Nissan Qashqai J11. Manual - part 41

CYLINDER BLOCK

EM-103

< UNIT DISASSEMBLY AND ASSEMBLY >

[HRA2DDT]

C

D

E

F

G

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• If oil clearance is out of the standard, replace piston and piston pin assembly. 
• When replacing piston and piston pin assembly. Refer to 

″″

.

NOTE:
• Piston is available together with piston pin as assembly.
• Piston pin (piston pin hole) grade is provided only for the parts installed at the plant. For service parts, no

grades can be selected. (Only grade “0” is available.) 

PISTON RING SIDE CLEARANCE

• Measure the side clearance of piston ring and piston ring groove

with a feeler gauge (A).

• If the measured value exceeds the limit, replace piston ring.

PISTON RING END GAP

• Check that cylinder bore inner diameter is within specification. Refer to “PISTON TO CYLINDER BORE

CLEARANCE”.

• Lubricate with new engine oil to piston (1) and piston ring (2), and

then insert (A) piston ring until middle of cylinder (B) with piston,
and measure piston ring end gap with a feeler gauge (C).

• If the measured value exceeds the limit, replace piston ring, and

measure again. If it still exceeds the limit, replace cylinder block.

CONNECTING ROD BIG END DIAMETER

• Install connecting rod cap (1) without connecting rod bearing

installed, and tightening connecting rod cap bolts to the specified
torque. Refer to 

EM-93, "Exploded View"

.

• Measure the inner diameter of connecting rod big end with an

inside micrometer.

• If out of the standard, replace connecting rod assembly.

CONNECTING ROD BUSHING OIL CLEARANCE

Connecting Rod Bushing Inner Diameter

Standard and Limit

: Refer to 

EM-118, "Cylinder 

Block"

.

PBIC3280J

Standard and Limit

: Refer to 

EM-118, "Cylinder 

Block"

.

PBIC3267J

2

: Connecting rod

A

: Example

B

: Measuring direction of inner diameter

Standard : 

Refer 

to 

EM-118, "Cylinder Block"

.

PBIC3269J

EM-104

< UNIT DISASSEMBLY AND ASSEMBLY >

[HRA2DDT]

CYLINDER BLOCK

Measure the inner diameter of connecting rod bushing with an inside
micrometer (A).

Piston Pin Outer Diameter

Measure the outer diameter of piston pin with a micrometer (A).

Connecting Rod Bushing Oil Clearance

(Connecting rod bushing oil clearance) = (Connecting rod bushing 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 piston and piston pin assembly. Refer to 

EM-118, "Cylinder Block"

.

• If replacing connecting rod assembly. Refer to 

EM-121, "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 (A) and feeler
gauge (B).

• 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 mounting bolts to the

specified torque. Refer to 

EM-93, "Disassembly and Assembly"

.

• Measure the inner diameter of main bearing housing with a bore gauge. 

Standard : 

Refer 

to 

EM-118, "Cylinder Block"

.

JPBIA0223ZZ

Standard : 

Refer 

to 

EM-118, "Cylinder Block"

.

JPBIA0218ZZ

Standard and Limit 

: Refer to 

EM-118, "Cylinder Block"

.

Limit : 

Refer 

to 

EM-118, "Cylinder Block"

.

JPBIA0224ZZ

CYLINDER BLOCK

EM-105

< UNIT DISASSEMBLY AND ASSEMBLY >

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• Measure the position shown in the figure [5 mm (0.20 in)] back-

ward from main bearing housing front side 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 assembly. 
NOTE:
Main bearing caps cannot be replaced as a single, because it is machined together with cylinder block.

PISTON TO CYLINDER BORE CLEARANCE

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. [(A) and (B)
directions at (C), (D), and (E)] [(A) is in longitudinal direction of
engine]

NOTE:
When determining cylinder bore grade, measure the cylinder bore
(B) direction at (D) 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:
Oversize piston is not provided.

Piston Skirt Diameter

Measure the outer diameter of piston skirt with a micrometer (A).

Piston to Cylinder Bore Clearance

1

: Cylinder block

2

: Main bearing cap

: Engine front

Standard : 

Refer 

to 

EM-118, "Cylinder Block"

.

PBIC4005E

f

: 10 mm (0.39 in)

g

: 60 mm (2.36 in)

h

: 120 mm (4.72 in)

Standard:

Cylinder bore inner diameter 

: Refer to 

EM-118, "Cylinder Block"

.

Limit:

Out-of-round [Difference between (A) and (B)]

Taper [Difference between (C) and (D)]

: Refer to 

EM-118, "Cylinder Block"

.

JPBIA2059ZZ

Standard : 

Refer 

to 

EM-118, "Cylinder Block"

.

PBIC3272J

EM-106

< UNIT DISASSEMBLY AND ASSEMBLY >

[HRA2DDT]

CYLINDER BLOCK

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-118, "Cylin-

der 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 

EM-121, "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-121, "Connecting Rod Bearing"

.

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

(a) and (b) at (c) and (d).

• Taper is indicated by the difference in dimension between (c) and

(d) at (a) and (b).

• 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-121, "Connecting Rod Bearing"

 and/or 

EM-121,

"Main Bearing"

.

CRANKSHAFT RUNOUT 

• Place a V-block on a precise flat table to support the journals on the both end of the crankshaft.

A

:  Direction  A

C

: Position C

E

: Position E

f

: 10 mm (0.39 in)

g

: 60 mm (2.36 in)

h

: 120 mm (4.72 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"

.

Limit:

Out-of-round [Difference between (a) and (b)]

Taper [Difference between (c) and (d)]

: Refer to 

EM-118, "Cylinder Block"

.

JPBIA0229ZZ