2011 NISSAN LATIO Service Repair Manual

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Page 2609 of 3787

NISSAN LATIO 2011 Service Repair Manual CYLINDER BLOCKEM-219
< SERVICE INFORMATION > [MR18DE]
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Use Undersize Bearing Usage Guide
• When the specified main bearing oil clearance is not
obtained with standard

Page 2610 of 3787

NISSAN LATIO 2011 Service Repair Manual EM-220
< SERVICE INFORMATION >[MR18DE]
CYLINDER BLOCK
• Measure the side clearance between connecting rod and crank-
shaft arm with a feeler gauge (A).
• If the measured value exceeds the limit, r

Page 2611 of 3787

NISSAN LATIO 2011 Service Repair Manual CYLINDER BLOCKEM-221
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• Measure the side clearance of piston ring and piston ring groove
with a feeler gauge (A).
• If the measured

Page 2612 of 3787

NISSAN LATIO 2011 Service Repair Manual EM-222
< SERVICE INFORMATION >[MR18DE]
CYLINDER BLOCK
• Check with a connecting rod aligner.
• If it exceeds the limit, replace connecting rod assembly.
CONNECTING ROD BIG END DIAMETER
• Install

Page 2613 of 3787

NISSAN LATIO 2011 Service Repair Manual CYLINDER BLOCKEM-223
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Measure the outer diameter of
piston pin with a micrometer (A).
Connecting Rod Bushing Oil Clearance
(Connecting

CYLINDER BLOCKEM-223
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Measure the outer diameter of
piston pin with a micrometer (A).
Connecting Rod Bushing Oil Clearance
(Connecting rod bushing oil clearance) = (Connecting rod bus hing inner diameter) – (Piston pin outer diame-
ter)
• If the measured value is out of the standard, repl ace connecting rod assembly and/or piston and piston pin
assembly.
• If replacing piston and piston pin assembly, follow t he "PISTON TO PISTON PIN OIL CLEARANCE" proce-
dure.
• If replacing connecting rod assembly, follow the "Connecting Rod Bushing Oil Clearance" procedure to select connecting rod bearing.
CYLINDER BLOCK TOP SURFACE DISTORTION
• Using a scraper, remove gasket on the cylinder block surface, and also remove engine oil, scale, carbon, or
other contamination.
CAUTION:
Be careful not to allow gasket flakes to en ter engine oil or engine coolant passages.
• Measure the distortion on the cylinder block upper face at some
different points in six directions with a straight edge (A) and feeler
gauge (B).
• If it exceeds the limit, replace cylinder block.
MAIN BEARING HOUSING INNER DIAMETER
• Install main bearing cap without main bearings insta lled, and tighten main bearing cap bolts to the specified
torque. Refer to EM-203, "
Disassembly and Assembly" for the tightening procedure.
• Measure the inner diameter of main bearing housing with a bore gauge.
• Measure the position shown [5 mm (0.20 in)] backward from main bearing housing front side in the 2 directions as shown. The
smaller one is the measured value.
• If out of the standard, replace cylinder block and main bearing caps assembly.
NOTE: Standard: 19.989 - 19.995 mm (0.7870 - 0.7872 in)
PBIC3266J
Standard : 0.005 - 0.023 mm (0.0002 - 0.0009 in)
Limit : 0.03 mm (0.0012 in)
Limit: 0.1 mm (0.004 in)
PBIC3250J
1 : Cylinder block
2 : Main bearing cap
: Engine front
Standard: 55.997 - 56.017 mm (2.2046 - 2.2054 in)
PBIC4005E
Revision: May 2010 2011 Versa

Page 2614 of 3787

NISSAN LATIO 2011 Service Repair Manual EM-224
< SERVICE INFORMATION >[MR18DE]
CYLINDER BLOCK
Main bearing caps cannot be replaced as a single part
, because it is machined together with cylinder block.
PISTON TO CYLINDER BORE CLEARANCE
Cyl

Page 2615 of 3787

NISSAN LATIO 2011 Service Repair Manual CYLINDER BLOCKEM-225
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• Measure the outer diameter of crankshaft main journals with a
micrometer (A).
• If out of the standard, meas

CYLINDER BLOCKEM-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. Follow the "MAIN BEARING OIL
CLEARANCE" procedure.
CRANKSHAFT PIN JOURNAL DIAMETER
• Measure the outer diameter (Dp) of crankshaft pin journal with amicrometer.
• If out of the standard, measure the connecting rod bearing oil clearance. Then use undersize bearing. Follow the "CONNECT-
ING ROD BEARING OIL CLEARANCE" procedure.
OUT-OF-ROUND AND TAPER OF CRANKSHAFT
• Measure the dimensions at four different points as shown on eachmain 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. Follow the "MAIN BEARING OIL CLEARANCE" and/or "CON-
NECTING ROD BEARING OIL CLEARANCE" procedures.
CRANKSHAFT RUNOUT
• Place a V-block on a precise flat table to support the journals onthe 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.
AEM028
Limit: Out-of-round [Differen ce 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
Revision: May 2010 2011 Versa

Page 2616 of 3787

NISSAN LATIO 2011 Service Repair Manual EM-226
< SERVICE INFORMATION >[MR18DE]
CYLINDER BLOCK
• Install connecting rod bearings (2) to connecting rod (3) and con-
necting rod bearing cap (1), and tighten connecting rod bolts to the
specif

EM-226
< SERVICE INFORMATION >[MR18DE]
CYLINDER BLOCK
• 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-203, "
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 EM-212,
"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 torque. Refer to EM-203, "
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-203, "
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
Revision: May 2010 2011 Versa

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