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Nissan Qashqai (2007-2010). Manual - part 39

EM-104

< DISASSEMBLY AND ASSEMBLY >

[HR16DE]

CYLINDER BLOCK

Measure the outer diameter of piston pin with a micrometer.

Connecting Rod Small End Clearance

(Connecting rod small end clearance) = (Connecting rod small end 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 connecting rod assembly, refer to "CONNECTING ROD BEARING OIL CLEARANCE" to select

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 and a feeler
gauge.

• 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 bolts to the specified

torque. Refer to

EM-94, "Disassembly and Assembly"

• Measure the position shown in the figure [5 mm (0.196 in) rear-

ward from main bearing housing front side end surface) 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 as an assembly.
NOTE:
These components cannot be replaced as a single unit, because they were processed together.

PISTON TO CYLINDER BORE CLEARANCE

Standard

: Refer to

EM-120, "Cylinder Block"

PBIC0117E

Standard

: Refer to

EM-120, "Cylinder Block"

Limit

: Refer to

EM-120, "Cylinder Block"

PBIC0121E

: Cylinder block

: Main bearing cap

: Engine front

Standard

: Refer to

EM-120, "Cylinder Block"

PBIC3879E

CYLINDER BLOCK

EM-105

< DISASSEMBLY AND ASSEMBLY >

[HR16DE]

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. (“X” and
“Y” directions at “A”, “B” and “C”) (“Y” is in longitudinal direction of
the engine)

NOTE:
When determining cylinder bore grade, measure cylinder bore at
“B” 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:
There is no service setting for oversized piston.

Piston Skirt Diameter

Measure the outer diameter of piston skirt with a micrometer.

Piston to Cylinder Bore Clearance

Calculate by piston skirt diameter and cylinder bore inner diameter (direction “X”, position “B”).
(Clearance) = (Cylinder bore inner diameter) – (Piston skirt diameter)

• If it exceeds the limit, replace piston and piston pin assembly and/or 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 "MAIN BEARING OIL
CLEARANCE".

: Unit: mm (in)

Standard:

Cylinder bore inner diameter

: Refer to

EM-120, "Cylinder Block"

Limit:

Out-of-round (Difference between“X”and“Y”)

Taper (Difference between“A”and“B”

: Refer to

EM-120, "Cylinder Block"

PBIC3767E

Standard

: Refer to

EM-120, "Cylinder Block"

PBIC0125E

Standard and Limit

: Refer to

EM-120, "Cylinder Block"

Standard

: Refer to

EM-120, "Cylinder Block"

PBIC3457J

EM-106

< DISASSEMBLY AND ASSEMBLY >

[HR16DE]

CYLINDER BLOCK

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

to "CONNECTING ROD BEARING OIL CLEARANCE".

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 "MAIN BEARING OIL CLEARANCE" and/or "CON-
NECTING ROD BEARING OIL CLEARANCE".

CRANKSHAFT RUNOUT

• Place a V-block on a precise flat table to support the journals on

the both end of 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

• Install connecting rod bearings to connecting rod and cap, and tighten connecting rod bolts to the specified

torque. Refer to

EM-94, "Disassembly and Assembly"

• 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 the clearance exceeds the limit, select proper connecting rod

bearing according to connecting rod big end diameter and crank-
shaft pin journal diameter to obtain the specified bearing oil clear-
ance. Refer to

EM-110, "Connecting Rod Bearing"

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.

Standard

: Refer to

EM-120, "Cylinder Block"

Limit:

Out-of-round (Difference between“X”and“Y”)

Taper (Difference between“A”and“B”)

: Refer to

EM-120, "Cylinder Block"

PBIC3459J

Limit

: Refer to

EM-120, "Cylinder Block"

PBIC3458J

Standard and Limit

: Refer to

EM-123, "Connecting Rod Bearing"

PBIC1642E

CYLINDER BLOCK

EM-107

< DISASSEMBLY AND ASSEMBLY >

[HR16DE]

• Install connecting rod bearings to connecting rod and cap, and tighten connecting rod bolts to the specified

torque. Refer to

EM-94, "Disassembly and Assembly"

CAUTION:

Never rotate crankshaft.

• Remove connecting rod cap and bearing, and using the scale 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 to cylinder block and main bearing cap, and tighten main bearing cap bolts to the spec-

ified torque. Refer to

EM-94, "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 the clearance exceeds the limit, select proper main bearing

according to main bearing inner diameter and crankshaft main
journal diameter to obtain the specified bearing oil clearance.
Refer to

EM-112, "Main Bearing"

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 bolts to the spec-

ified torque. Refer to

EM-94, "Disassembly and Assembly"

CAUTION:

Never rotate crankshaft.

• Remove main bearing cap and bearings, and using the scale 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

PBIC1149E

Standard

: Refer to

EM-124, "Main Bearing"

PBIC1644E

PBIC1149E

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