Nissan Versa Sedan. Instruction — part 393
CYLINDER BLOCK
EM-107
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C
D
E
F
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Piston Skirt Diameter
Measure the outer diameter of piston skirt with a suitable tool (A).
Piston to Cylinder Bore Clearance
Calculate by piston skirt diameter and cylinder bore inner diameter
[direction (B), position (D)].
(Clearance) = (Cylinder bore inner diameter) – (Piston skirt diame-
ter)
• If it exceeds the limit, replace piston and piston pin assembly and/or cylinder block. Refer to
CRANKSHAFT MAIN JOURNAL DIAMETER
• Measure the outer diameter of crankshaft main journals with a suit-
able tool (A).
• If out of the standard, measure the main bearing oil clearance.
Then use undersize bearing. Refer to
CRANKSHAFT PIN JOURNAL DIAMETER
• Measure the outer diameter of crankshaft pin journal with a suitable tool.
• If out of the standard, measure the connecting rod bearing oil clearance. Then use undersize bearing. Refer
EM-126, "Connecting Rod Bearing"
.
OUT-OF-ROUND AND TAPER OF CRANKSHAFT
Standard :
PBIC3272J
(A)
: Direction A
(C)
: Position C
(E)
: Position E
(f)
: 10 mm (0.39 in)
(g)
: 60 mm (2.36 in)
(h)
: 124 mm (4.88 in)
Standard and Limit
: Refer to
.
JPBIA2059ZZ
Standard :
PBIC3457J
Standard :
EM-108
< UNIT DISASSEMBLY AND ASSEMBLY >
[HR16DE]
CYLINDER BLOCK
• Measure the dimensions at four different points as shown on each
main journal and pin journal with a suitable tool.
• Out-of-round is indicated by the difference in dimensions between
(a) and (b) at (c) and (d).
• Taper is indicated by the difference in dimension between (c) and
(d) at (a) and (b).
• If the measured value exceeds the limit, correct or replace crankshaft.
• If corrected, measure the bearing oil clearance of the corrected main journal and/or pin journal. Then select
main bearing and/or connecting rod bearing. Refer to
EM-126, "Connecting Rod Bearing"
CRANKSHAFT RUNOUT
• Place a V-block on a precise flat table to support the journals on both ends of the crankshaft.
• Place a suitable tool (A) straight up on the No. 3 journal.
• While rotating crankshaft, read the movement of the pointer on the
suitable tool. (Total indicator reading)
• If it exceeds the limit, replace crankshaft.
CONNECTING ROD BEARING OIL CLEARANCE
Method by Calculation
• Install connecting rod bearings (2) to connecting rod (3) and con-
necting rod cap (1), and tighten connecting rod cap bolts to the
specified torque. Refer to
EM-95, "Disassembly and Assembly"
• Measure the inner diameter of connecting rod bearing with a suit-
able tool.
(Bearing oil clearance) = (Connecting rod bearing inner diameter)
– (Crankshaft pin journal diameter)
• If clearance exceeds the limit, select proper connecting rod bearing according to connecting rod big end
diameter and crankshaft pin journal diameter to obtain specified bearing oil clearance. Refer to
.
Method of Using Plastigage
• Remove engine oil and dust on crankshaft pin and the 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 connecting rod bearings to connecting rod and cap, and tighten connecting rod cap bolts to the speci-
fied torque. Refer to
EM-95, "Disassembly and Assembly"
.
CAUTION:
Do not rotate crankshaft.
Limit:
Out-of-round [Difference between (a) and (b)]
Taper [Difference between (c) and (d)]
: Refer to
.
JPBIA0229ZZ
Standard and Limit
: Refer to
PBIC3458J
(A)
: Example
(B)
: Inner diameter measuring direction
Standard and Limit : Refer to
EM-126, "Connecting Rod Bearing"
PBIC3275J
CYLINDER BLOCK
EM-109
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• Remove connecting rod cap and bearing, and using the scale (A)
on the plastigage bag, measure the plastigage width.
NOTE:
The procedure when the measured value exceeds the limit is
same as that described in the “Method by Calculation”.
MAIN BEARING OIL CLEARANCE
Method by Calculation
• Install main bearings (3) to cylinder block (1) and main bearing cap
(2), and tighten main bearing cap bolts to the specified torque.
EM-95, "Disassembly and Assembly"
.
• Measure the inner diameter (B) of main bearing (3) with a suitable
tool.
(Bearing oil clearance) = (Main bearing inner diameter) – (Crank-
shaft main journal diameter)
• If clearance exceeds the limit, select proper main bearing according to main bearing inner diameter and
crankshaft main journal diameter to obtain specified bearing oil clearance. Refer to
.
Method of Using Plastigage
• Remove engine oil and dust on crankshaft main journal and the 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 main bearings to cylinder block and main bearing cap, and tighten main bearing cap bolts to the spec-
ified torque. Refer to
EM-95, "Disassembly and Assembly"
CAUTION:
Do not rotate crankshaft.
• Remove main bearing cap and bearings, and using the scale (A)
on the plastigage bag, measure the plastigage width.
NOTE:
The procedure when the measured value exceeds the limit is
same as that described in the “Method by Calculation”.
MAIN BEARING CRUSH HEIGHT
PBIC3276J
(A)
: Example
(B)
: Inner diameter measuring direction
Standard and Limit : Refer to
.
PBIC3277J
PBIC3278J
EM-110
< UNIT DISASSEMBLY AND ASSEMBLY >
[HR16DE]
CYLINDER BLOCK
• When main bearing cap is removed after being tightened to the
specified torque with main bearings (1) installed, the tip end of
bearing must protrude (B). Refer to
• If the standard is not met, replace main bearings.
CONNECTING ROD BEARING CRUSH HEIGHT
• When connecting rod cap is removed after being tightened to the
specified torque with connecting rod bearings (1) installed, the tip
end of bearing must protrude (B). Refer to
.
• If the standard is not met, replace connecting rod bearings.
MAIN BEARING CAP BOLT OUTER DIAMETER
• Measure the outer diameters (d
1
) and (d
2
) at two positions as
shown.
• If reduction appears in places other than (B) range, regard it as
(d
2
).
• If it exceeds the limit (a large difference in dimensions), replace
main bearing cap bolt with a new one.
CONNECTING ROD CAP BOLT OUTER DIAMETER
• Measure the outer diameter (d) at position as shown.
• If reduction appears in a position other than (d), regard it as (d).
• When (d) is less than the limit (when it becomes thinner), replace
connecting rod cap bolt with a new one.
FLYWHEEL DEFLECTION (M/T models)
(A)
: Example
Standard
: There must be crush height.
PBIC3279J
(A)
: Example
Standard
: There must be crush height.
PBIC3279J
(A)
: (d1) measuring position
(B)
: (d2) measuring position
Limit [(d
1
) – (d
2
)]: 0.2 mm (0.0078 in)
PBIC4015E
Limit: 7.75 mm (0.3051 in)
PBIC4016E
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