Nissan Murano Z51 (2008 year). Manual - part 178

 

  Index      Manuals     Nissan Murano Z51 (2008 year) - Service and Repair Manual

 

Search            copyright infringement  

 

 

 

 

 

 

 

 

Content      ..     176      177      178      179     ..

 

 

Nissan Murano Z51 (2008 year). Manual - part 178

 

 

CYLINDER HEAD

EM-113

< DISASSEMBLY AND ASSEMBLY >

C

D

E

F

G

H

I

J

K

L

M

A

EM

N

P

O

a.

Apply new engine oil on valve oil seal joint and seal lip.

b.

Install with the valve oil seal drift [SST: KV10115600 (J-38958)]
(A) press fit valve seal to height (b) shown in the figure.
NOTE:
Dimension: Height measured before valve spring seat installa-
tion.

4.

Install valve spring seat.

5.

Install valve.
• Install it in the original position.

NOTE:
Larger diameter valves are for intake side.

6.

Install valve spring (uneven pitch type).
• Install narrow pitch end (paint mark) to cylinder head side

(valve spring seat side).

7.

Install valve spring retainer.

8.

Install valve collet.
• Compress valve spring with the valve spring compressor [SST:

KV10116200 (J-26336-A)] (A), the attachment [SST:
KV10115900 (J-26336-20)] (C) and the adapter [SST:
KV10109220 ( — )] (B). Install valve collet with a magnet
hand.

CAUTION:

When working, take care not to damage valve lifter holes.

• Tap valve stem edge lightly with plastic hammer after installa-

tion to check its installed condition.

9.

Install valve lifter.
• Install it in the original position.

10. Install spark plug tube.

• Press-fit spark plug tube as follows:

a.

Remove old liquid gasket adhering to cylinder head mounting hole.

b.

Apply sealant to area within approximately 12 mm (0.47 in) from edge of spark plug tube press-fit side.
Use genuine high strength thread locking sealant or equivalent. Refer to 

GI-17, "Recommended

Chemical Products and Sealants"

.

Intake and exhaust

: 14.3 - 14.9 mm (0.563 - 0.587 in)

JPBIA0178ZZ

A

: Wide pitch

B

: Narrow pitch

C

: Paint mark

: Cylinder head side

Paint mark color: Blue

JPBIA0179ZZ

JPBIA0180ZZ

Revision: 2008 October

2009 Murano

EM-114

< DISASSEMBLY AND ASSEMBLY >

CYLINDER HEAD

c.

Using a drift, press-fit spark plug tube so that its height (A) is as
specified in the figure.

CAUTION:

• When press-fitting, take care not to deform spark plug

tube.

• After press-fitting, wipe off liquid gasket protruding onto

cylinder-head upper face.

11. Install spark plug with the spark plug wrench (commercial service tool).

Inspection

INFOID:0000000003304160

INSPECTION AFTER REMOVAL

Cylinder Head Bolts Outer Diameter

• Cylinder head bolts are tightened by plastic zone tightening

method. Whenever the size difference between (C) and (B)
exceeds the limit, replace them with new one. 

• If reduction of outer diameter appears in a position other than (B),

use it as (B) point.

Cylinder Head Distortion

NOTE:
When performing this inspection, cylinder block distortion should be also checking. Refer to 

EM-126, "Inspec-

tion"

.

1.

Using a scraper, wipe off oil, scale, gasket, sealant and carbon deposits from surface of cylinder head.

CAUTION:

Never allow gasket fragments to enter engine oil or engine coolant passages.

2.

At each of several locations on bottom surface of cylinder head,
measure the distortion in six directions (A), (B), (C), (D), (E), and
(F).

• If it exceeds the limit, replace cylinder head.

INSPECTION AFTER DISASSEMBLY

Valve Dimensions

• Check the dimensions of each valve. For the dimensions, refer to 

EM-144, "Cylinder Head"

.

• If dimensions are out of the standard, replace valve and check valve seat contact. Refer to “Valve Seat Con-

tact”.

