2006 INFINITI QX56 Factory Service Manual

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Page 1993 of 3383

INFINITI QX56 2006 Factory Service Manual EM-102Revision: November 2009
CYLINDER BLOCK
2006 QX56
Method of Using Plastigage
Remove oil and dust on the crankshaft journal and surfaces of
each bearing completely.
Cut a plastigage slightly sh

EM-102Revision: November 2009
CYLINDER BLOCK
2006 QX56
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 described in
“Method of Measurement”.
CRUSH HEIGHT OF MAIN BEARING
When the bearing cap is removed after being tightened to the
specified torque with main bearings installed, the tip end of the
bearing must protrude. Refer to EM-82, "
ASSEMBLY" for the
tightening procedure.
If 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 the connecting rod bearings
installed, the tip end of the bearing must protrude. Refer to EM-
82, "ASSEMBLY" for tightening procedure.
If standard is not met, replace connecting rod bearings.
MAIN BEARING CAP BOLT DIAMETER
Check for bolts (M9 and M12) installed from lower side using the
following procedure.
NOTE:
Side bolt (M10) is outside the target.
Figure shows M12 bolt.
Measure bolt diameter ″d1″ from tip of the bolt to dimension "a".
Measure bolt diameter ″d2 ″ from the dimension between tip of
the bolt and dimension ″b ″ as base station to dimension ″c ″.
NOTE:
If a narrower part in the threads is determined by visual check,
measure ″d2 ″ at that point.
Calculate the difference between ″d1 ″ and ″d2 ″.
KBIA2551E
Standard : There must be crush height
SEM502G
Standard : There must be crush height.
PBIC1646E
KBIA2497E

Page 1994 of 3383

INFINITI QX56 2006 Factory Service Manual CYLINDER BLOCKEM-103
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Revision: November 2009 2006 QX56
M9 bolt
M12 bolt
Replace applicable bolts if outside the limit.
CONNECTING ROD BOLT DIAMETER
Measure diameter ″d �

Page 1995 of 3383

INFINITI QX56 2006 Factory Service Manual EM-104Revision: November 2009
SERVICE DATA AND SPECIFICATIONS (SDS)
2006 QX56
SERVICE DATA AND SPECIFICATIONS (SDS)PFP:00030
Standard and LimitEBS00RFL
GENERAL SPECIFICATIONS
DRIVE BELTS
EXHAUST MANIF

Page 1996 of 3383

INFINITI QX56 2006 Factory Service Manual SERVICE DATA AND SPECIFICATIONS (SDS)EM-105
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Revision: November 2009 2006 QX56
CAMSHAFT AND CAMSHAFT BEARING
Unit: mm (in)
*: Total indicator reading
Valve Lifter
Unit: mm (in

Page 1997 of 3383

INFINITI QX56 2006 Factory Service Manual EM-106Revision: November 2009
SERVICE DATA AND SPECIFICATIONS (SDS)
2006 QX56
Available Valve Lifter
Unit: mm (in)
Identification (stamped) Mark Thickness
N788 7.88 (0.3102)
N790 7.90 (0.3110)
N792 7.

Page 1998 of 3383

INFINITI QX56 2006 Factory Service Manual SERVICE DATA AND SPECIFICATIONS (SDS)EM-107
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Revision: November 2009 2006 QX56
CYLINDER HEAD
Unit: mm (in)
Valve Dimensions
Unit: mm (in)
Items
StandardLimit
Head surface dist

Page 1999 of 3383

INFINITI QX56 2006 Factory Service Manual EM-108Revision: November 2009
SERVICE DATA AND SPECIFICATIONS (SDS)
2006 QX56
Valve Guide
Unit: mm (in)
Valve Seat
Unit: mm (in)
Valve Spring
ItemsStandardOversize [0.2 (0.008)] (service)
Valve guide

Page 2000 of 3383

INFINITI QX56 2006 Factory Service Manual SERVICE DATA AND SPECIFICATIONS (SDS)EM-109
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Revision: November 2009 2006 QX56
CYLINDER BLOCK
Unit: mm (in)
Surface flatness Standard
0.03 (0.0012)
LImit 0.1 (0.004)
Main bear

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