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HOW TO SELECT PISTON AND BEARINGEM-127
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2. Apply crankshaft pin journal
diameter grade stamped on crank-
shaft front side to the column in the “CONNECTING ROD
BEARING SELECTION TABLE”.
3. Read the symbol at the cross point of select ed row and column in the “CONNECTING ROD BEARING
SELECTION TABLE”.
4. Apply the symbol obtained to the “CONNECTING ROD BEARING GRADE TABLE” to select connecting
rod bearing.
WHEN CONNECTING ROD AND CRANKSHAFT ARE REUSED
1. Measure connecting rod big end diameter and crankshaft pin journal diameter. Refer to EM-115, "Inspec-
tion".
2. Correspond the measured dimension in connecting rod big end diameter row of “CONNECTING ROD
BEARING SELECTION TABLE”.
3. Correspond the measured dimension in crankshaft pi n journal diameter column of “CONNECTING ROD
BEARING SELECTION TABLE”.
4. Follow from step 3 in “WHEN NEW CONNECTING ROD AND CRANKSHAFT ARE USED”.
CONNECTING ROD BEARING SELECTION TABLE
CONNECTING ROD BEARING GRADE TABLE
UNDERSIZE BEARING 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 c onnecting rod bearing oil clearance satisfies the standard.
CAUTION:
A : Pin diameter grade No. 1
B : Pin diameter grade No. 2
C : Pin diameter grade No. 3
D : Pin diameter grade No. 4
E : Journal diameter grade No. 1
F : Journal diameter grade No. 2
G : Journal diameter grade No. 3
H : Journal diameter grade No. 4
I : Journal diameter grade No. 5
JPBIA2283ZZ
JSBIA0535GB
Connecting rod bearing grade table : Refer to EM-142, "ConnectingRodBearing".
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![INFINITI QX56 2011 Factory Service Manual
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HOW TO SELECT PISTON AND BEARING
In grinding crankshaft pin to use undersize bearings, keep the
fillet R (A) [1.5 - 1.7 mm (0.059 - 0.067 in)].
Main BearingIN INFINITI QX56 2011 Factory Service Manual
EM-128
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HOW TO SELECT PISTON AND BEARING
In grinding crankshaft pin to use undersize bearings, keep the
fillet R (A) [1.5 - 1.7 mm (0.059 - 0.067 in)].
Main BearingIN](/manual-img/42/57033/w960_57033-2689.png)
EM-128
< UNIT DISASSEMBLY AND ASSEMBLY >
HOW TO SELECT PISTON AND BEARING
In grinding crankshaft pin to use undersize bearings, keep the
fillet R (A) [1.5 - 1.7 mm (0.059 - 0.067 in)].
Main BearingINFOID:0000000006289588
WHEN NEW CYLINDER BLOCK AND CRANKSHAFT ARE USED
1. Apply the main bearing housing grade on the bottom face of thecylinder block to the row in “MAIN BEARING SELECTION
TA B L E ” .
2. “MAIN BEARING SELECTION TABLE” columns correspond to
journal diameter grade on front side of crankshaft.
3. Select main bearing grade at the point where selected row and column meet in “MAIN BEARING SELEC- TION TABLE”.
CAUTION:
Initial clearance for No. 1, 5 journal and No. 2, 3, 4 journal is different. Use two different selection
table for each part.
No. 1, 5 journal and No. 2, 3, 4 journal have the same signs but different measures. Never con-
fuse.
4. Apply sign at crossing in above step 3 to “MAIN BEARING GRADE TABLE”.
NOTE:
“MAIN BEARING GRADE TABLE” applies to all journals.
Service parts are available as a set of both upper and lower.
WHEN CYLINDER BLOCK AND CRANKSHAFT ARE REUSED
1. Measure cylinder block main bearing housing inner diameter and crankshaft main journal diameter. Refer to EM-115, "
Inspection".
JPBIA0216ZZ
Bearing undersize table : Refer to EM-142, "ConnectingRodBearing".
KBIA2495E
A : Pin diameter grade No. 1
B : Pin diameter grade No. 2
C : Pin diameter grade No. 3
D : Pin diameter grade No. 4
E : Journal diameter grade No. 1
F : Journal diameter grade No. 2
G : Journal diameter grade No. 3
H : Journal diameter grade No. 4
I : Journal diameter grade No. 5
JPBIA2283ZZ
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2. Correspond the measured dimension in “Cylinder
block main bearing housing inner diameter” row of
“MAIN BEARING SELECTION TABLE”.
3. Correspond the measured dimension in “Crankshaft main journal diameter” column of “MAIN BEARING
SELECTION TABLE”.
4. Follow from step 3 in “When New Cylinder Block and Crankshaft are Used”.
MAIN BEARING SELECTION TABLE (No. 1 and 5 Journal)
JPBIA2285GB
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HOW TO SELECT PISTON AND BEARING
MAIN BEARING SELECTION TABLE (No. 2, 3 and 4 Journal)
MAIN BEARING GRADE TABLE (ALL JOURNALS)
UNDERSIZE BEARING USAGE GUIDE
When the specified main bearing oil clearance is not obtained with standard size main bearings, use under-side (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:
JPBIA2286GB
Main bearing grade table (A ll journals) : Refer to EM-141, "MainBearing".