Valve Guide Clearance

Valve Stem Diameter

B

: Genuine high strength thread locking sealant application area

Standard press-fit height: 37.7 - 38.7 mm (1.484 - 1.524 in)

JPBIA0181ZZ

A

: Measuring point

d

: 11 mm (0.43 in)

e

: 48 mm (1.89 in)

Limit [(C) - (B)]

: 0.11 mm (0.0043 in)

JPBIA0173ZZ

Limit

: Refer to 

EM-144, "Cylinder Head"

.

JPBIA0176ZZ

Revision: 2008 October

2009 Murano

CYLINDER HEAD

EM-115

< DISASSEMBLY AND ASSEMBLY >

C

D

E

F

G

H

I

J

K

L

M

A

EM

N

P

O

• Measure the diameter of valve stem with micrometer (A).

Valve Guide Inner Diameter

• Measure the inner diameter of valve guide with bore gauge.

Valve Guide Clearance

• (Valve guide clearance) = (Valve guide inner diameter) – (Valve stem diameter)

• If the calculated value exceeds the limit, replace valve and/or valve guide. When valve guide must be

replaced, refer to 

EM-110, "Disassembly and Assembly"

.

Valve Seat Contact

• After confirming that the dimensions of valve guides and valves are within the specifications, perform this

procedure.

• Apply prussian blue (or white lead) onto contacting surface of valve seat to check the condition of the valve

contact on the surface.

• Check if the contact area band is continuous all around the circumference.
• If not, grind to adjust valve fitting and check again. If the contacting

surface still has “NG” conditions (B) even after the recheck,
replace valve seat. Refer to 

EM-110, "Disassembly and Assem-

bly"

.

Valve Spring Squareness

• Set a try square (A) along the side of valve spring and rotate

spring. Measure the maximum clearance between the top of spring
and try square.

• If it exceeds the limit, replace valve spring.

Valve Spring Dimensions and Valve Spring Pressure Load

Standard 

: Refer to 

EM-144, 

"Cylinder Head"

.

(Intake and exhaust)

Standard

: Refer to 

EM-144, 

"Cylinder Head"

.

(Intake and exhaust)

Valve guide clearance

: Refer to 

EM-144, "Cylinder Head"

.

Standard and limit (Intake and exhaust)

JPBIA0183ZZ

A

:  OK

JPBIA0187ZZ

B

:  Contact

Limit

: Refer to 

EM-144, "Cylinder Head"

.

JPBIA0189ZZ

Revision: 2008 October

2009 Murano

EM-116

< DISASSEMBLY AND ASSEMBLY >

CYLINDER HEAD

• Check the valve spring pressure at specified spring height.

• If the installation load or load with valve open is out of the stan-

dard, replace valve spring.

INSPECTION AFTER INSTALLATION

Inspection for Leakage

The following are procedures for checking fluids leakage, lubricates leakage, and exhaust gases leakage.

• Before starting engine, check oil/fluid levels including engine coolant and engine oil. If less than required

quantity, fill to the specified level. Refer to 

MA-15, "FOR NORTH AMERICA : Fluids and Lubricants"

 (for

North America) or 

MA-16, "FOR MEXICO : Fluids and Lubricants"

 (for Mexico).

• Use procedure below to check for fuel leakage.
- Turn ignition switch “ON” (with engine stopped). With fuel pressure applied to fuel piping, check for fuel leak-

age at connection points.

- Start engine. With engine speed increased, check again for fuel leakage at connection points.
• Run engine to check for unusual noise and vibration.
• Warm up engine thoroughly to check there is no leakage of fuel, exhaust gases, or any oil/fluids including

engine oil and engine coolant.

• Bleed air from lines and hoses of applicable lines, such as in cooling system.
• After cooling down engine, again check oil/fluid levels including engine oil and engine coolant. Refill to the

specified level, if necessary.

Summary of the inspection items:

*: Transmission/transaxle/CVT fluid, power steering fluid, brake fluid, etc.

Standard (Intake and exhaust)

: Refer to 

EM-144, 

"Cylinder Head"

.

