Nissan X-Trail 32. Manual - part 1126

CYLINDER BLOCK

EM-401

< UNIT DISASSEMBLY AND ASSEMBLY >

[R9M]

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c.

Tighten mounting bolts in two steps separately in numerical
order as shown in the figure.

i.

Tighten mounting bolts No.1 and 5.

ii.

Tighten mounting bolts No. 1 to 8 in numerical order as shown.

24. Assemble in the reverse order of disassembly.

Inspection

INFOID:0000000010784366

CRANKSHAFT END PLAY

• Measure the clearance between thrust bearings and crankshaft

arm when crankshaft is moved fully forward or backward with a dial
indicator (A).

• If it exceeds the standard, replace thrust bearings, and measure

again. If it still exceeds the standard, also replace crankshaft.

CRANKSHAFT PIN JOURNAL DIAMETER 

• Measure the outer diameter of crankshaft pin journal with a

micrometer (A).

• If it exceeds the standard, measure the connecting rod bearing oil

clearance. Refer to “CONNECTING ROD BEARING OIL CLEAR-
ANCE”.

CRANKSHAFT MAIN JOURNAL DIAMETER

• Measure the outer diameter of crankshaft main journals with a micrometer.

• If it exceeds the standard, measure the main bearing oil clearance. Refer to “MAIN BEARING OIL CLEAR-

ANCE”.

CONNECTING ROD SIDE CLEARANCE

: 5.0 N·m (0.51 kg-m, 44 in-lb)

: 12.0 N·m (1.2 kg-m, 9 ft-lb)

JPBIA0645ZZ

Standard

: Refer to 

EM-417, "Cylinder Block"

.

JPBIA0845ZZ

Standard : 

Refer 

to 

EM-417, "Cylinder Block"

.

JPBIA0228ZZ

Standard : 

Refer 

to 

EM-417, "Cylinder Block"

.

EM-402

< UNIT DISASSEMBLY AND ASSEMBLY >

[R9M]

CYLINDER BLOCK

• Measure the side clearance between connecting rod and crank-

shaft arm with a feeler gauge (A).

• If it exceeds the standard, replace connecting rod, and measure

again. If it still exceeds the standard, also replace crankshaft.

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-390, "Disassembly and Assembly"

.

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

inside micrometer.

• If it exceeds 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

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 it exceeds the standard, replace connecting rod assembly and/or piston and piston pin assembly.
• If replacing piston and piston pin assembly. Refer to “PISTON PROTRUSION”.

Standard

: Refer to 

EM-417, "Cylinder Block"

.

JPBIA0847ZZ

: Connecting rod

Standard : 

Refer 

to 

EM-417, "Cylinder Block"

.

JPBIA0222ZZ

Standard : 

Refer 

to 

EM-417, "Cylinder Block"

.

JPBIA0223ZZ

Standard : 

Refer 

to 

EM-417, "Cylinder Block"

.

JPBIA0218ZZ

Standard

: Refer to 

EM-417, "Cylinder Block"

.

CYLINDER BLOCK

EM-403

< UNIT DISASSEMBLY AND ASSEMBLY >

[R9M]

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PISTON PROTRUSION

Measure the protrusion of piston with the following procedure:
1.

Set piston at a point close to the TDC. 

2.

Set the dial indicator stand set [commercial service tool:
KV113B0040 (Mot.251-01)] (B) and [commercial service tool:
KV113B0050 (Mot.252-01)] (A) at the location as shown in the
figure. 

3.

Set the indicator scale to “0” where the piston protrusion is max-
imized.

4.

Move the dial indicator stand so that the tip of dial indicator can
contact the cylinder block. Read the difference.

5.

If measured value is out of the standard, replace piston. Select a
piston in “Piston Protrusion Grade”.

PISTON TO PISTON PIN OIL CLEARANCE

Piston Pin Hole Diameter 

Measure the inner diameter of piston pin hole with an inside
micrometer (A).

Piston Pin Outer Diameter 

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

Piston to Piston Pin Oil Clearance

(Piston to piston pin oil clearance) = (Piston pin hole diameter) – (Piston pin outer diameter)

Standard

: Refer to 

EM-417, "Cylinder Block"

.

JPBIA1803ZZ

: Date of manufacture

: Piston grade

: Modification in production suffix

: Mark engraved

: Engine front

Piston Protrusion Grade:

Refer to 

EM-417, "Cylinder Block"

.

JPBIA0589ZZ

Standard

: Refer to 

EM-417, "Cylinder Block"

.

JPBIA0217ZZ

Standard : 

Refer 

to 

EM-417, "Cylinder Block"

.

JPBIA0218ZZ

EM-404

< UNIT DISASSEMBLY AND ASSEMBLY >

[R9M]

CYLINDER BLOCK

• If it exceeds the standard, replace piston and piston pin an assembly. 
NOTE:
Piston is available together with piston pin as assembly.

PISTON RING SIDE CLEARANCE

• Measure the side clearance of piston ring 

 and piston ring groove

with a feeler gauge (C).

• If it exceeds the standard, replace piston ring, and measure again.

If it still exceeds the standard, also replace piston.

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 

 and piston ring 

, and

then insert 

 piston ring until middle of cylinder with piston, and

measure piston ring end gap with a feeler gauge (B).

• If it exceeds the standard, replace piston ring, and measure again.

If it still exceeds the standard, replace cylinder block and piston
rings.

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 different

points in six directions (

, 

, 

, 

, 

 and 

) with a straight

edge (A) and feeler gauge (B).

• If it exceeds the standard, 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-390, "Disassembly and Assembly"

.

Standard : 

Refer 

to 

EM-417, "Cylinder Block"

.

: OK

: NG

Standard

: Refer to 

EM-417, "Cylinder Block"

.

JPBIA0219ZZ

: Measuring point

Standard

: Refer to 

EM-417, "Cylinder Block"

.

JPBIA0220ZZ

Standard 

: Refer to 

EM-417, "Cylinder Block"

.

JPBIA0224ZZ