Nissan Murano Z50 (2006 year). Manual

CYLINDER BLOCK

EM-117

Revision: 2006 August

2006 Murano

Drain engine coolant by removing water drain plug “A”, “B” and
connector bolt “D” from cylinder block as shown in the figure.

NOTE:
For Canada, “A” in the figure is not water drain plug but block
heater.

Remove drive plate. Fix crankshaft pulley with the pulley holder [SST: KV10109300 (

—

)], and remove

mounting bolts.

●

Loosen mounting bolts in diagonal order.

CAUTION:

●

Do not disassemble drive plate.

●

Never place drive plate with signal plate facing down.

●

When handling signal plate, take care not to damage or
scratch it.

●

Handle signal plate in a manner that prevents it from
becoming magnetized.

Remove the following parts:

●

Intake manifold collectors (upper and lower): Refer to

EM-18, "INTAKE MANIFOLD COLLECTOR"

●

Intake manifold: Refer to

EM-23, "INTAKE MANIFOLD"

●

Oil pans (lower and upper): Refer to

EM-29, "OIL PAN AND OIL STRAINER"

●

Front and rear timing chain case: Refer to

EM-60, "TIMING CHAIN"

●

Cylinder head: Refer to

EM-96, "CYLINDER HEAD"

10. Remove knock sensor.

CAUTION:

Carefully handle sensor avoiding shocks.

PBIC2487E

SEM760G

EM-118

CYLINDER BLOCK

Revision: 2006 August

2006 Murano

11. Remove pilot converter using the pilot bushing puller (SST) as

necessary.

12. 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.

13. Remove baffle plate from main bearing beam.

14. 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-132, "CONNECTING ROD SIDE CLEARANCE"

CAUTION:

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

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

Remove connecting rod bearing cap.

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.

15. 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.

16. Remove piston rings form piston.

●

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

EM-133, "PISTON RING

SIDE CLEARANCE"

●

Use a piston ring expander (commercial service tool).

CAUTION:

●

When removing piston rings, be careful not to damage
piston.

●

Be careful not to damage piston rings by expanding them
excessively.

SEM005G

EMQ0191D

PBIC0087E

CYLINDER BLOCK

EM-119

Revision: 2006 August

2006 Murano

17. Remove piston from connecting rod as follows:

Using a snap ring pliers, remove snap rings.

Heat piston to 60 to 70

C (140 to 158

F) with an industrial use

drier or equivalent.

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

18. Remove main bearing cap bolts.

NOTE:
Use TORX socket (size E14).

●

Before loosening main bearing cap bolts, measure the crankshaft end play. Refer to

EM-132, "CRANK-

SHAFT END PLAY"

●

Loosen main bearing cap bolts in the reverse order shown in
the figure in several different steps.

PBIC1638E

PBIC1639E

PBIC0262E

PBIC1800E

EM-120

CYLINDER BLOCK

Revision: 2006 August

2006 Murano

19. Remove main bearing beam.

20. 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.

21. Remove crankshaft.

22. 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.

23. Remove oil jet.

ASSEMBLY

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.

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-

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

EM-114, "Disassembly and Assembly"

●

Apply sealant to the thread of water drain plug “B” and con-
nector bolt “D”.
Use Genuine RTV Silicone Sealant or equivalent. Refer to

●

Apply sealant to the thread of plug “C”.
Use Genuine High Strength Locking Sealant or equiva-
lent. Refer to

GI-47, "RECOMMENDED CHEMICAL PROD-

UCTS AND SEALANTS"

●

Replace washers with new one.

PBIC0881E

EMQ0195D

PBIC2487E

CYLINDER BLOCK

EM-121

Revision: 2006 August

2006 Murano

●

Tighten each plug and connector bolt as specified below.

Install oil jet.

●

Insert oil jet dowel pin into cylinder block dowel pin hole, and
tighten mounting bolts.

Install main bearings and thrust bearings as follow:

CAUTION:

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

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

Install thrust bearings to the both sides of the No. 3 journal hous-
ing on cylinder block and main bearing cap.

●

Install thrust bearings with the oil groove 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.

Install main bearings paying attention to the direction.

●

Main bearing with oil hole and groove goes on cylinder block.
The one without them goes on main bearing cap.

●

Before installing main bearings, apply engine oil to the bear-
ing surface (inside). Do not apply engine oil to the back sur-
face, 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 corre-
sponding bearing are aligned.

Install crankshaft to cylinder block.

●

While turning crankshaft by hand, check that it turns smoothly.

Install main bearing caps.