Free height

Installation height

Installation load

Height during valve open

Load with valve open

SEM113

Items

Before starting engine

Engine running

After engine stopped

Engine coolant

Level

Leakage

Level

Engine oil

Level

Leakage

Level

Other oils and fluid*

Level

Leakage

Level

Fuel

Leakage

Leakage

Leakage

Exhaust gases

Leakage

Revision: 2008 October

2009 Murano

CYLINDER BLOCK

EM-117

< DISASSEMBLY AND ASSEMBLY >

C

D

E

F

G

H

I

J

K

L

M

A

EM

N

P

O

CYLINDER BLOCK

Exploded View

INFOID:0000000003304161

1.

Reinforcement plate

2.

Drive plate

3.

Rear oil seal retainer

4.

Sub harness

5.

Knock sensor 

6.

Cylinder block

7.

Thrust bearing (upper)

8.

Main bearing (upper)

9.

Crankshaft

JPBIA1673GB

Revision: 2008 October

2009 Murano

EM-118

< DISASSEMBLY AND ASSEMBLY >

CYLINDER BLOCK

Disassembly and Assembly

INFOID:0000000003304231

DISASSEMBLY

1.

Remove the following parts:
• Intake manifold collector: Refer to 

EM-29, "Exploded View"

.

• Intake manifold: Refer to 

EM-32, "Exploded View"

.

• Oil pans (lower and upper): Refer to 

EM-39, "Exploded View"

.

• Front and rear timing chain case: Refer to 

EM-89, "Exploded View"

.

• Cylinder head: Refer to 

EM-106, "Exploded View"

.

2.

Remove knock sensor.

CAUTION:

Carefully handle sensor avoiding shocks.

3.

Remove rear oil seal retainer.
• Remove by inserting screwdriver between main bearing cap and rear oil seal retainer.

CAUTION:

If rear oil seal retainer is removed, replace it with new one.
NOTE:
Regard both rear oil seal and retainer as an assembly.

4.

Remove baffle plate from main bearing beam.

5.

Remove piston and connecting rod assembly with the following procedure:
• Before removing piston and connecting rod assembly, check the connecting rod side clearance. Refer to

EM-126, "Inspection"

.

CAUTION:

Be careful not to drop connecting rod bearing, and to scratch the surface.

a.

Position crankshaft pin corresponding to connecting rod to be removed onto the bottom dead center.

b.

Remove connecting rod bearing cap.

c.

Using a hammer handle or similar tool, push piston and connect-
ing rod assembly out to the cylinder head side.

CAUTION:

Be careful not to damage the cylinder wall and crankshaft
pin, resulting from an interference of the connecting rod big
end.

6.

Remove connecting rod bearings from connecting rod and connecting rod bearing cap.

CAUTION:

• Be careful not to drop connecting rod bearing, and to scratch the surface.
• Identify installation positions, and store them without mixing them up.

7.

Remove piston rings form piston. 
• Before removing piston rings, check the piston ring side clearance. Refer to 

EM-126, "Inspection"

.

10. Crankshaft key

11. Thrust bearing (lower)

12. Main bearing (lower)

13. Main bearing cap

14. Main bearing cap bolt

15. Main bearing beam

16. Baffle plate

17. Connecting rod bolt

18. Connecting rod bearing cap

19. Connecting rod bearing

20. Connecting rod

21. Snap ring

22. Piston pin

23. Piston

24. Oil ring

25. Second ring

26. Top ring

27. Pilot converter

28. Oil jet

29. Gasket (for Canada)

30. Cylinder block heater (for Canada)

A.

Crankshaft side

B.

Chamfered

C.

Refer to 

EM-118

D.

Front mark

Refer to 

GI-4, "Components"

 for symbols in the figure.

EMQ0191D

Revision: 2008 October

2009 Murano

CYLINDER BLOCK

EM-119

< DISASSEMBLY AND ASSEMBLY >

C

D

E

F

G

H

I

J

K

L

M

A

EM

N

P

O

• Use a piston ring expander (commercial service tool) (A).

