Nissan Qashqai (2007-2010). Manual — part 71

EM-232

< DISASSEMBLY AND ASSEMBLY >

[MR20DE]

HOW TO SELECT PISTON AND BEARING

In grinding crankshaft pin to use undersize bearings, keep the
fillet R [1.5 - 1.7 mm (0.059 - 0.067 in)] (A).

Main Bearing

INFOID:0000000000893977

WHEN NEW CYLINDER BLOCK AND CRANKSHAFT ARE USED

1.

“Main Bearing Selection Table” rows correspond to main bearing
housing grade on rear left side of cylinder block (L).

• If there is a correction stamp mark on cylinder block, use it as

a correct reference.

2.

Apply main journal diameter grade stamped on crankshaft front
side to column in the “Main Bearing Selection Table”.

3.

Read the symbol at the cross point of selected row and column in the “Main Bearing Selection Table”.

CAUTION:

There are two main bearing selection tables. One is for No. 1, 4 and 5 journals and the other is for
No. 2 and 3 journals. Make certain to use the appropriate table. This is due to differences in the
specified clearances.

Bearing undersize table

: Refer to

EM-244, "Connecting Rod Bear-

ing"

PBIC3263J

A

: Correction stamp

B

: Standard stamp

C

: Cylinder No. 1 bore grade

D

: Cylinder No. 2 bore grade

E

: Cylinder No. 3 bore grade

F

: Cylinder No. 4 bore grade

G

: No. 1 main bearing housing grade

H

: No. 2 main bearing housing grade

I

: No. 3 main bearing housing grade

J

: No. 4 main bearing housing grade

K

: No. 5 main bearing housing grade

: Engine front

PBIC3264J

A

: No. 1 pin journal diameter grade

B

: No. 2 pin journal diameter grade

C

: No. 3 pin journal diameter grade

D

: No. 4 pin journal diameter grade

E

: No. 1 main journal diameter grade

F

: No. 2 main journal diameter grade

G

: No. 3 main journal diameter grade

H

: No. 4 main journal diameter grade

I

: No. 5 main journal diameter grade

PBIC3261J

HOW TO SELECT PISTON AND BEARING

EM-233

< DISASSEMBLY AND ASSEMBLY >

[MR20DE]

C

D

E

F

G

H

I

J

K

L

M

A

EM

N

P

O

4.

Apply the symbol obtained to the “Main Bearing Grade Table” to select main bearing.
NOTE:
Service part is available as a set of both upper and lower.

WHEN CYLINDER BLOCK AND CRANKSHAFT ARE REUSED

1.

Measure the dimensions of the cylinder block main bearing housing inner diameter and crankshaft main
journal diameter individually. Refer to

EM-219, "Inspection"

.

2.

Apply the measured dimension to the “Main Bearing Selection Table”.

3.

Read the symbol at the cross point of selected row and column in the “Main Bearing Selection Table”.

CAUTION:

There are two main bearing selection tables. One is for No. 1, 4 and 5 journals and the other is for
No. 2 and 3 journals. Make certain to use the appropriate table. This is due to differences in the
specified clearances.

4.

Apply the symbol obtained to the “Main Bearing Grade Table” to select main bearing.
NOTE:
Service part is available as a set of both upper and lower.

MAIN BEARING SELECTION TABLE (No. 1, 4 AND 5 JOURNAL)

PBIC4078E

EM-234

< DISASSEMBLY AND ASSEMBLY >

[MR20DE]

HOW TO SELECT PISTON AND BEARING

MAIN BEARING SELECTION TABLE (No. 2 AND 3 JOURNAL)

MAIN BEARING GRADE TABLE (ALL JOURNALS)

UNDERSIZE BEARING USAGE GUIDE

• When the specified main bearing oil clearance is not obtained with standard size main bearings, use under-

size (US) bearing.

• When using undersize (US) bearing, measure the main bearing inner diameter with bearing installed, and

grind main journal so that the main bearing oil clearance satisfies the standard.

CAUTION:

PBIC4079E

Main bearing grade table (All journals)

: Refer to

EM-245, "Main Bearing"

.

HOW TO SELECT PISTON AND BEARING

EM-235

< DISASSEMBLY AND ASSEMBLY >

[MR20DE]

C

D

E

F

G

H

I

J

K

L

M

A

EM

N

P

O

In grinding crankshaft main journal to use undersize bearings,
keep the fillet R [1.5 - 1.7 mm (0.059 - 0.067 in)] (A).

Bearing undersize table:

Refer to

EM-245, "Main Bearing"

.

PBIC3263J