Part

Washer

Tightening torque

Yes

62.0 N·m (6.3 kg-m, 46 ft-lb)

9.8 N·m (1.0 kg-m, 87 in-lb)

Yes

62.0 N·m (6.3 kg-m, 46 ft-lb)

39.2 N·m (4.0 kg-m, 29 ft-lb)

PBIC0898E

PBIC0807E

PBIC2489E

EM-122

CYLINDER BLOCK

Revision: 2006 August

2006 Murano

●

Main bearing caps are identified by identification mark cast on
them. For installation, face front mark to front side.

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

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.

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

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

EM-140, "MAIN BEARING CAP BOLT OUTER DIAMETER"

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

Tighten main bearing cap bolts in several different steps.

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

CAUTION:

Use the angle wrench [SST: KV10112100 (BT8653-A)] to
check tightening angle. Do not make judgment by visual
inspection.

●

After installing main bearing cap bolts, make sure that crank-
shaft can be rotated smoothly by hand.

●

Check the crankshaft end play. Refer to

EM-132, "CRANK-

SHAFT END PLAY"

Install piston to connecting rod as follows:

Using snap ring pliers, install new snap ring to the groove of piston rear side.

●

Insert it fully into groove to install.

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 [approx. 60 to 70

C (140 to 158

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

and connecting rod.

SEM456G

PBIC0881E

: 35.3 N·m (3.6 kg-m, 26 ft-lb)

PBIC1800E

PBIC0921E

CYLINDER BLOCK

EM-123

Revision: 2006 August

2006 Murano

●

Assemble so that the front mark on the piston crown and the
cylinder number on connecting rod are positioned as shown in
the figure.

Install new snap ring to the groove of the piston front side.

●

Insert it fully into groove to install.

●

After installing, make sure that connecting rod moves
smoothly.

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

●

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 refer-
ring to the piston front mark.

●

Check the piston rings side clearance. Refer to

EM-133, "PISTON RING SIDE CLEARANCE"

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.

SEM838F

PBIC0087E

Stamped mark:

Top ring

: —

Second ring

: R

SEM757G

PBIC0808E

EM-124

CYLINDER BLOCK

Revision: 2006 August

2006 Murano

●

When installing, align connecting rod bearing stopper protru-
sion with cutout of connecting rod and connecting rod bearing
cap to install.

●

Ensure the oil hole on connecting rod and that on the corre-
sponding 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) or suitable tool, install
piston with the front mark on the piston 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.

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 on connecting rod bearing cap is fac-
ing front of the engine.

14. Tighten connecting rod bolt as follows:

Inspect the outer diameter of connecting rod bolt. Refer to

EM-141, "CONNECTING ROD BOLT OUTER

DIAMETER"

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

Tighten connecting rod bolts.

PBIC2067E

SEM620

PBIC0809E

: 19.6 N·m (2.0 kg-m, 14 ft-lb)

CYLINDER BLOCK

EM-125

Revision: 2006 August

2006 Murano

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, make sure that crank-
shaft rotates smoothly.

●

Check the connecting rod side clearance. Refer to

EM-132,

"CONNECTING ROD SIDE CLEARANCE"

15. Install baffle plate to main bearing beam.

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

●

Apply new engine oil to both oil seal lip and dust seal lip.

●

Apply a continuous bead of liquid gasket with the tube presser
[SST: WS39930000 (

—

)] to rear oil seal retainer as

shown in the figure.
Use Genuine RTV Silicone Sealant or equivalent. Refer to

CAUTION:

●

Replace with a new parts.

●

Attaching should be done within 5 minutes after coating.

●

Make sure the garter spring is in position and seal lips
not inverted.

NOTE:
Regard both rear oil seal and retainer as an assembly.

17. Install pilot converter.

●

With drift [outer diameter: approx. 33 mm (1.30 in)], press-fit
as far as it will go.

●

Press-fit pilot converter with its chamfer facing crankshaft as
shown in the figure.

SEM953E

PBIC2661E

PBIC0899E

SEM537E

EM-126

CYLINDER BLOCK

Revision: 2006 August

2006 Murano

18. Install knock sensor.

●

Install knock sensor so that connector faces front of the
engine.

●

After installing knock sensor, connect harness connector, and
lay it out to rear of engine.

CAUTION:

●

Do not tighten mounting bolts while holding connector.

●

If any impact by dropping is applied to knock sensor,
replace it with new one.

NOTE:

●

Make sure that there is no foreign material on the cylinder
block mating surface and the back surface of knock sensor.

●

Make sure 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 and reinforcement plate as shown in the fig-
ure.

●

Holding ring gear with the pulley holder [SST: KV10109300
(

—

)].

●

Tighten mounting bolts crosswise over several times.

How to Select Piston and Bearing

NBS0029Y

DESCRIPTION

*: For the service parts, the grade for fitting cannot be selected between piston pin and connecting rod. (Only “0” grade is available.) The
information at the shipment from the plant is described as a reference.

