Nissan Juke F15. Instruction — part 643
EM-126
< UNIT DISASSEMBLY AND ASSEMBLY >
[MR FOR NISMO RS MODELS]
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 measured value is out of the standard, 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
EM-134, "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 enter 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 installed, and tighten main bearing cap mounting bolts to the
specified torque. Refer to
EM-115, "Disassembly and Assembly"
.
• Measure the inner diameter of main bearing housing with a bore gauge.
• Measure the position shown in the figure [5 mm (0.20 in)] back-
ward from main bearing housing front side in the 2 directions as
shown in the figure. The smaller one is the measured value.
• If out of the standard, replace cylinder block and main bearing
caps assembly.
NOTE:
Main bearing caps cannot be replaced as a single, because it is machined together with cylinder block.
PISTON TO CYLINDER BORE CLEARANCE
Standard :
PBIC3266J
Standard and Limit
: Refer to
Limit :
Refer
.
PBIC3250J
1
: Cylinder block
2
: Main bearing cap
: Engine front
Standard :
PBIC4005E
CYLINDER BLOCK
EM-127
< UNIT DISASSEMBLY AND ASSEMBLY >
[MR FOR NISMO RS MODELS]
C
D
E
F
G
H
I
J
K
L
M
A
EM
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P
O
Cylinder Bore Inner Diameter
• Using a bore gauge, measure the cylinder bore for wear, out-of-
round and taper at six different points on each cylinder. [(A) and (B)
directions at (C), (D), and (E)] [(A) is in longitudinal direction of
engine]
NOTE:
When determining cylinder bore grade, measure the cylinder bore
(B) direction at (D) 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 (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
.
f
: 10 mm (0.39 in)
g
: 60 mm (2.36 in)
h
: 130 mm (5.12 in)
Standard:
Cylinder bore inner diameter
: Refer to
.
Limit:
Out-of-round [Difference between (A) and (B)]
Taper [Difference between (C) and (D)]
: Refer to
.
JPBIA2059ZZ
Standard :
PBIC3272J
A : Direction A
C : Position C
E : Position E
f
: 10 mm (0.39 in)
g
: 60 mm (2.36 in)
h
: 130 mm (5.12 in)
Standard and Limit
: Refer to
.
JPBIA2059ZZ
EM-128
< UNIT DISASSEMBLY AND ASSEMBLY >
[MR FOR NISMO RS MODELS]
CYLINDER BLOCK
CRANKSHAFT MAIN JOURNAL DIAMETER
• 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
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
EM-148, "Connecting Rod Bearing"
.
OUT-OF-ROUND AND TAPER OF CRANKSHAFT
• Measure the dimensions at four different points as shown in the
figure 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
EM-134, "Connecting Rod Bearing"
.
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 :
PBIC3457J
Standard :
Limit:
Out-of-round [Difference between (X) and (Y)]
Taper [Difference between (A) and (B)]
: Refer to
.
PBIC3459J
Standard and Limit
: Refer to
PBIC3458J
CYLINDER BLOCK
EM-129
< UNIT DISASSEMBLY AND ASSEMBLY >
[MR FOR NISMO RS MODELS]
C
D
E
F
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• Install connecting rod bearings (2) to connecting rod (3) and con-
necting rod bearing cap (1), and tighten connecting rod cap bolts to
the specified torque. Refer to
EM-115, "Disassembly and Assem-
• 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
.
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-
EM-115, "Disassembly and Assembly"
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 mounting bolts to the specified
EM-115, "Disassembly and Assembly"
.
• Measure the inner diameter of main bearing with a bore gauge.
(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 mounting bolts to
the specified torque. Refer to
EM-115, "Disassembly and Assembly"
A
: Example
B
: Inner diameter measuring direction
Standard and Limit : Refer to
EM-148, "Connecting Rod Bearing"
PBIC3275J
JPBIA4438ZZ
A
: Example
B
: Inner diameter measuring direction
Standard and Limit : Refer to
.
PBIC3277J
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