2009 NISSAN LATIO service

CYLINDER HEAD
EM-191
< SERVICE INFORMATION >
[MR18DE] C
D E
F
G H
I
J
K L
M A EM
NP
O
Measure the diameter of valv
e stem with a micrometer (A).
Valve Guide Inner Diameter Measure the inner diameter of valve guide with a bore gauge.
Valve Guide Clearance (Valve guide clearance) = (Valve guide inner diameter) – (Valve stem diameter).
• If it exceeds the limit, replace valve guide and/or valve.
VALVE GUIDE REPLACEMENT When valve guide is removed, replace with oversized [0.2 mm (0.008 in)] valve guide.
1. To remove valve guide, heat cylinder head to 110 ° to 130 °C
(230 ° to 266 °F) by soaking in heated oil (A).
2. Drive out valve guide using suitable tools. WARNING:
Cylinder head contai ns heat, when workin g, wear protective
equipment to avoid getting burned. Standard
Intake : 5.465 - 5.480 mm (0.2152 - 0.2157 in)
Exhaust : 5.455 - 5.470 mm (0.2148 - 0.2154 in) PBIC3213J
Standard
: 5.500 - 5.518 mm (0.2165 - 0.2172 in)
Valve guide clearance:
Standard Intake : 0.020 - 0.053 mm (0.0008 - 0.0021 in)
Exhaust : 0.030 - 0.063 mm (0.0012 - 0.0025 in)
Limit : 0.1 mm (0.004 in) PBIC3214J
SEM931C

EM-192< SERVICE INFORMATION >
[MR18DE]
CYLINDER HEAD
3. Ream cylinder head valve guide hole using suitable tool (A).
4. Heat cylinder head to 110 ° to 130 °C (230 ° to 266 °F) by soaking
in heated oil (A).
5. Press valve guide (1) from camshaft side to dimensions as shown.
WARNING:
Cylinder head contains heat, when working, wear protective
equipment to avoid getting burned.
6. Apply reamer finish to valve guide using suitable tool (A).
VALVE SEAT CONTACT
• After confirming that the dimensions of valve guides and valves are within specifications, perform this proce-
dure.
• Apply prussian blue (or white lead) onto contacting surfac e of valve seat to check the condition of the valve
contact on the surface. Valve guide hole diameter (for service parts):
: 9.675 - 9.696 mm (0.3809 - 0.3817 in) PBIC3215J
PBIC3214J
2 : Cylinder head
Projection (H) : 13.35 - 13.65 mm (0.526 - 0.537 in) PBIC3217J
Standard
: 5.500 - 5.518 mm (0.2165 - 0.2172 in) PBIC3215J

CYLINDER HEAD
EM-193
< SERVICE INFORMATION >
[MR18DE] C
D E
F
G H
I
J
K L
M A EM
NP
O
• Check if the contact area band is continuous all around the circum-
ference.
• If not, grind to adjust valve fitti ng and check again. If the contacting
surface still has NG conditions even after the re-check, replace
valve seat.
VALVE SEAT REPLACEMENT When valve seat is removed, replace with oversized [0.5 mm (0.020 in)] valve seat.
1. Bore out old seat until it collapses. Boring shoul d not continue beyond the bottom face of the seat recess
in cylinder head. Set the machine depth stop to ensure this. Refer to EM-227, " Standard and Limit " .
2. Ream cylinder head (1) recess diameter for service valve seat.
• Be sure to ream in circles concentric to the valve guide center.This will enable valve seat to fit correctly.
3. Heat cylinder head to 110 ° to 130 °C (230 ° to 266 °F) by soaking
in heated oil (A).
4. Provide valve seats cooled well with dry ic e. Press-fit valve seat into cylinder head.
WARNING:
• Never touch cold valve seats directly.
• Cylinder head contains heat, wh en working, wear protective equipment to avoid getting burned.
5. Using valve seat cutter set or valve seat grinder, finish valve seat to the specified dimensions. For dimensions, refer to EM-227, " Standard and Limit " .
CAUTION:
When using valve seat cutter, firmly grip the cutter handle
with both hands. Then, press on the contacting surface all
around the circumference to cu t in a single drive. Improper
pressure on the cutter or cutting many different times may
result in staged valve seat.
6. Using compound, grind to adjust valve fitting.
7. Check again for normal contact. SBIA0322E
2 : Valve seat
Oversize [0.5 mm (0.020 in)] Intake : 35.200 - 35.227 mm (1.3858 - 1.3869 in)
Exhaust : 29.200 - 29.227 mm (1.1496 - 1.1507 in) PBIC3218J
PBIC3214J
SEM934C

