point “H” 37.1 (1.461)—
Piston pin hole diameter* 19.006 - 19.012 (0.7483 - 0.7485)—
Piston to cylinder bore clearance 0.020 - 0.050 (0.0008 - 0.0020)0.09 (0.0035)
PBIC0188E
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SERVICE DATA AND SPECIFICATIONS (SDS)
*: Always check with the Parts Department for the latest parts information
PISTON RING
Unit: mm (in)
PISTON PIN
Unit: mm (in)
CONNECTING ROD
Unit: mm (in)
*: Always check with the Parts Department for the latest parts information
CRANKSHAFT
Unit: mm (in)
Items
StandardLimit
Piston ring side clearance Top
0.040 - 0.080 (0.0016 - 0.0031) 0.11 (0.0043)
2nd 0.030 - 0.070 (0.0012 - 0.0028) 0.10 (0.0039)
Oil (rail ring) 0.045 - 0.125 (0.0018 - 0.0049) —
Piston ring end gap Top
0.20- 0.30 (0.0079 - 0.0118) 0.50 (0.0197)
2nd 0.35 - 0.50 (0.0138 - 0.0197) 0.66 (0.0260)
Oil (rail ring) 0.20 - 0.60 (0.0079 - 0.0236) 0.92 (0.0362)
Piston pin outer diameter 18.996 - 19.002 (0.7479 - 0.7481)
Piston to piston pin oil clearance Standard0.008 - 0.012 (0.0003 - 0.0005)
Center distance 129.84 - 129.94 (5.11 - 5.12)
Bend [per 100 (3.94)] Limit 0.15 (0.0059)
Torsion [per 100 (3.94)] Limit 0.30 (0.0118)
Connecting rod small end clearance Standard –0.018 - –0.044 (–0.0007 - –0.0017)
Connecting rod small end inner diameter Standard 18.958 - 18.978 (0.7464 - 0.7472)
Connecting rod side clearance Standard0.200 - 0.352 (0.0079 - 0.0139)
Connecting rod big end diameter Grade*
Dimension
Grade No. A
Grade No. B
Grade No. C
Grade No. D
Grade No. E
Grade No. F
Grade No. G
Grade No. H
Grade No. J
Grade No. K
Grade No. L
Grade No. M
Grade No. N 43.000 - 43.001 (1.6929 - 1.6929)
43.001 - 43.002 (1.6929 - 1.6930)
43.002 - 43.003 (1.6930 - 1.6930)
43.003 - 43.004 (1 6930 - 1.6931)
43.004 - 43.005 (1.6931 - 1.6931)
43.005 - 43.006 (1.6931 - 1.6931)
43.006 - 43.007 (1.6931 - 1.6932)
43.007 - 43.008 (1.6932 - 1.6932)
43.008 - 43.009 (1.6932 - 1.6933)
43.009 - 43.010 (1.6933 - 1.6933)
43.010 - 43.011 (1.6933 - 1.6933)
43.011 - 43.012 (1.6933 - 1.6934)
43.012 - 43.013 (1.6934 - 1.6934)
Center distance “r” 41.68 - 41.76 (1.6409 - 1.6441)
SEM645PBIC3459J
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1: Total indicator reading
2: Always check with the Parts Department for the latest parts information
Connecting Rod BearingINFOID:0000000005930981
CONNECTING ROD BEARING GRADE TABLE
Unit: mm (in)
Out-of-round
Limit0.003 (0.0001)
Taper Limit0.004 (0.0002)
Runout [TIR
1] Limit
0.10 (0.0039)
Crankshaft end play Standard
0.098 - 0.260 (0.0039 - 0.0102)
Limit 0.35 (0.0138)
Crankshaft pin journal diameter grade. “Dp” Grade
2Dimension
Grade No. A
Grade No. B
Grade No. C
Grade No. D
Grade No. E
Grade No. F
Grade No. G
Grade No. H
Grade No. J
Grade No. K
Grade No. L
Grade No. M
Grade No. N
Grade No. P
Grade No. R
Grade No. S
Grade No. T
