Infiniti EX35. Manual — part 731
CYLINDER BLOCK
EM-123
< DISASSEMBLY AND ASSEMBLY >
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18. Install knock sensors.
• Install knock sensor so that connector faces rear of the
engine.
• After installing knock sensor, connect harness connector, and
lay it out to rear of the engine.
CAUTION:
• Never tighten mounting bolts while holding connector.
• If any impact by dropping is applied to knock sensor,
replace it with new one.
NOTE:
• Check that there is no foreign material on the cylinder block
mating surface and the back surface of knock sensor.
• Check that knock sensor does not interfere with other parts.
19. Note the following, assemble in the reverse order of disassembly after this step.
Drive plate
• When installing drive plate to crankshaft, be sure to correctly align crankshaft side dowel pin and drive
plate side dowel pin hole.
CAUTION:
If these are not aligned correctly, engine runs roughly and “MIL” turns on.
• Install drive plate (2) and reinforcement plate (3) as shown in
the figure.
• Holding ring gear with the ring gear stopper [SST:
KV10118600 (J-48641)].
• Tighten the mounting bolts crosswise over several times.
Inspection
INFOID:0000000003139149
CRANKSHAFT END PLAY
• Measure the clearance between thrust bearings and crankshaft
arm when crankshaft is moved fully forward or backward with a dial
indicator.
• If the measured value exceeds the limit, replace thrust bearings,
and measure again. If it still exceeds the limit, replace crankshaft
also.
CONNECTING ROD SIDE CLEARANCE
A
: Bank 1
B
: Bank 2
: Engine front
JPBIA0211ZZ
1
: Ring gear
4
: Pilot converter
5
: Crankshaft
A
: Rounded
: Engine front
JPBIA0212ZZ
Standard and limit
: Refer to
.
PBIC2953E
EM-124
< DISASSEMBLY AND ASSEMBLY >
CYLINDER BLOCK
• Measure the side clearance between connecting rod and crank-
shaft arm with a feeler gauge.
• If the measured value exceeds the limit, replace connecting rod,
and measure again. If it still exceeds the limit, replace crankshaft
also.
PISTON TO PISTON PIN OIL CLEARANCE
Piston Pin Hole Diameter
Measure the inner diameter of piston pin hole with an inside
micrometer (A).
Piston Pin Outer Diameter
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
Standard and limit
: Refer to
PBIC2954E
Standard
: Refer to
JPBIA0217ZZ
Standard
: Refer to
JPBIA0218ZZ
Standard
: Refer to
CYLINDER BLOCK
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< DISASSEMBLY AND ASSEMBLY >
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• 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
• Check with a connecting rod aligner.
• If it exceeds the limit, replace connecting rod assembly.
CONNECTING ROD BIG END DIAMETER
A
: NG
B
: OK
Standard and limit
: Refer to
.
JPBIA0219ZZ
A
: Press-fit
C
: Measuring point
Standard and limit
: Refer to
JPBIA0220ZZ
A
: Bend
B
: Torsion
C
: Feeler gauge
Bend limit
: Refer to
Torsion limit
JPBIA0221ZZ
EM-126
< DISASSEMBLY AND ASSEMBLY >
CYLINDER BLOCK
• Install connecting rod bearing cap without installing connecting rod
bearing, and tightening connecting rod bolts to the specified
torque. Refer to
EM-115, "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
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.
1
: Connecting rod
Standard
: Refer to
JPBIA0222ZZ
Standard
: Refer to
JPBIA0223ZZ
Standard
: Refer to
JPBIA0218ZZ
Standard and limit
: Refer to
A
: Sample codes
B
: Bearing stopper groove
C
: Small-end diameter grade
D
: Big-end diameter grade
E
: Weight grade
F
: Cylinder No.
G
: Management code
JPBIA0208ZZ
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