Nissan Cube. Manual - part 424

EM-100

< UNIT DISASSEMBLY AND ASSEMBLY >

CYLINDER BLOCK

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 

EM-106, "Pis-

ton"

.

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 

EM-122, "Main Bearing"

.

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 

EM-122, "Connecting Rod Bearing"

.

OUT-OF-ROUND AND TAPER OF CRANKSHAFT

Standard : 

Refer 

to 

EM-118, "Cylinder Block"

.

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 

EM-118, "Cylinder Block"

.

JPBIA2059ZZ

Standard : 

Refer 

to 

EM-118, "Cylinder Block"

.

PBIC3457J

Standard : 

Refer 

to 

EM-118, "Cylinder Block"

.

CYLINDER BLOCK

EM-101

< UNIT DISASSEMBLY AND ASSEMBLY >

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• 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-107, "Connecting Rod Bearing"

 and/or 

EM-109,

"Main 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

• 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-87, "Disassembly and Assem-

bly"

. 

• 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 

EM-107,

"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.

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

fied torque. Refer to 

EM-87, "Disassembly and Assembly"

.

CAUTION:

Never rotate crankshaft.

Limit:

Out-of-round [Difference between (X) and (Y)]

Taper [Difference between (A) and (B)]

: Refer to 

EM-118, "Cylinder Block"

.

PBIC3459J

Standard and Limit

: Refer to 

EM-118, "Cylinder 

Block"

.

PBIC3458J

A

: Example

B

: Inner diameter measuring direction

Standard and Limit 

:  Refer  to 

EM-122, "Connecting Rod Bearing"

.

PBIC3275J

EM-102

< UNIT DISASSEMBLY AND ASSEMBLY >

CYLINDER BLOCK

• 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
torque. Refer to 

EM-87, "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 

EM-109, "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 mounting bolts to

the specified torque. Refer to 

EM-87, "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 

PBIC3276J

A

: Example

B

: Inner diameter measuring direction

Standard and Limit

: Refer to 

EM-122, "Main Bearing"

.

PBIC3277J

PBIC3278J

CYLINDER BLOCK

EM-103

< UNIT DISASSEMBLY AND ASSEMBLY >

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• 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 

EM-87, "Disassembly and

Assembly"

.

• 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 

EM-87, "Disassembly

and Assembly"

.

• If the standard is not met, replace connecting rod bearings.

MAIN BEARING CAP BOLT OUTER DIAMETER 

• Measure the outer diameters (d

1

) and (d

2

) at two positions as

shown in the figure.

• If reduction appears in places other than (B) range, regard it as

(d

2

).

• If it exceeds the limit (a large difference in dimensions), replace

main bearing cap mounting bolt with a new one.

CONNECTING ROD CAP BOLT OUTER DIAMETER 

• Measure the outer diameter (d) at position as shown in the figure.
• If reduction appears in a position other than (d), regard it as (d).

• When (d) exceeds the limit (when it becomes thinner), replace

connecting rod cap bolt with a new one.

CLOGGED OR DAMAGED OIL FILTER (FOR INTAKE VALVE TIMING CONTROL)

A

: Example

Standard

: There must be crush height.

PBIC3279J

A

: Example

Standard

: There must be crush height.

PBIC3279J

A

: (d1) measuring position

B

: (d2) measuring position

Limit [(d

1

) – (d

2

)]: 0.15 mm (0.0059 in) 

PBIC4015E

Limit: 7.75 mm (0.3051 in) 

PBIC4016E