2007 INFINITI QX56 Factory Service Manual

fuel consumption wipers key stop start bulb reset infotainment system

Load previous 8 pages

Page 1865 of 3061

INFINITI QX56 2007 Factory Service Manual CYLINDER BLOCK
EM-95
< SERVICE INFORMATION >
C
D
E
F
G
H
I
J
K
L
MA
EM
N
P O
The connecting rod small end grade and piston pin hole (piston
pin) grade are provided only for the parts installed at the

Page 1866 of 3061

INFINITI QX56 2007 Factory Service Manual EM-96
< SERVICE INFORMATION >
CYLINDER BLOCK
• If measurement exceeds the limit, replace connecting rod assem-
bly.
CONNECTING ROD BEARING (BIG END)
• Install the connecting rod cap without the co

Page 1867 of 3061

INFINITI QX56 2007 Factory Service Manual CYLINDER BLOCK
EM-97
< SERVICE INFORMATION >
C
D
E
F
G
H
I
J
K
L
MA
EM
N
P O
(Connecting rod small end oil clearance) = (Inside diameter of con-
necting rod small end) – (Piston pin diameter)
• If

Page 1868 of 3061

INFINITI QX56 2007 Factory Service Manual EM-98
< SERVICE INFORMATION >
CYLINDER BLOCK
• Measure the cylinder bore for wear, out-of-round and taper at six
different points on each cylinder (″X″ and ″Y″ directions at ″A″, "B"
and

Page 1869 of 3061

INFINITI QX56 2007 Factory Service Manual CYLINDER BLOCK
EM-99
< SERVICE INFORMATION >
C
D
E
F
G
H
I
J
K
L
MA
EM
N
P O
1. Cylinder bore size is determined by adding piston-to-bore clearance to piston diameter “A”.
2. Install main bearing

CYLINDER BLOCK
EM-99
< SERVICE INFORMATION >
C
D
E
F
G
H
I
J
K
L
MA
EM
N
P O
1. Cylinder bore size is determined by adding piston-to-bore clearance to piston diameter “A”.
2. Install main bearing caps, and tighten them to the specified torque. Otherwise, cylinder bores may be dis-
torted in final assembly.
3. Cut the 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 one 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-bore clearance.
5. Measure finished cylinder bore for out-of-round and taper.
NOTE:
Measurement should be done after cylinder bore cools down.
CRANKSHAFT JOURNAL DIAMETER
• Measure diameter of crankshaft journals.
• If measurement is out of standard, measure the main bearing oil clearance. Then use the undersize bearing.
CRANKSHAFT PIN DIAMETER
• Measure diameter of crankshaft pin using suitable tool.
• If measurement is out of standard, measure connecting rod bear-
ing oil clearance. Then use undersize bearing.
OUT-OF-ROUND AND TAPER OF CRANKSHAFT
• Measure dimensions at four different points as shown on each
journal and pin.
• Out-of-roundness is indicated by the difference in dimension
between ″X″ and ″Y″ at ″A″ and ″B″.
• Taper is indicated by the difference in dimension between ″A″ and
″B″ at ″X″ and ″Y″.
• If measured value exceeds the standard, correct or replace crankshaft.
• If corrected, measure the bearing oil clearance of the corrected journal or pin. Then select the main bearing
or connecting rod bearing. Rebored size calculation: D = A +B - C
where,
D: Bored diameter
A: Piston diameter as measured
B: Piston - to - bore clearance (standard value)
C: Honing allowance 0.02 mm (0.0008 in)
Standard : 63.940 - 63.964 mm (2.5173 - 2.5183 in)
Standard : 53.956 - 53.974 mm (2.1243 - 2.1250 in)
PBIC0127E
Limit
Out-of-round (Difference between ″X″ and ″Y″)
: 0.002 mm (0.0001 in)
Taper (Difference between ″A″ and ″B″)
: 0.002 mm (0.0001 in)
PBIC1685E

Page 1870 of 3061

INFINITI QX56 2007 Factory Service Manual EM-100
< SERVICE INFORMATION >
CYLINDER BLOCK
CRANKSHAFT RUNOUT
• Place a V-block on a precise flat table to support the journals on
both ends of the crankshaft.
• Measure at No. 3 journal using s

EM-100
< SERVICE INFORMATION >
CYLINDER BLOCK
CRANKSHAFT RUNOUT
• Place a V-block on a precise flat table to support the journals on
both ends of the crankshaft.
• Measure at No. 3 journal using suitable tool.
• While rotating crankshaft, read the movement of the pointer.
• Half of the movement shows the runout.
• If measurement exceeds the limit, replace crankshaft.
CONNECTING ROD BEARING OIL CLEARANCE
Method of Measurement
• Install connecting rod bearings to the connecting rod and cap. Tighten connecting rod bolts to the specified
torque. Refer to EM-78, "
Disassembly and Assembly".
Measure inside diameter of connecting rod bearing.
(Oil clearance) = (Inside diameter of connecting rod bearing) –
(Crankshaft pin diameter)
• If clearance cannot be adjusted within the standard, grind crank-
shaft pin and use undersized bearing. Refer to EM-86, "
How to
Select Piston and Bearing".
Method of Using Plastigage
• Remove oil and dust on the crankshaft pin and surfaces of each
bearing 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 bearings 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 bearing 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-78, "
Disas-
sembly and Assembly".
(Oil clearance) = (Inside diameter of main bearing) – (Crankshaft
journal diameter)Limit : Less than 0.05 mm (0.002 in)
PBIC0129E
Standard : 0.020 - 0.039 mm (0.0008 - 0.0015 in)
Limit : 0.055 mm (0.0022 in)
PBIC1642E
KBIA2550E
Standard:
No. 1 and 5 journals
: 0.001 - 0.011 mm (0.00004 - 0.0004 in)
No. 2, 3 and 4 journals
PBIC1644E

Page 1871 of 3061

INFINITI QX56 2007 Factory Service Manual CYLINDER BLOCK
EM-101
< SERVICE INFORMATION >
C
D
E
F
G
H
I
J
K
L
MA
EM
N
P O
• If measured value exceeds the repair limit, select main bearings referring to the main bearing inside diame-
ter and c

Page 1872 of 3061

INFINITI QX56 2007 Factory Service Manual EM-102
< SERVICE INFORMATION >
CYLINDER BLOCK
• Check for bolts (M9 and M12) installed from lower side using the
following procedure.
NOTE:
• Side bolt (M10) is outside the target.
• Figure show

Load next 8 pages

Page: < prev 1-10 ... 1833-1840 1841-1848 1849-1856 1857-1864 1865-1872 1873-1880 1881-1888 1889-1896 1897-1904 ... 3064 next >

jump start terminals seat adjustment traction control wheel bolt torque brake rotor infotainment