Nissan Teana J32. Manual — part 499
EM-120
< DISASSEMBLY AND ASSEMBLY >
CYLINDER BLOCK
Measure the outer diameter of piston pin with a micrometer (A).
Piston to Piston Pin Oil Clearance
(Piston to piston pin oil clearance) = (Piston pin hole diameter) – (Piston pin outer diameter)
• If the calculated value is out of the standard, replace piston and piston pin assembly.
• When replacing piston and piston pin assembly, refer to
.
NOTE:
• Piston is available together with piston pin as assembly.
• Piston pin (piston pin hole) grade is provided only for the parts installed at the plant. For service parts, no
piston pin grades can be selected. (Only “0” grade is available.)
PISTON RING SIDE CLEARANCE
• Measure the side clearance of piston ring (1) and piston ring
groove with a feeler gauge (C).
• If the measured value exceeds the limit, replace piston ring, and
measure again. If it still exceeds the limit, replace piston also.
PISTON RING END GAP
• Check that the cylinder bore inner diameter is within the specification. Refer to
• Lubricate with new engine oil to piston (1) and piston ring (2), and
then insert piston ring until middle of cylinder with piston, and mea-
sure the piston ring end gap with a feeler gauge (B).
• If the measured value exceeds the limit, replace piston ring, and
measure again. If it still exceeds the limit, rebore cylinder and use
oversize piston and piston rings.
CONNECTING ROD BEND AND TORSION
Standard
: Refer to
JPBIA0218ZZ
Standard
: Refer to
A
: NG
B
: OK
Standard and limit
: Refer to
.
JPBIA0219ZZ
A
: Press-fit
C
: Measuring point
Standard and limit
: Refer to
JPBIA0220ZZ
CYLINDER BLOCK
EM-121
< DISASSEMBLY AND ASSEMBLY >
C
D
E
F
G
H
I
J
K
L
M
A
EM
N
P
O
• Check with a connecting rod aligner.
• If it exceeds the limit, replace connecting rod assembly.
CONNECTING ROD BIG END DIAMETER
• Install connecting rod bearing cap without installing connecting rod
bearing, and tightening connecting rod bolts to the specified
torque. Refer to
EM-110, "Disassembly and Assembly"
for the
tightening procedure.
• Measure the inner diameter of connecting rod big end with an
inside micrometer.
• If out of the standard, replace connecting rod assembly.
CONNECTING ROD BUSHING OIL CLEARANCE
Connecting Rod Bushing Inner Diameter
Measure the inner diameter of connecting rod bushing with an inside
micrometer (A).
Piston Pin Outer Diameter
A
: Bend
B
: Torsion
C
: Feeler gauge
Bend limit
: Refer to
Torsion limit
JPBIA0221ZZ
1
: Connecting rod
Standard
: Refer to
JPBIA0222ZZ
Standard
: Refer to
JPBIA0223ZZ
EM-122
< DISASSEMBLY AND ASSEMBLY >
CYLINDER BLOCK
Measure the outer diameter of piston pin with a micrometer (A).
Connecting Rod Bushing Oil Clearance
(Connecting rod bushing oil clearance) = (Connecting rod bushing inner diameter) – (Piston pin outer diame-
ter)
• If the calculated value exceeds the limit, replace connecting rod assembly and/or piston and piston pin
assembly.
• If replacing piston and piston pin assembly, refer to
• If replacing connecting rod assembly, refer to
to select the connecting rod bearing.
Factory installed parts grading:
• Service parts apply only to grade “0”.
- VQ25DE
- VQ35DE
Standard
: Refer to
JPBIA0218ZZ
Standard and limit
: Refer to
A
: Sample codes
B
: Bearing stopper groove
C
: Small-end diameter grade
D
: Standard stamp
E
: Weight grade
F
: Cylinder No.
G
: Management code
H
: Front mark
I
: Management code
JPBIA0208ZZ
A
: Piston grade number
B
: Front mark
C
: Piston pin grade number
D
: Identification code
JPBIA2198ZZ
A
: Piston grade number
B
: Front mark
C
: Piston pin grade number
D
: Identification code
JPBIA2199ZZ
CYLINDER BLOCK
EM-123
< DISASSEMBLY AND ASSEMBLY >
C
D
E
F
G
H
I
J
K
L
M
A
EM
N
P
O
Unit: mm (in)
*: After installing in connecting rod
CYLINDER BLOCK 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 enter engine oil or engine coolant passages.
• Measure the distortion on the cylinder block upper face at some
different points in six directions (C), (D), (E), (F), (G) and (H) with a
straightedge (A) and a feeler gauge (B).
• If it exceeds the limit, replace cylinder block.
MAIN BEARING HOUSING INNER DIAMETER
• Install main bearing caps (2) and main bearing beam without
installing main bearings, and tighten main bearing cap bolts to the
specified torque. Refer to
EM-110, "Disassembly and Assembly"
for the tightening procedure.
• Measure the inner diameter of main bearing housing with a bore
gauge.
• If out of the standard, replace cylinder block (1) and main bearing
caps as assembly.
NOTE:
Cylinder block cannot be replaced as a single part, because it is
machined together with main bearing caps.
PISTON TO CYLINDER BORE CLEARANCE
Cylinder Bore inner Diameter
• Using a bore gauge, measure cylinder bore for wear, out-of-round
and taper at six different points on each cylinder. [(A) and (B) direc-
tions at (C), (D) and (E)] is in longitudinal direction of engine.
Grade
0
1
Connecting rod bushing inner diameter *
22.000 - 22.006
(0.8661 - 0.8664)
22.006 - 22.012
(0.8664 - 0.8666)
Piston pin hole diameter
21.993 - 21.999
(0.8659 - 0.8661)
21.999 - 22. 005
(0.8661 - 0.8663)
Piston pin outer diameter
21.989 - 21.995
(0.8657 - 0.8659)
21.995 - 22.001
(0.8659 - 0.8662)
Limit
: Refer to
JPBIA0224ZZ
Standard
: Refer to
.
JPBIA0225ZZ
f
: 10 mm (0.39 in)
g
: 60 mm (2.36 in)
h
: 120 mm (4.72 in)
Standard and limit
: Refer to
JPBIA0226ZZ
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