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Page 1917 of 4210

INFINITI QX56 2010 Factory Service Manual EM-66
< ON-VEHICLE REPAIR >
OIL SEAL
• Press-fit until the height of the front oil seal is level with themounting surface using suitable tool.
CAUTION:
• Do not damage front timing chain case and

Page 1922 of 4210

INFINITI QX56 2010 Factory Service Manual CYLINDER HEADEM-71
< ON-VEHICLE REPAIR >
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3. Remove the valve collet using Tools.
CAUTION:
When working, take care not to damage valve lifter holes.
4. Remove the valve

Page 1923 of 4210

INFINITI QX56 2010 Factory Service Manual EM-72
< ON-VEHICLE REPAIR >
CYLINDER HEAD
6. Install the valve springs.• Install the narrow pitch end (paint mark side) to the cylinderhead side.
7. Install the valve spring retainers.
8. Install th

Page 1928 of 4210

INFINITI QX56 2010 Factory Service Manual CYLINDER HEADEM-77
< ON-VEHICLE REPAIR >
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• Set try square along the side of valve spring and rotate the spring.
Measure the maximum clearance between the top face of s

Page 1949 of 4210

INFINITI QX56 2010 Factory Service Manual EM-98
< DISASSEMBLY AND ASSEMBLY >
ENGINE UNIT
• Remove oil and dust on the crankshaft pin and surfaces of eachbearing completely.
• Cut a plastigage slightly shorter than the bearing width, and

EM-98
< DISASSEMBLY AND ASSEMBLY >
ENGINE UNIT
• Remove oil and dust on the crankshaft pin and surfaces of eachbearing completely.
• Cut a plastigage slightly shorter than the bearing width, and place
it in the crankshaft axial direction, avoiding oil holes.
• Install the connecting rod beari ngs to the connecting rod and con-
necting rod bearing cap, and tighten the connecting rod bolts to the
specified torque.
CAUTION:
Do not rotate crankshaft with plastigage installed.
• Remove the connecting rod bear ing cap and bearings. Measure
the plastigage width using the scale on the plastigage bag.
NOTE:
The procedure when the measured value exceeds the repair limit is the same as that described in “Method
of Measurement”.
MAIN BEARING OIL CLEARANCE
Method of Measurement
• Install the main bearings to the cylinder block and main bearing cap. Measure the main bearing inside diameter with the bearing
cap bolts tightened to the specified torque. Refer to EM-83, "
Disas-
sembly and Assembly".
(Oil clearance) = (Inside diameter of main bearing) – (Crankshaft
journal diameter)
• If measured value exceeds the repair limit, select main bearings referring to the main bearing inside diame-
ter and crankshaft journal diameter, so that the oil clearance satisfies the standard. Refer to EM-101, "
How
to Select Piston and Bearing".
Method of Using Plastigage
• Remove oil and dust on the crankshaft journal and surfaces of
each bearing completely.
• Cut a plastigage slightly shorter than the bearing width, and place it in crankshaft axial direction, avoiding oil holes.
• Install the main bearings to the cylinder block and main bearing cap, and tighten the main bearing bolts to the specified torque.
CAUTION:
Do not rotate crankshaft with plastigage installed.
• Remove bearing cap and bearings. Measure plastigage width using the scale on the plastigage bag.
NOTE:
The procedure when the measured value exceeds the repair limit
is the same as that descri bed in “Method of Measurement”.
CRUSH HEIGHT OF MAIN BEARING
KBIA2550E
Standard:
No. 1 and 5 journals : 0.001 - 0.011 mm (0.00004 - 0.0004 in)
No. 2, 3 and 4 journals : 0.007 - 0.017 mm (0.0003 - 0.0007 in)
Limit: No.1 and 5 journals : 0.021 mm (0.0008 in)
No. 2, 3 and 4 journals : 0.027 mm (0.0011 in)
PBIC1644E
KBIA2551E
Revision: April 20092010 QX56

Page 1950 of 4210

INFINITI QX56 2010 Factory Service Manual ENGINE UNITEM-99
< DISASSEMBLY AND ASSEMBLY >
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• When the bearing cap is removed after being tightened to the
specified torque with main bearings installed, the tip end

Page 1960 of 4210

INFINITI QX56 2010 Factory Service Manual SERVICE DATA AND SPECIFICATIONS (SDS)EM-109
< SERVICE DATA AND SPECIFICATIONS (SDS)
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Unit: mm (in)
SPARK PLUG
Unit: mm (in)
CAMSHAFT AND CAMSHAFT BEARING
Unit: mm (in)
*

Page 1962 of 4210

INFINITI QX56 2010 Factory Service Manual SERVICE DATA AND SPECIFICATIONS (SDS)EM-111
< SERVICE DATA AND SPECIFICATIONS (SDS)
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Unit: mm (in)
Spark Plug Tube
Unit: mm (in)
Valve Dimensions
Unit: mm (in)
Items
Sta

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