●

The identification grade stamped on each part is the grade for the dimension measured in new condition.
This grade cannot apply to reused parts.

●

For reused or repaired parts, measure the dimension accurately. Determine the grade by comparing the
measurement with the values of each selection table.

PBIC0810E

PBIC0910E

Selection points

Selection parts

Selection items

Selection methods

Between cylinder block and
crankshaft

Main bearing

Main bearing grade
(bearing thickness)

Determined by match of cylin-
der block bearing housing
grade (inner diameter of hous-
ing) and crankshaft journal
grade (outer diameter of jour-
nal)

Between crankshaft and con-
necting rod

Connecting rod bearing

Connecting rod bearing grade
(bearing thickness)

Combining service grades for
connecting rod big end diame-
ter and crankshaft pin outer
diameter determine connecting
rod bearing selection.

Between cylinder block and pis-
ton

Piston and piston pin assembly
(Piston is available together
with piston pin as assembly.)

Piston grade
(piston skirt diameter)

Piston grade = cylinder bore
grade (inner diameter of bore)

Between piston and connecting
rod*

—

CYLINDER BLOCK

EM-127

Revision: 2006 August

2006 Murano

●

For details of the measurement method of each part, the reuse standards and the selection method of the
selective fitting parts, refer to the text.

HOW TO SELECT PISTON
When New Cylinder Block is Used

Check the cylinder bore grade (“1”, “2” or “3”) on rear side of cylinder
block, and select piston of the same grade.

NOTE:
Piston is available with piston pin as a set for the service part. (Only
“0” grade piston pin is available.)

When Cylinder Block is Reused

Measure the cylinder bore inner diameter. Refer to

EM-136, "Cylinder Bore Inner Diameter"

Determine the bore grade by comparing the measurement with
the values under the cylinder bore inner diameter of the “Piston
Selection Table”.

Select piston of the same grade.

Piston Selection Table

Unit: mm (in)

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

●

No second grade mark is available on piston.

SEM756G

PBIC0812E

Grade

2 (or no mark)

Cylinder bore inner diameter

95.500 - 95.510

(3.7598 - 3.7602)

95.510 - 95.520

(3.7602 - 3.7606)

95.520 - 95.530

(3.7606 - 3.7610)

Piston skirt diameter

95.480 - 95.490

(3.7590 - 3.7594)

95.490 - 95.500

(3.7594 - 3.7598)

95.500 - 95.510

(3.7598 - 3.7602)

EM-128

CYLINDER BLOCK

Revision: 2006 August

2006 Murano

HOW TO SELECT CONNECTING ROD BEARING
When New Connecting Rod and Crankshaft are Used

Check pin diameter grade (“0”, “1” or “2”) on front of crankshaft, and
select connecting rod bearing of the same grade.

NOTE:
There is no grading for connecting rod big end diameter.

When Crankshaft and Connecting Rod are Reused

Measure the connecting rod big end diameter. Refer to

EM-134, "CONNECTING ROD BIG END DIAME-

TER"

Make sure that the connecting rod big end diameter is within the standard value.

Measure the crankshaft pin journal diameter. Refer to

EM-138, "CRANKSHAFT PIN JOURNAL DIAME-

TER"

Determine the grade of crankshaft pin diameter grade by corresponding to the measured dimension in
“Crankshaft pin journal diameter” column of “Connecting Rod Bearing Selection Table”.

Select connecting rod bearing of the same grade.

Connecting Rod Bearing Selection Table

Unit: mm (in)

Undersize Bearings Usage Guide

●

When the specified connecting rod bearing oil clearance is not obtained with standard size connecting rod
bearings, use undersize (US) bearings.

●

When using undersize (US) bearing, measure the connecting rod bearing inner diameter with bearing
installed, and grind crankshaft pin so that the connecting rod bearing oil clearance satisfies the standard.

CAUTION:

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

SEM452G

Connecting rod big end diameter

55.000 - 55.013 (2.1654 - 2.1659)

Crankshaft

Connecting rod bearing

Crankshaft pin journal diameter

Grade (Mark)

Dimension (Bearing thickness range)

Bearing grade No.

Color

51.968 - 51.974 (2.0460 - 2.0462)

1.500 - 1.503 (0.0591 - 0.0592)

STD 0

Black

51.962 - 51.968 (2.0457 - 2.0460)

1.503 - 1.506 (0.0592 - 0.0593)

STD 1

Brown

51.956 - 51.962 (2.0455 - 2.0457)

1.506 - 1.509 (0.0593 - 0.0594)

STD 2

Green

PBIC1908E

CYLINDER BLOCK

EM-129

Revision: 2006 August

2006 Murano

Bearing undersize table

Unit: mm (in)

HOW TO SELECT MAIN BEARING
When New Cylinder Block and Crankshaft are Used

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

“Main Bearing Selection Table” columns correspond to journal
diameter grade on front side of crankshaft.