Grade No. U 39.971 - 39.970 (1.5737 - 1.5736)
39.970 - 39.969 (1.5736 - 1.5736)
39.969 - 39.968 (1.5736 - 1.5735)
39.968 - 39.967 (1.5735 - 1.5735)
39.967 - 39.966 (1.5735 - 1.5735)
39.966 - 39.965 (1.5735 - 1.5734)
39.965 - 39.964 (1.5734 - 1.5734)
39.964 - 39.963 (1.5734 - 1.5733)
39.963 - 39.962 (1.5733 - 1.5733)
39.962 - 39.961 (1.5733 - 1.5733)
39.961 - 39.960 (1.5733 - 1.5732)
39.960 - 39.959 (1.5732 - 1.5732)
39.959 - 39.958 (1.5732 - 1.5731)
39.958 - 39.957 (1.5731 - 1.5731)
39.957 - 39.956 (1.5731 - 1.5731)
39.956 - 39.955 (1.5731 - 1.5730)
39.955 - 39.954 (1.5730 - 1.5730)
39.954 - 39.953 (1.5730 - 1.5729)
Crankshaft main journal diameter grade. “Dm” Grade No. A
Grade No. B
Grade No. C
Grade No. D
Grade No. E
Grade No. F
Grade No. G
Grade No. H
Grade No. J
Grade No. K
Grade No. L
Grade No. M
Grade No. N
Grade No. P
Grade No. R
Grade No. S
Grade No. T
Grade No. U
Grade No. V
Grade No. W47.979 - 47.978 (1.8889 - 1.8889)
47.978 - 47.977 (1.8889 - 1.8889)
47.977 - 47.976 (1.8889 - 1.8888)
47.976 - 47.975 (1.8888 - 1.8888)
47.975 - 47.974 (1.8888 - 1.8887)
47.974 - 47.973 (1.8887 - 1.8887)
47.973 - 47.972 (1.8887 - 1.8887)
47.972 - 47.971 (1.8887 - 1.8886)
47.971 - 47.970 (1.8886 - 1.8886)
47.970 - 47.969 (1.8886 - 1.8885)
47.969 - 47.968 (1.8885 - 1.8885)
47.968 - 47.967 (1.8885 - 1.8885)
47.967 - 47.966 (1.8885 - 1.8884)
47.966 - 47.965 (1.8884 - 1.8884)
47.995 - 47.964 (1.8884 - 1.8883)
47.994 - 47.963 (1.8883 - 1.8883)
47.963 - 47.962 (1.8883 - 1.8883)
47.962 - 47.961 (1.8883 - 1.8882)
47.961 - 47.960 (1.8882 - 1.8882)
47.960 - 47.959 (1.8882 - 1.8881)
Grade number*
Thickness Identification color Remarks
0 1.498 - 1.501 (0.0590 - 0.0591) Black
Grade and color are the same
for upper and lower bearings.
1
1.501 - 1.504 (0.0591 - 0.0592) Brown
2 1.504 - 1.507 (0.0592 - 0.0593) Green
3 1.507 - 1.510 (0.0593 - 0.0594) Yellow
4 1.510 - 1.513 (0.0594 - 0.0596) Blue
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SERVICE DATA AND SPECIFICATIONS (SDS)
*: Always check with the Parts Department for the latest parts information
UNDERSIZE TABLE
Unit: mm (in)
CONNECTING ROD BEARING OIL CLEARANCE
Unit: mm (in)
Main BearingINFOID:0000000005930982
MAIN BEARING GRADE TABLE
Unit: mm (in)
01UPR 1.498 - 1.501 (0.0590 - 0.0591)
Black
Grade and color are different
for upper and lower bearings.
LWR 1.501 - 1.504 (0.0591 - 0.0592)
Brown
12 UPR 1.501 - 1.504 (0.0591 - 0.0592)
Brown
LWR 1.504 - 1.507 (0.0592 - 0.0593) Green
23 UPR 1.504 - 1.507 (0.0592 - 0.0593)
Green
LWR 1.507 - 1.510 (0.0593 - 0.0594) Yellow
34 UPR 1.507 - 1.510 (0.0593 - 0.0594)
Yellow
LWR 1.510 - 1.513 (0.0594 - 0.0596) Blue
Grade number*
Thickness Identification color Remarks
ItemThickness Crankshaft pin journal diameter
US 0.25 (0.0098) 1.627 - 1.635 (0.0641 - 0.0644) Grind so that bearing clearance is the specified value.
