Nissan Qashqai J11. Manual — part 42
CYLINDER BLOCK
EM-107
< UNIT DISASSEMBLY AND ASSEMBLY >
[HRA2DDT]
C
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• 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
• 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-93, "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-93, "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
Standard and Limit
: Refer to
PBIC3458J
A
: Example
B
: Inner diameter measuring direction
Standard and Limit
: Refer to
EM-121, "Connecting Rod Bearing"
PBIC3275J
PBIC3276J
EM-108
< UNIT DISASSEMBLY AND ASSEMBLY >
[HRA2DDT]
CYLINDER BLOCK
• Install main bearings (3) to cylinder block (1) and main bearing cap
(2), and tighten main bearing cap mounting bolts to the specified
torque. Refer to
EM-93, "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-93, "Disassembly and Assembly"
.
CAUTION:
Never rotate crankshaft.
• Remove main bearing cap and bearings, 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 CRUSH HEIGHT
• When main bearing cap is removed after being tightened to the
specified torque with main bearings (1) installed, the tip end of
bearing must protrude (B). Refer to
• If the standard is not met, replace main bearings.
CONNECTING ROD BEARING CRUSH HEIGHT
• When connecting rod cap is removed after being tightened to the
specified torque with connecting rod bearings (1) installed, the tip
end of bearing must protrude (B). Refer to
.
• If the standard is not met, replace connecting rod bearings.
A
: Example
B
: Inner diameter measuring direction
Standard and Limit
: Refer to
.
PBIC3277J
PBIC3278J
A
: Example
Standard
: There must be crush height.
PBIC3279J
A
: Example
Standard
: There must be crush height.
PBIC3279J
CYLINDER BLOCK
EM-109
< UNIT DISASSEMBLY AND ASSEMBLY >
[HRA2DDT]
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CLOGGED OR DAMAGED OIL FILTER (FOR INTAKE VALVE TIMING CONTROL)
• Check that there is no foreign material on the oil filter and check it
for clogging.
- Clean it if necessary.
• Check the oil filter for damage.
- Replace it if necessary.
PBIC3273J
EM-110
< UNIT DISASSEMBLY AND ASSEMBLY >
[HRA2DDT]
HOW TO SELECT PISTON AND BEARING
HOW TO SELECT PISTON AND BEARING
Description
INFOID:0000000010282253
• 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 dimension 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, refer to the text.
Connecting Rod Bearing
INFOID:0000000010282254
WHEN NEW CONNECTING ROD AND CRANKSHAFT ARE USED
1.
Apply connecting rod big end diameter grade stamped (C) on
connecting rod side face to the row in the “Connecting Rod
Bearing Selection Table”.
2.
Apply crankshaft pin journal diameter grade stamped (B) on
crankshaft front side to the column in the “Connecting Rod Bear-
ing Selection Table”.
3.
Read the symbol at the cross point of selected row and column in the “Connecting Rod Bearing Selection
Table”.
4.
Apply the symbol obtained to the “Connecting Rod Bearing Grade Table” to select connecting rod bearing.
WHEN CONNECTING ROD AND CRANKSHAFT ARE REUSED
1.
Measure the dimensions of the connecting rod big end diameter and crankshaft pin journal diameter indi-
vidually. Refer to
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.
A
: Oil hole
B
: Cylinder number
D
: Front mark
PBIC3756E
A
: Main journal diameter grade (No. 1 to 5 from left)
B
: Crankshaft pin journal diameter grade (No. 1 to 4 from left)
PBIC3757E
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