CAUTION:

• When removing piston rings, be careful not to damage

piston.

• Be careful not to damage piston rings by expanding them

excessively.

8.

Remove piston from connecting rod as follows: 

a.

Using a snap ring pliers (A), remove snap rings.

b.

Heat piston to 60 to 70

°

C (140 to 158

°

F) with an industrial use

drier (A) or equivalent.

c.

Push out piston pin with stick of outer diameter approximately 20
mm (0.79 in).

9.

Remove main bearing cap bolts.
NOTE:
• Before loosening main bearing cap bolts, measure the crankshaft end play. Refer to 

EM-126, "Inspec-

tion"

.

JPBIA0194ZZ

JPBIA0195ZZ

JPBIA0196ZZ

PBIC0262E

Revision: 2008 October

2009 Murano

EM-120

< DISASSEMBLY AND ASSEMBLY >

CYLINDER BLOCK

• Loosen main bearing cap bolts in the reverse order shown in

the figure in several different steps.

10. Remove main bearing beam.

11. Remove main bearing caps.

CAUTION:

Be careful not to drop main bearing, and to scratch the sur-
face.
• Using main bearing cap bolts, remove main bearing cap while

shaking it back-and-forth.

12. Remove crankshaft.
13. Remove main bearings and thrust bearings from cylinder block and main bearing caps.

CAUTION:

• Be careful not to drop main bearing, and to scratch the surface.
• Identify installation positions, and store them without mixing them up.

14. Remove oil jet.

ASSEMBLY

1.

Fully air-blow engine coolant and engine oil passages in cylinder block, cylinder bore and crankcase to
remove any foreign material.

CAUTION:

Use a goggles to protect your eye.

: Engine front

JPBIA0439ZZ

PBIC0881E

EMQ0195D

Revision: 2008 October

2009 Murano

CYLINDER BLOCK

EM-121

< DISASSEMBLY AND ASSEMBLY >

C

D

E

F

G

H

I

J

K

L

M

A

EM

N

P

O

2.

Install each plug to cylinder block as shown in the figure.

• Apply sealant to the thread of water drain plug (A).

Use Anaerobic Liquid Gasket or equivalent. Refer to 

GI-

17, "Recommended Chemical Products and Sealants"

.

NOTE:
For Canada, water drain plug (A) in the figure is not water
drain plug but block heater. Refer to 

EM-117, "Exploded View"

.

• Apply sealant to the thread of connector bolt (D).

Use Genuine RTV Silicone Sealant or equivalent. Refer to

GI-17, "Recommended Chemical Products and Sealants"

.

• Apply sealant to the thread of plug (C).

Use genuine high strength thread locking sealant or
equivalent. Refer to 

GI-17, "Recommended Chemical

Products and Sealants"

.

• Replace washers with new one.

• Tighten each plug and connector bolt as specified below.

3.

Install oil jet.
• Insert oil jet dowel pin (A) into cylinder block dowel pin hole,

and tighten mounting bolts.

4.

Install main bearings and thrust bearings as follows:

CAUTION:

Be careful not to drop main bearing, and to scratch the surface.

a.

Remove dust, dirt, and engine oil on bearing mating surfaces of cylinder block and main bearing caps.

B

: Water drain plug

PBIC2487E

Part

Washer

Tightening torque

A

Yes

62.0 N·m (6.3 kg-m, 46 ft-lb)

B

No

9.8 N·m (1.0 kg-m, 87 in-lb)

C

Yes

62.0 N·m (6.3 kg-m, 46 ft-lb)

D

No

39.2 N·m (4.0 kg-m, 29 ft-lb)

: Engine front

JPBIA0198ZZ

Revision: 2008 October

2009 Murano

EM-122

< DISASSEMBLY AND ASSEMBLY >

CYLINDER BLOCK

b.

Install thrust bearings (1) to the both sides of the No. 3 journal
housing on cylinder block and main bearing cap.

