Nissan Tiida C11. Instruction — part 718
EM-224
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ENGINE UNIT
PISTON TO CYLINDER BORE CLEARANCE
Cylinder Bore Inner Diameter
• Using a bore gauge (A), 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 “C”) (“Y” is in longitudinal direction of
engine)
NOTE:
When determining cylinder bore grade, measure the cylinder bore
“X” direction at “B” position.
• If the measured value exceeds the limit, or if there are scratches
and/or seizure on the cylinder inner wall, replace cylinder block.
NOTE:
Oversize piston is not provided.
Piston Skirt Diameter
Measure the outer diameter of piston skirt with a micrometer (A).
Piston to Cylinder Bore Clearance
Calculate by piston skirt diameter and cylinder bore inner diameter (direction “X”, position “B”).
(Clearance) = (Cylinder bore inner diameter) – (Piston skirt diameter)
• If it exceeds the limit, replace piston and piston pin assembly and/or cylinder block. Refer to
CRANKSHAFT MAIN JOURNAL DIAMETER
Standard inner diameter:
84.000 - 84.020 mm (3.3071 - 3.3079 in)
Out-of-round (Difference between “X” and “Y”):
0.015 mm (0.0006 in)
Taper limit (Difference between “A” and “C”):
0.01 mm (0.0004 in)
PBIC4014E
Measure point
: Distance from the top 39.9 mm (1.571 in)
Standard
: 83.970 - 83.990 mm (3.3059 - 3.3067 in)
PBIC3272J
Standard
: 0.020 - 0.040 mm (0.0008 - 0.0016 in)
Limit
: 0.08 mm (0.0031 in)
ENGINE UNIT
EM-225
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• Measure the outer diameter of crankshaft main journals with a
micrometer (A).
• If out of the standard, measure the main bearing oil clearance.
Then use undersize bearing. Refer to "MAIN BEARING OIL
CLEARANCE".
CRANKSHAFT PIN JOURNAL DIAMETER
• Measure the outer diameter of crankshaft pin journal with a micrometer.
• If out of the standard, measure the connecting rod bearing oil clearance. Then use undersize bearing. Refer
to "CONNECTING ROD BEARING OIL CLEARANCE".
OUT-OF-ROUND AND TAPER OF CRANKSHAFT
• Measure the dimensions at four different points as shown on each
main journal and pin journal with a micrometer.
• Out-of-round is indicated by the difference in dimensions 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 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 "MAIN BEARING OIL CLEARANCE" and/or "CON-
NECTING ROD BEARING OIL CLEARANCE".
CRANKSHAFT RUNOUT
• Place a V-block on a precise flat table to support the journals on
the both end of the crankshaft.
• Place a dial indicator (A) straight up on the No. 3 journal.
• While rotating crankshaft, read the movement of the pointer on the
dial indicator. (Total indicator reading)
• If it exceeds the limit, replace crankshaft.
CONNECTING ROD BEARING OIL CLEARANCE
Method by Calculation
Standard: 51.959 - 51.979 mm (2.0456 - 2.0464 in) dia.
PBIC3457J
Standard: 43.953 - 43.971 mm (1.7304-1.7311 in) dia.
Limit:
Out-of-round (Difference between “X” and “Y”)
: 0.0035 mm (0.0001 in)
Taper (Difference between “A” and “B”)
: 0.0035 mm (0.0001 in)
PBIC3459J
Standard
: 0.05 mm (0.0020 in)
Limit
: 0.10 mm (0.0040 in)
PBIC3458J
EM-226
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[MR18DE]
ENGINE UNIT
• Install connecting rod bearings (2) to connecting rod (3) and con-
necting rod bearing cap (1), and tighten connecting rod bolts to the
specified torque. Refer to
EM-212, "Disassembly and Assembly"
for tightening procedure.
• Measure the inner diameter of connecting rod bearing with an
inside micrometer.
(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
"How to Select Piston and Bearing"
.
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 bolts to the specified
EM-212, "Disassembly and Assembly"
for the tightening procedure.
CAUTION:
Never rotate crankshaft.
• 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.
Refer to
EM-212, "Disassembly and Assembly"
for the tightening
procedure.
• Measure the inner diameter of main bearing with a bore gauge.
(Bearing oil clearance) = (Main bearing inner diameter) – (Crank-
shaft main journal diameter)
A
: Example
B
: Inner diameter measuring direction
Standard
: 0.037 - 0.047 mm (0.0015 - 0.0019 in)
Limit
: 0.07 mm (0.0028 in)
PBIC3275J
PBIC3276J
A
: Example
B
: Inner diameter measuring direction
Standard:
No. 1, 4 and 5 journals
: 0.024 - 0.034 mm (0.0009 - 0.0013 in)
No. 2 and 3 journals
: 0.012 - 0.022 mm (0.0005 - 0.0009 in)
Limit
: 0.065 mm (0.0026 in)
PBIC3277J
ENGINE UNIT
EM-227
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• 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-212, "Disassembly and Assembly"
for the tightening procedure.
CAUTION:
Never 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
• 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 bearing cap is removed after being tightened
to the specified torque with connecting rod bearings (1) installed,
the tip end of bearing must protrude. Refer to
for the tightening procedure (B).
• If the standard is not met, replace connecting rod bearings.
MAIN BEARING CAP BOLT OUTER DIAMETER
PBIC3278J
A
: Example
Standard
: There must be crush height.
PBIC3279J
A
: Example
Standard
: There must be crush height.
PBIC3279J
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