Connecting rod bearing oil clearance Standard
0.029 - 0.039 (0.0011 - 0.0015)
Limit 0.10 (0.0039)
Grade number* Thickness Identification color Remarks
0 1.996 - 1.999 (0.0786 - 0.0787) Black
Grade and color are the same
for upper and lower bearings.
1
1.999 - 2.002 (0.0787 - 0.0788) Brown
2 2.002 - 2.005 (0.0788 - 0.0789) Green
3 2.005 - 2.008 (0.0789 - 0.0791) Yellow
4 2.008 - 2.011 (0.0791 - 0.0792) Blue
5 2.011 - 2.014 (0.0792 - 0.0793) Pink
SEM685D
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UNDERSIZE TABLE
Unit: mm (in)
MAIN BEARING OIL CLEARANCE
Unit: mm (in)
01
UPR 1.996 - 1.999 (0.0786 - 0.0787)
Black
Grade and color are different
for upper and lower bearings.
LWR 1.999 - 2.002 (0.0787 - 0.0788)
Brown
12 UPR 1.999 - 2.002 (0.0787 - 0.0788)
Brown
LWR 2.002 - 2.005 (0.0788 - 0.0789) Green
23 UPR 2.002 - 2.005 (0.0788 - 0.0789)
Green
LWR 2.005 - 2.008 (0.0789 - 0.0791) Yellow
34 UPR 2.005 - 2.008 (0.0789 - 0.0791)
Yellow
LWR 2.008 - 2.011 (0.0791 - 0.0792) Blue
45 UPR 2.008 - 2.011 (0.0791 - 0.0792)
Blue
LWR 2.011 - 2.014 (0.0792 - 0.0793) Pink
Grade number*
Thickness Identification color Remarks
SEM685D
ItemsThickness Main journal diameter
0.25 (0.0098) 2.126 - 2.134 (0.0837 - 0.0840) Grind so that bearing clearance is the specified value.
Main bearing oil clearance Standard0.024 - 0.034 (0.0009 - 0.0013)
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PRECAUTIONS
SERVICE INFORMATION
PRECAUTIONS
Precaution for Supplemental Restraint Syst
em (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000005930983
The Supplemental Restraint System such as “A IR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and w hether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WARNING:
• To avoid rendering the SRS inopera tive, which could increase the risk of personal injury or death in
the event of a collision which would result in air bag inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.
• Improper maintenance, including incorrect removal and installation of the SRS can lead to personal
injury caused by unintent ional activation of the system. For re moval of Spiral Cable and Air Bag
Module, see the SRS section.
• Do not use electrical test equipmen t on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harn esses can be identified by yellow and/or orange harnesses or har-
ness connectors.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING:
• When working near the Airbag Diagnosis Sensor Unit or other Airbag System sensors with the Igni-
tion ON or engine running, DO NOT use air or electri c power tools or strike near the sensor(s) with a
hammer. Heavy vibration could activate the sensor( s) and deploy the air bag(s), possibly causing
serious injury.
• When using air or electric power tools or hammers , always switch the Ignition OFF, disconnect the
battery, and wait at least 3 minu tes before performing any service.
Precaution Necessary for Steering W heel Rotation After Battery Disconnect
INFOID:0000000005930984
NOTE:
• This Procedure is applied only to models with Intelligent Key system and NATS (NISSAN ANTI-THEFT SYS-
TEM).
• Remove and install all control units after disconnecting both battery cables with the ignition knob in the
″LOCK ″ position.
• Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If DTC is detected, perform trouble diagnosis according to self-diagnostic results.
For models equipped with the Intelligent Key system and NATS, an electrically controlled steering lock mech-
anism is adopted on the key cylinder.
For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and
steering wheel rotation will become impossible.
If steering wheel rotation is required when battery pow er is interrupted, follow the procedure below before
starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables. NOTE:
Supply power using jumper cables if battery is discharged.
2. Use the Intelligent Key or mechanical key to turn the ignition switch to the ″ACC ″ position. At this time, the
steering lock will be released.
3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be rotated.
4. Perform the necessary repair operation.
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