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In grinding crankshaf
t main journal to use undersize bearings,
keep the fillet R (A) [1.5 - 1.7 mm (0.059 - 0.067 in)].
JPBIA0216ZZ
Bearing undersize table : Refer to EM-141, "MainBearing".
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< SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
General SpecificationINFOID:0000000006289589
GENERAL SPECIFICATIONS
Drive BeltsINFOID:0000000006289590
DRIVE BELT
Spark PlugINFOID:0000000006289591
SPARK PLUG
Unit: mm (in)
Cylinder arrangementV-8
Displacement cm
3 (cu in) 5,552 (338.80)
Bore and stroke mm (in) 98.0 x 92.0 (3.86 x 3.62)
Valve arrangement DOHC
Firing order 1-8-7-3-6-5-4-2
Number of piston rings Compression 2
Oil 1
Number of main bearings 5
Compression ratio 10.8
Compression pressure
kPa (kg/cm
2, psi)/200 rpm Standard 1,667 (17, 242)
Minimum 1,226 (12.5, 178)
Differential limit between cylinders 98 (1.0, 14)
Cylinder number Unit: degree
Valve timing Intake valve open (BTDC) (
−61) - (+ 58)
Intake valve close (ABDC) ( −76) - (+ 69)
Exhaust valve open (BBDC) 56 Exhaust valve close (ATDC) 8
SEM957C
Tension of drive belts Belt tension is not necessary, as it is automatically adjusted by drive belt auto-tensioner.
Make NGK
Standard type DILKAR7B11
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SERVICE DATA AND SPECIFICATIONS (SDS)
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Exhaust ManifoldINFOID:0000000006289592
EXHAUST MANIFOLD
Unit: mm (in)
CamshaftINFOID:0000000006289593
EXHAUST CAMSHAFT
Unit: mm (in)
*: Total indicator reading
INTAKE CAMSHAFT
Unit: mm (in)
*1: Total indicator reading
VA LV E L I F T E R
Unit: mm (in)
VALVE CLEARANCE
Gap
Standard 1.1 (0.043)
Limit 1.25 (0.049)
Items Limit
Surface distortion Exhaust manifold 0.7 (0.028)
Items Standard Limit
Exhaust camshaft journal oil clearance 0.030 - 0.071 (0.0012 - 0.0028) 0.150 (0.0059)
VVEL ladder asse mbly bracket inner diameter (EXH side) 26.000 - 26.021 (1.0236 - 1.0244) —
Exhaust camshaft journal diameter 25.935 - 25.955 (1.0211 - 1.0218) —
Exhaust camshaft end play 0.115 - 0.188 (0.0045 - 0.0074) 0.24 (0.0094)
Exhaust camshaft cam height “A” 45.475 - 45.665 (1.7904 - 1.7978) 45.275 (1.7825)
Exhaust camshaft runout [TIR*] Less than 0.02 (0.0008) 0.05 (0.002)
Exhaust camshaft sprocket runout [TIR*] — 0.2 (0.0079)
SEM671
Items Standard Limit
Drive shaft end play 0.115 - 0.188 (0.0045 - 0.0074) 0.24 (0.0094)
Intake camshaft sprocket runout [TIR*
1] — 0.15 (0.0059)
Items Standard
Valve lifter outer diameter 33.980 - 33.990 (1.3378 - 1.3382)
Valve lifter hole diameter 34.000 - 34.016 (1.3386 - 1.3392)
Valve lifter clearance 0.010 - 0.036 (0.0004 - 0.0014)
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SERVICE DATA AND SPECIFICATIONS (SDS)
Unit: mm (in)
*: Approximately 80°C (176 °F)
AVAILABLE VALVE LIFTER
Unit: mm (in)
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)
Identification (stamped) mark Thickness 788P 7.88 (0.3102)
790P 7.90 (0.3110)
792P 7.92 (0.3118)
794P 7.94 (0.3126)
796P 7.96 (0.3134)
798P 7.98 (0.3142)
800P 8.00 (0.3150)
802P 8.02 (0.3157)
804P 8.04 (0.3165)
806P 8.06 (0.3173)
808P 8.08 (0.3181)
810P 8.10 (0.3189)
812P 8.12 (0.3197)
814P 8.14 (0.3205)
816P 8.16 (0.3213)
818P 8.18 (0.3220)
820P 8.20 (0.3228)
822P 8.22 (0.3236)
824P 8.24 (0.3244)
826P 8.26 (0.3252)
828P 8.28 (0.3260)
830P 8.30 (0.3268)
832P 8.32 (0.3276)
834P 8.34 (0.3283)
836P 8.36 (0.3291)
838P 8.38 (0.3299)
840P 8.40 (0.3307)
SEM758G
Revision: 2010 May2011 QX56