• Install thrust bearings with the oil groove (E) facing crankshaft

arm (outside). 

• Install thrust bearing with a projection on one end on cylinder block, and thrust bearing with a projection

at center on main bearing cap. Align each projection with mating notch.

c.

Install main bearings paying attention to the direction.
• Main bearing with oil hole (B) and groove (C) goes on cylinder

block. The one without them goes on main bearing cap.

• Before installing main bearings, apply engine oil to the bearing

surface (inside). Do not apply engine oil to the back surface,
but thoroughly clean it.

• When installing, align main bearing stopper protrusion to cut-

out of cylinder block and main bearing caps.

• Ensure the oil holes on cylinder block and those on the corresponding bearing are aligned.

5.

Install crankshaft to cylinder block.
• While turning crankshaft by hand, check that it turns smoothly. 

6.

Install main bearing caps.
• Main bearing caps are identified by identification mark cast on

them. For installation, face front mark (E) to front side.

NOTE:
Main bearing cap cannot be replaced as a single part, because it
is machined together with cylinder block.

7.

Install main bearing beam.
• Install main bearing beam with front mark facing downward (oil pan side).
• Install main bearing beam with front mark facing front of the

engine.

A

: No. 1

B

: No. 2

C

: No. 3

D

: No. 4

F

: Thrust bearing installation position

: Engine front

JPBIA0199ZZ

A

: Cylinder block side

D

: Main bearing cap side

: Engine front

JPBIA0200ZZ

A

: No. 1

B

: No. 2

C

: No. 3

D

: No. 4

: Engine front

JPBIA0440ZZ

PBIC0881E

Revision: 2008 October

2009 Murano

CYLINDER BLOCK

EM-123

< DISASSEMBLY AND ASSEMBLY >

C

D

E

F

G

H

I

J

K

L

M

A

EM

N

P

O

8.

Install main bearing cap bolts in numerical order as shown in the
figure as follows:

a.

Inspect the outer diameter of main bearing cap bolt. Refer to

EM-126, "Inspection"

.

b.

Apply new engine oil to threads and seat surfaces of main bear-
ing cap bolts.

c.

Tighten main bearing cap bolts in several different steps.

d.

Turn all main bearing cap bolts 90 degrees clockwise (angle tightening).

CAUTION:

Use the angle wrench [SST: KV10112100 (BT8653-A)] to
check tightening angle. Never make judgment by visual
inspection. 
• After installing main bearing cap bolts, check that crankshaft

can be rotated smoothly by hand.

• Check the crankshaft end play. Refer to 

EM-126, "Inspection"

.

9.

Install piston to connecting rod as follows:

a.

Using snap ring pliers, install new snap ring to the groove of piston rear side. 
• Insert it fully into groove to install.

b.

Install piston to connecting rod.
• Using an industrial drier or similar tool, heat piston until piston pin can be pushed in by hand without

excess force [approximately 60 to 70

°

C (140 to 158

°

F)]. From the front to the rear, insert piston pin into

piston and connecting rod.

• Assemble so that the front mark on the piston crown and the

cylinder number on connecting rod are positioned as shown in
the figure.

c.

Install new snap ring to the groove of the piston front side. 
• Insert it fully into groove to install.
• After installing, check that connecting rod moves smoothly.

10. Using a piston ring expander (commercial service tool) (A),

install piston rings.

CAUTION:

• When installing piston rings, be careful not to damage

piston.

• Be careful not to damage piston rings by expending them

excessively.

: Engine front

: 35.3 N·m (3.6 kg-m, 26 ft-lb)

JPBIA0439ZZ

PBIC0921E

SEM838F

JPBIA0194ZZ

Revision: 2008 October

2009 Murano

EM-124

< DISASSEMBLY AND ASSEMBLY >

CYLINDER BLOCK

• If there is stamped mark on ring, mount it with marked side up.

NOTE:
If there is no stamp on ring, no specific orientation is required
for installation.

• Position each ring with the gap as shown in the figure referring

to the piston front mark (D).