EM-194< SERVICE INFORMATION >
[MR18DE]
CYLINDER HEAD
VALVE SPRING SQUARENESS
• Set try square along the side of valve spring and rotate the spring. Measure the maximum clearance between the top of valve spring
and try square.
CAUTION:
Never remove valve spring seat from valve spring.
• If it exceeds the limit, replace valve spring (with valve spring seat).
VALVE SPRING DIMENSIONS AND VALVE SPRING PRESSURE LOAD
• Check valve spring pressure with valve spring seat installed at the specified spring height.
CAUTION:
Never remove valve spring seat from valve spring.
Standard:
• If the installation load or load with valve open is out of the standard, replace valve spring (with valve spring seat). Limit: 1.9 mm (0.075 in) PBIC0080E
SEM113
Items Intake Exhaust
Free height 44.90 - 45.10 mm (1.7677 - 1.7755 in) 45.74 - 45.94 mm (1.8007 - 1.8086 in)
Installation height 35.30 mm (1.390 in) 35.30 mm (1.390 in)
Installation load 153 - 173 N (15.6 - 17.6 kg, 34 - 39 lb) 139 - 157 N (14.2 - 16 kg, 31 - 35 lb)
Height during valve open 26.36 mm (1.0377 in) 27.80 mm (1.0944 in)
Load with valve open 335 - 377 N (34.2 - 38.5 kg, 75 - 85 lb) 266 - 297 N (27.1 - 30.3 kg, 60 - 67 lb)
Identification color White Orange

EM-206< SERVICE INFORMATION >
[MR18DE]
CYLINDER BLOCK
• Position each ring with the gap as shown referring to the pis- ton front mark.
CAUTION:
Never contact the rail end gap under the oil ring with the
oil drain cast groove of piston.
• Install second ring with the stamped surface facing upward.
20. Install connecting rod bearing upper (2) and lower (3) to con- necting rod (1) and connecting rod cap (4).
• Install the connecting rod in the dimension shown.
• Make sure that connecting rod bearing oil hole (A) is com- pletely in the inside of connecting rod oil hole chamfered area
(B).
• When installing connecting rod bearings, apply new engine oil to the bearing surface (inside). Do not apply new engine oil to
the back surface, but thoroughly clean it.
NOTE:
• There is no positioning tab.
• Install the connecting rod bearings in the center of connect-
ing rod and connecting rod bearing cap as shown. For ser-
vice operation, the center position can be checked, visually.
21. Install piston and connecting rod assembly to crankshaft. • Position crankshaft pin corresponding to connecting rod to be installed onto the bottom dead center.
• Apply new engine oil sufficiently to the cylinder bore, piston and crankshaft pin.
• Match the cylinder position with the cylinder number (C) on connecting rod to install.
• Install so that front mark (A) on the piston head faces the front of engine.A : Oil ring upper or lower rail gap
B : Front mark
C : Second ring and oil ring spacer gap
D : Top ring gap
E : Stamped mark PBIC3588J
C : Oil hole (connecting rod)
D : Arrow view
: Engine front PBIC4541E
B : Oil hole
D : Big end diameter grade
E : Small end diameter grade
F : Front mark (connecting rod bearing cap) PBIC3587J

EM
NP
O
How to Select Piston and Bearing
INFOID:0000000004307160
DESCRIPTION
• 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 dimens ion 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 procedures.
HOW TO SELECT PISTON
When New Cylinder Block is Used • Check the cylinder bore grade on rear left side of cylinder block (L), and select piston of the same grade.
• If there is a correction stamp mark on the cylinder block, use it as a correct reference.
When Cylinder Block is Reused 1. Measure the cylinder bore inner diameter. Refer to EM-216, " Inspection After Disassembly " .
2. Determine the bore grade by comparing the measur ement with the values under the cylinder bore inner
diameter of the “Piston Selection Table”. Selection points Selection parts Selection items Selection methods
Between cylinder block and
crankshaft Main bearing
Main bearing grade (bearing
thickness) Determined by match of cylin-
der block bearing housing
grade (inner diameter of hous-
ing) and crankshaft journal
grade (outer diameter of jour-
nal)
Between crankshaft and con-
necting rod Connecting rod bearing
Connecting rod bearing grade
(bearing thickness) Combining service grades for
connecting rod big end diame-
ter and crankshaft pin outer di-
ameter determine connecting
rod bearing selection.
Between cylinder block and pis-
ton Piston and piston pin assembly
(piston is available together with
piston pin as an assembly.) Piston grade (piston outer diam-
eter) Piston grade = cylinder bore
grade (inner diameter of bore) A : Correction stamp
B : Standard stamp
C : Cylinder No. 1 bore grade
D : Cylinder No. 2 bore grade
E : Cylinder No. 3 bore grade
F : Cylinder No. 4 bore grade
G : No. 1 main bearing housing grade
H : No. 2 main bearing housing grade
I : No. 3 main bearing housing grade
J : No. 4 main bearing housing grade
K : No. 5 main bearing housing grade
: Engine front