Select main bearing grade at the point where selected row and column meet in “Main Bearing Selection
Table”.

When Cylinder Block and Crankshaft are Reused

Measure cylinder block main bearing housing inner diameter and crankshaft main journal diameter. Refer
to

EM-136, "MAIN BEARING HOUSING INNER DIAMETER"

and

EM-137, "CRANKSHAFT MAIN JOUR-

NAL DIAMETER"

Correspond the measured dimension in “Cylinder block main bearing housing inner diameter” row of
“Main Bearing Selection Table”.

Correspond the measured dimension in “Crankshaft main journal diameter” column of “Main Bearing
Selection Table”.

Select main bearing grade at the point where selected row and column meet in following selection table.

Size

Thickness

US 0.25 (0.0098)

1.626 - 1.634 (0.0640 - 0.0643)

SEM756G

SEM452G

CYLINDER BLOCK

EM-131

Revision: 2006 August

2006 Murano

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
underside (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:

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

Bearing undersize table

Unit: mm (in)

Grade number

Thickness

Unit: mm (in)

Width

Unit: mm (in)

Identification color

Remarks

2.000 - 2.003 (0.0787 - 0.0789)

19.9 - 20.1

(0.783 - 0.791)

Black

Grade and color are
the same for upper
and lower bearings.

2.003 - 2.006 (0.0789 - 0.0790)

Brown

2.006 - 2.009 (0.0790 - 0.0791)

Green

2.009 - 2.012 (0.0791 - 0.0792)

Yellow

2.012 - 2.015 (0.0792 - 0.0793)

Blue

2.015 - 2.018 (0.0793 - 0.0794)

Pink

2.018 - 2.021 (0.0794 - 0.0796)

Purple

2.021 - 2.024 (0.0796 - 0.0797)

White

UPR

2.003 - 2.006 (0.0789 - 0.0790)

Brown

Grade and color are
different for upper and
lower bearings.

LWR

2.000 - 2.003 (0.0787 - 0.0789)

Black

UPR

2.006 - 2.009 (0.0790 - 0.0791)

Green

LWR

2.003 - 2.006 (0.0789 - 0.0790)

Brown

UPR

2.009 - 2.012 (0.0791 - 0.0792)

Yellow

LWR

2.006 - 2.009 (0.0790 - 0.0791)

Green

UPR

2.012 - 2.015 (0.0792 - 0.0793)

Blue

LWR

2.009 - 2.012 (0.0791 - 0.0792)

Yellow

UPR

2.015 - 2.018 (0.0793 - 0.0794)

Pink

LWR

2.012 - 2.015 (0.0792 - 0.0793)

Blue

UPR

2.018 - 2.021 (0.0794 - 0.0796)

Purple

LWR

2.015 - 2.018 (0.0793 - 0.0794)

Pink

UPR

2.021 - 2.024 (0.0796 - 0.0797)

White

LWR

2.018 - 2.021 (0.0794 - 0.0796)

Purple

PBIC1908E

Size

Thickness

US 0.25 (0.0098)

2.132 - 2.140 (0.0839 - 0.0843)

EM-132

CYLINDER BLOCK

Revision: 2006 August

2006 Murano

Inspection after Disassembly

NBS0029Z

CRANKSHAFT END PLAY

●

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 crank-
shaft also.

CONNECTING ROD SIDE CLEARANCE

●

Measure the side clearance between connecting rod and crank-
shaft arm with a feeler gauge.

●

If the measured value exceeds the limit, replace connecting rod,
and measure again. If it still exceeds the limit, replace crank-
shaft also.

PISTON TO PISTON PIN OIL CLEARANCE
Piston Pin Hole Diameter

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

Piston Pin Outer Diameter

Measure the outer diameter of piston pin with a micrometer.

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.

Standard

: 0.10 - 0.25 mm (0.0040 - 0.0098 in)

Limit

: 0.30 mm (0.012 in)

EMQ0196D

Standard

: 0.20 - 0.35 mm (0.0080 - 0.0138 in)

Limit

: 0.40 mm (0.0160 in)

PBIC0815E

Standard

: 21.993 - 22.005 mm (0.8659 - 0.8663 in)

PBIC0116E

Standard

: 21.989 - 22.001 mm (0.8657 - 0.8662 in)

PBIC0117E

Standard

: 0.002 - 0.006 mm (0.0001 - 0.0002 in)

Nissan Murano Z50 (2006 year). Manual - part 128