• Check the piston rings side clearance. Refer to 

EM-126, "Inspection"

.

11. Install connecting rod bearings to connecting rod and connecting rod bearing cap.

CAUTION:

Be careful not to drop connecting rod bearing, and to scratch the surface.
• Before installing connecting rod bearings, apply engine oil to the bearing surface (inside). Do not apply

engine oil to the back surface, but thoroughly clean it. 

• When installing, align connecting rod bearing stopper protru-

sion (B) with cutout (C) of connecting rod and connecting rod
bearing cap to install. 

• Ensure the oil hole (A) on connecting rod and that on the cor-

responding bearing are aligned. 

12. Install piston and connecting rod assembly to crankshaft. 

• Position crankshaft pin corresponding to connecting rod to be installed onto the bottom dead center. 
• Apply engine oil sufficiently to the cylinder bore, piston and crankshaft pin journal.
• Match the cylinder position with the cylinder number on connecting rod to install. 
• Be sure that front mark on piston crown is facing front of engine.
• Using a piston ring compressor [SST: EM03470000 (J-8037)]

(A) or suitable tool, install piston with the front mark on the pis-
ton crown facing the front of the engine.

CAUTION:

Be careful not to damage the cylinder wall and crankshaft
pin, resulting from an interference of the connecting rod big
end.

Stamped mark:

Top ring (A)

: —

Second ring (B)

: 2 R

JPBIA0263ZZ

C

: Top ring gap

E

: Oil ring upper or lower rail gap (either of then)

F

: Second ring and oil ring spacer gap

a

: 90 degrees

b

: 45 degrees

JPBIA0205ZZ

JPBIA0206ZZ

JPBIA0207ZZ

Revision: 2008 October

2009 Murano

CYLINDER BLOCK

EM-125

< DISASSEMBLY AND ASSEMBLY >

C

D

E

F

G

H

I

J

K

L

M

A

EM

N

P

O

13. Install connecting rod bearing cap.

• Match the stamped cylinder number marks on connecting rod

with those on connecting rod bearing cap to install.

• Be sure that front mark (H) on connecting rod bearing cap is facing front of the engine.

14. Tighten connecting rod bolt as follows:
a.

Inspect the outer diameter of connecting rod bolt. Refer to 

EM-126, "Inspection"

.

b.

Apply engine oil to the threads and seats of connecting rod bolts. 

c.

Tighten connecting rod bolts.

d.

Then tighten all connecting rod bolts 90 degrees clockwise (angle tightening).

CAUTION:

Always use the angle wrench [SST: KV10112100 (BT8653-
A)]. Avoid tightening based on visual check alone.
• After tightening connecting rod bolts, check that crankshaft

rotates smoothly.

• Check the connecting rod side clearance. Refer to 

EM-126,

"Inspection"

.

15. Install baffle plate to main bearing beam.

16. Install new rear oil seal retainer to cylinder block. Refer to 

EM-104, "REAR OIL SEAL : Removal and

Installation"

.

17. Install pilot converter.

• With drift [outer diameter: approximately 33 mm (1.30 in)],

press-fit as far as it will go.

A

:  Sample  codes

B

: Bearing stopper groove

C

: Small-end diameter grade

D

: Standard stamp

E

: Weight grade

F

: Cylinder No.

G

: Management code

I

: Management code

JPBIA0208ZZ

: 19.6 N·m (2.0 kg-m, 14 ft-lb)

SEM953E

PBIC0899E

Revision: 2008 October

2009 Murano

EM-126

< DISASSEMBLY AND ASSEMBLY >

CYLINDER BLOCK

• Press-fit pilot converter with its chamfer facing crankshaft as

shown in the figure.

18. Install knock sensors.

• Install knock sensor so that connector faces the rear of the

engine.

• After installing knock sensor, connect harness connector, and

lay it out to rear of engine.

CAUTION:

• Never tighten mounting bolts while holding connector.   
• If any impact by dropping is applied to knock sensor,

replace it with new one.

NOTE:
• Check that there is no foreign material on the cylinder block

mating surface and the back surface of knock sensor. 