EM-212< SERVICE INFORMATION >
[MR18DE]
CYLINDER BLOCK
Undersize Bearings Usage Guide
• When the specified connecting rod bearing oil clearance is not obtained with standard size connecting rod bearings, use undersize (US) bearings.
• When using undersize (US) bearing, measure the connecting rod bearing inner diameter with bearing
installed, and grind the crankshaft pin so that the connecting rod bearing oil clearance satisfies the standard.
CAUTION:
In grinding crankshaft pin to u se undersize bearings, keep the
fillet R [1.5 - 1.7 mm (0.059 - 0.067 in)] (A).
Bearing undersize table Unit: mm (in)
HOW TO SELECT MAIN BEARING
When New Cylinder Block and Crankshaft are Used 01
UPR 1.494 - 1.497 (0.0588 - 0.0589) Black
Grade and color are different
between upper and lower bear-
ings.
LWR 1.497 - 1.500 (0.0589 - 0.0591) Brown
12 UPR 1.497 - 1.500 (0.0589 - 0.0591) Brown
LWR 1.500 - 1.503 (0.0591 - 0.0592) Green
23 UPR 1.500 - 1.503 (0.0591 - 0.0592) Green
LWR 1.503 - 1.506 (0.0592 - 0.0593) Yellow
34 UPR 1.503 - 1.506 (0.0592 - 0.0593) Yellow
LWR 1.506 - 1.509 (0.0593 - 0.0594) Blue
Grade number Thickness Identification color Remarks PBIC3263J
Size Thickness
US 0.25 (0.0098) 1.623 - 1.631 (0.0639 - 0.0642)

CYLINDER BLOCK
EM-213
< SERVICE INFORMATION >
[MR18DE] C
D E
F
G H
I
J
K L
M A EM
NP
O
1. “Main Bearing Selection Table” rows correspond to main bearing
housing grade on rear left side of cylinder block (L).
• If there is a correction stamp ma rk on cylinder block, use it as
a correct reference.
2. Apply main journal diameter grade stamped on crankshaft front side to column in the “Main Bearing Selection Table”.
3. Read the symbol at the cross point of selected row and column in the “Main Bearing Selection Table”.
CAUTION:
There are two main bearing selection tables. One is for No. 1, 4 and 5 journals and the other is for
No. 2 and 3 journals. Make certain to use the approp riate table. This is due to differences in the
specified clearances.
4. Apply the symbol obtained to the “Main B earing Grade Table” to select main bearing.
NOTE:
Service part is available as a set of both upper and lower.
When Cylinder Block and Crankshaft are Reused 1. Measure the dimensions of the cylinder block ma in bearing housing inner diameter and crankshaft main
journal diameter individually. Refer to EM-216, " Inspection After Disassembly " and
EM-216, " Inspection
After Disassembly " .
2. Apply the measured dimension to t he “Main Bearing Selection Table”.
3. Read the symbol at the cross point of selected row and column in the “Main Bearing Selection Table”.
CAUTION:
There are two main bearing selection tables. One is for No. 1, 4 and 5 journals and the other is for
No. 2 and 3 journals. Make certain to use the ap propriate table. This is due to differences in the
specified clearances.
4. Apply the symbol obtained to the “Main B earing Grade Table” to select main bearing.
NOTE: A : Correction stamp
B : Standard stamp
C : Cylinder No. 1 bore grade
D : Cylinder No. 2 bore grade
E : Cylinder No. 3 bore grade
F : Cylinder No. 4 bore grade
G : No. 1 main bearing housing grade
H : No. 2 main bearing housing grade
I : No. 3 main bearing housing grade
J : No. 4 main bearing housing grade
K : No. 5 main bearing housing grade
: Engine front PBIC3264J
A : No. 1 pin journal diameter grade
B : No. 2 pin journal diameter grade
C : No. 3 pin journal diameter grade
D : No. 4 pin journal diameter grade
E : No. 1 main journal diameter grade
F : No. 2 main journal diameter grade
G : No. 3 main journal diameter grade
H : No. 4 main journal diameter grade
I : No. 5 main journal diameter grade PBIC3261J