Nissan Qashqai (2007-2010). Manual — part 40

EM-108

< DISASSEMBLY AND ASSEMBLY >

[HR16DE]

CYLINDER BLOCK

• When main bearing cap is removed after being tightened to the

specified torque with main bearings installed, the tip end of bearing
must protrude. Refer to

EM-94, "Disassembly and Assembly"

.

• If the standard is not met, replace main bearings.

CONNECTING ROD BEARING CRUSH HEIGHT

• When connecting rod bearing cap is removed after being tightened

to the specified torque with connecting rod bearings installed, the
tip end of bearing must protrude. Refer to

EM-94, "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

”, “d

2”

) at two positions as shown

in the figure.

• If reduction appears in a position other than “d

2 ”

, regard it as “d

2”

.

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

main bearing cap 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” falls below the limit (when it becomes thinner), replace

connecting rod cap bolt with a new one.

FLYWHEEL DEFLECTION

Standard: There must be crush height.

SEM502G

Standard: There must be crush height.

PBIC1646E

Limit (“d

1

”–“d

2

”): 0.2 mm (0.008 in)

PBIC3768E

Limit: 7.75 mm (0.3051 in)

PBIC3769E

CYLINDER BLOCK

EM-109

< DISASSEMBLY AND ASSEMBLY >

[HR16DE]

C

D

E

F

G

H

I

J

K

L

M

A

EM

N

P

O

• Measure the deflection of flywheel contact surface to clutch with a

dial indicator.

• If measured value is out of the standard, replace flywheel.

Standard

: 0.25 mm (0.0098 in) or less.

PBIC2646E

EM-110

< DISASSEMBLY AND ASSEMBLY >

[HR16DE]

HOW TO SELECT PISTON AND BEARING

HOW TO SELECT PISTON AND BEARING

Description

INFOID:0000000000893893

• 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:0000000000893895

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

EM-101, "Inspection"

.

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

HOW TO SELECT PISTON AND BEARING

EM-111

< DISASSEMBLY AND ASSEMBLY >

[HR16DE]

C

D

E

F

G

H

I

J

K

L

M

A

EM

N

P

O

2.

Apply the measured dimension to the “Connecting Rod Bearing 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.

Connecting Rod Bearing Selection Table

Connecting Rod Bearing Grade Table

Undersize Bearings Usage Guide

• When the specified connecting rod bearing oil clearance is not obtained with standard size connecting rod

bearings, use undersize (US) bearings.

• When using undersize (US) bearing, measure the connecting rod bearing inner diameter with bearing

installed, and grind the crankshaft pin so that the connecting rod bearing oil clearance satisfies the standard.

CAUTION:

PBIC3758E

Connecting Rod Bearing Grade Table

: Refer to

EM-123, "Connecting Rod Bearing"

.