Nissan Titan. Manual — part 326
EM-108
< UNIT DISASSEMBLY AND ASSEMBLY >
ENGINE UNIT
• 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
EM-93, "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
.
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
.
(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
: 0.007 - 0.017 mm (0.0003 - 0.0007 in)
PBIC1644E
ENGINE UNIT
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• 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
.
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-93, "Disassembly and Assem-
• If standard is not met, replace main bearings.
CRUSH HEIGHT OF CONNECTING ROD BEARING
• When connecting rod bearing cap is removed after being tightened
to the specified torque with the connecting rod bearings installed,
the tip end of the bearing must protrude. Refer to
for tightening procedure.
• If standard is not met, replace connecting rod bearings.
MAIN BEARING CAP BOLT DIAMETER
Limit:
No.1 and 5 journals
: 0.021 mm (0.0008 in)
No. 2, 3 and 4 journals
: 0.027 mm (0.0011 in)
KBIA2551E
Standard
: There must be crush height
SEM502G
Standard
: There must be crush height.
PBIC1646E
EM-110
< UNIT DISASSEMBLY AND ASSEMBLY >
ENGINE UNIT
• 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).
M9 bolt
M12 bolt
• Replace applicable bolts if outside the limit.
CONNECTING ROD BOLT DIAMETER
• Measure diameter
″d″ at position shown.
• When (d) is out of specifications (when it becomes thinner),
replace bolt with a new one.
KBIA2497E
Dimension (a)
: 9 mm (0.35 in)
Dimension (b)
: 15 mm (0.59 in)
Dimension (c)
: 20 mm (0.79 in)
Limit
: 0.15 mm (0.0059 in)
Dimension (a)
: 12 mm (0.47 in)
Dimension (b)
: 55 mm (2.17 in)
Dimension (c)
: 20 mm (0.79 in)
Limit
: 0.15 mm (0.0059 in)
Limit
: 7.75 mm (0.3051 in) or less.
SBIA0286E
HOW TO SELECT PISTON AND BEARING
EM-111
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HOW TO SELECT PISTON AND BEARING
How to Select Piston and Bearing
INFOID:0000000009886448
DESCRIPTION
*For the service parts, the grade for fitting cannot be selected between a piston pin and a connecting rod.
(Only 0 grade is available.) The information at the shipment from the plant is described as a reference.
• The identification grade stamped on each part is the grade for the dimension measured in new condition.
This grade cannot apply to reused parts.
• For reused or repaired parts, measure the dimension accurately. Determine the grade by comparing the
measurement with the values of each selection table.
• For details of the measurement method of each part, the reuse standards, and the selection method of the
selective fitting parts, follow the applicable procedure.
HOW TO SELECT PISTON
Piston Selective Fitting When New Cylinder Block is Used:
• Check the cylinder bore grade on the bottom face of the cylinder
block, and select the piston of the same grade.
Connecting points
Connecting parts
Selection items
Selection methods
Between cylinder block to
crankshaft
Main bearing
Main bearing grade (bearing
thickness)
Determined by match of cylin-
der block bearing housing
grade (Housing inside diame-
ter) and crankshaft journal
grade (journal outside diameter)
Between crankshaft to connect-
ing rod
Connecting rod bearing
Connecting rod bearing grade
(bearing thickness)
Connecting rod bearing grade =
crankshaft pin grade (pin diam-
eter). No grade exists for inside
diameter of connecting rod
large end.
Between cylinder block to pis-
ton
Piston and piston pin assembly.
The piston is available together
with piston pin as an assembly.
Piston grade (piston diameter)
Piston grade = cylinder bore
grade (diameter of bore)
*Between piston to connecting
rod
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KBIA2495E
KBIA2496E
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