Nissan X-Trail 32. Manual - part 1055

 

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Nissan X-Trail 32. Manual - part 1055

 

 

CYLINDER BLOCK

EM-117

< UNIT DISASSEMBLY AND ASSEMBLY >

[MR20DD]

C

D

E

F

G

H

I

J

K

L

M

A

EM

N

P

O

• Check with a connecting rod aligner.

• If it exceeds the limit, replace connecting rod assembly.

CONNECTING ROD BIG END DIAMETER

• Install connecting rod cap 

 without connecting rod bearing

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

EM-107, "Disassembly and Assembly"

.

• 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

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

Piston Pin Outer Diameter

: Bend

: Torsion

C

: Feeler gauge

Limit

: Refer to 

EM-137, "Cylinder Block"

.

JSBIA2514ZZ

: Connecting rod

: Example

: Measuring direction of inner diameter

Standard : 

Refer 

to 

EM-137, "Cylinder Block"

.

PBIC3269J

Standard : 

Refer 

to 

EM-137, "Cylinder Block"

.

JPBIA0223ZZ

EM-118

< UNIT DISASSEMBLY AND ASSEMBLY >

[MR20DD]

CYLINDER BLOCK

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-124, "Piston"

.

• If replacing connecting rod assembly. Refer to 

EM-125, "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-107, "Disassembly and Assembly"

.

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

Standard : 

Refer 

to 

EM-137, "Cylinder Block"

.

JSBIA2511ZZ

Standard and Limit 

: Refer to 

EM-137, "Cylinder Block"

.

Limit : 

Refer 

to 

EM-137, "Cylinder Block"

.

JSBIA2526ZZ

: Cylinder block

: Main bearing cap

: Engine front

Standard : 

Refer 

to 

EM-137, "Cylinder Block"

.

PBIC4005E

CYLINDER BLOCK

EM-119

< UNIT DISASSEMBLY AND ASSEMBLY >

[MR20DD]

C

D

E

F

G

H

I

J

K

L

M

A

EM

N

P

O

Cylinder Bore Inner Diameter

• Using a cylinder gauge, measure the cylinder bore for wear, out-of-

round and taper at six different points on each cylinder. [

 and 

directions at 

, and 

] [

 is in longitudinal direction of engine]

NOTE:
When determining cylinder bore grade, measure the cylinder bore

 direction at 

 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

Calculate by piston skirt diameter and cylinder bore inner diameter
[direction , 

position ].

(Clearance) = (Cylinder bore inner diameter) – (Piston skirt diame-
ter)

: 10 mm (0.39 in)

: 60 mm (2.36 in)

: 130 mm (5.12 in)

Standard:

Cylinder bore inner diameter 

: Refer to 

EM-137, "Cylinder Block"

.

Limit:

Out-of-round [Difference between 

 and 

]

Taper [Difference between 

 and 

]

: Refer to 

EM-137, "Cylinder Block"

.

JPBIA2059ZZ

Standard : 

Refer 

to 

EM-137, "Cylinder Block"

.

JPBIA0227ZZ

: Direction A

: Position C

: Position E

: 10 mm (0.39 in)

: 60 mm (2.36 in)

: 130 mm (5.12 in)

Standard and Limit 

: Refer to 

EM-137, "Cylinder Block"

.

JPBIA2059ZZ

EM-120

< UNIT DISASSEMBLY AND ASSEMBLY >

[MR20DD]

CYLINDER BLOCK

• If it exceeds the limit, replace piston and piston pin assembly and/or cylinder block. Refer to 

EM-124, "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-141, "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-125, "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

 and 

 at 

 and 

.

• Taper is indicated by the difference in dimension between 

 and

 at 

 and 

.

• 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-125, "Connecting Rod Bearing"

 and/or 

EM-127,

"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

Standard : 

Refer 

to 

EM-137, "Cylinder Block"

.

JPBIA6344ZZ

Standard : 

Refer 

to 

EM-137, "Cylinder Block"

.

Limit:

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

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

: Refer to 

EM-137, "Cylinder Block"

.

JPBIA0229ZZ

Standard and Limit

: Refer to 

EM-137, "Cylinder 

Block"

.

JPBIA6345ZZ

 

 

 

 

 

 

 

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