• Check that knock sensor does not interfere with other parts.

19. Note the following, assemble in the reverse order of disassembly after this step.

Drive plate

• When installing drive plate to crankshaft, be sure to correctly align crankshaft side dowel pin and drive

plate side dowel pin hole.

- If these are not aligned correctly, engine runs roughly and “MIL” turns on.
• Install drive plate (2) and reinforcement plate (3) as shown in

the figure.

• Holding ring gear with the pulley holder (commercial service

tool).

• Tighten mounting bolts crosswise over several times.

Inspection

INFOID:0000000003304163

CRANKSHAFT END PLAY

: Crankshaft side

JPBIA0210ZZ

A

:  Bank  1

B

:  Bank  2

: Engine front

JPBIA0211ZZ

1

: Ring gear

4

: Pilot converter

5

: Crankshaft

A

: Rounded

: Engine front

JPBIA0212ZZ

Revision: 2008 October

2009 Murano

CYLINDER BLOCK

EM-127

< DISASSEMBLY AND ASSEMBLY >

C

D

E

F

G

H

I

J

K

L

M

A

EM

N

P

O

• Measure the clearance between thrust bearings and crankshaft

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

• If the measured value exceeds the limit, replace thrust bearings,

and measure again. If it still exceeds the limit, replace crankshaft
also.

CONNECTING ROD SIDE CLEARANCE

• Measure the side clearance between connecting rod and crank-

shaft arm with a feeler gauge (A).

• If the measured value exceeds the limit, replace connecting rod,

and measure again. If it still exceeds the limit, replace crankshaft
also.

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)

• If the calculated value is out of the standard, replace piston and piston pin assembly.
• When replacing piston and piston pin assembly, refer to 

EM-136, "Description"

.

NOTE:
• Piston is available together with piston pin as assembly.

Standard and limit

: Refer to 

EM-146, "Cylinder Block"

.

EMQ0196D

Standard and limit

: Refer to 

EM-146, "Cylinder Block"

.

JPBIA0536ZZ

Standard

: Refer to 

EM-146, "Cylinder Block"

.

JPBIA0217ZZ

Standard

: Refer to 

EM-146, "Cylinder Block"

.

JPBIA0218ZZ

Standard

: Refer to 

EM-146, "Cylinder Block"

.

Revision: 2008 October

2009 Murano

EM-128

< DISASSEMBLY AND ASSEMBLY >

CYLINDER BLOCK

• Piston pin (piston pin hole) grade is provided only for the parts installed at the plant. For service parts, no

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

PISTON RING SIDE CLEARANCE

• Measure the side clearance of piston ring (1) and piston ring

groove 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 piston also.

PISTON RING END GAP

• Check that the cylinder bore inner diameter is within the specification. Refer to 

EM-146, "Cylinder Block"

.

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

then insert piston ring until middle of cylinder with piston, and mea-
sure the piston ring end gap with a feeler gauge (B).

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

measure again. If it still exceeds the limit, rebore cylinder and use
oversize piston and piston rings.

CONNECTING ROD BEND AND TORSION

• Check with a connecting rod aligner.

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

CONNECTING ROD BIG END DIAMETER

• Install connecting rod bearing cap without installing connecting rod bearing, and tightening connecting rod

bolts to the specified torque. Refer to 

EM-118, "Disassembly and Assembly"

 for the tightening procedure.

A

:  NG

B

:  OK

Standard and limit

: Refer to 

EM-146, "Cylinder Block"

.

JPBIA0219ZZ

A

: Press-fit

C

: Measuring point

Standard and limit

: Refer to 

EM-146, "Cylinder Block"

.

JPBIA0220ZZ

A

:  Bend

B

:  Torsion

C

: Feeler gauge

Bend limit

: Refer to 

EM-146, "Cylinder Block"

.

Torsion limit

JPBIA0221ZZ

Revision: 2008 October

2009 Murano

 

 

 

 

 

 

 

Content      ..     176      177      178      179     ..