Nissan Murano Z50 (2005 year). Manual

CYLINDER BLOCK

EM-125

Revision: 2005 August

2005 Murano

17. 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.

18. 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 guide pin and drive
plate side guide 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

ABS00A3U

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*

—

EM-126

CYLINDER BLOCK

Revision: 2005 August

2005 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-135, "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)

CYLINDER BLOCK

EM-127

Revision: 2005 August

2005 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-133, "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-137, "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

EM-128

CYLINDER BLOCK

Revision: 2005 August

2005 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-135, "MAIN BEARING HOUSING INNER DIAMETER"

and

EM-136, "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

EM-130

CYLINDER BLOCK

Revision: 2005 August

2005 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)

CYLINDER BLOCK

EM-131

Revision: 2005 August

2005 Murano

Inspection After Disassembly

ABS00A3V

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 (0.0039 - 0.0098 in)

Limit

: 0.30 mm (0.0118 in)

EMQ0196D

Standard

: 0.20 - 0.35 mm (0.0079 - 0.0138 in)

Limit

: 0.40 mm (0.0157 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)

EM-132

CYLINDER BLOCK

Revision: 2005 August

2005 Murano

●

When replacing piston and piston pin assembly, refer to

EM-126, "HOW TO SELECT PISTON"

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.)

PISTON RING SIDE CLEARANCE

●

Measure side clearance of piston ring and piston ring groove
with a feeler gauge.

●

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

●

Make sure that the cylinder bore inner diameter is within the
specification. Refer to

EM-135, "Cylinder Bore Inner Diameter"

●

Lubricate with new engine oil to piston and piston ring, and then
insert piston ring until middle of cylinder with piston, and mea-
sure piston ring end gap with feeler gauge.

●

If the measured value exceeds the limit, replace piston ring, and measure again. If it still exceeds the limit,
re-bore cylinder and use oversize piston and piston rings.

Standard:

Top ring

: 0.045 - 0.080 mm (0.0018 - 0.0031 in)

2nd ring

: 0.030 - 0.070 mm (0.0012 - 0.0028 in)

Oil ring

: 0.065 - 0.135 mm (0.0026 - 0.0053 in)

Limit:

Top ring

: 0.11 mm (0.0043 in)

2nd ring

: 0.10 mm (0.0039 in)

SEM024AA

Standard:

Top ring

: 0.23 - 0.33 mm (0.0091 - 0.0130 in)

2nd ring

: 0.33 - 0.48 mm (0.0130 - 0.0189 in)

Oil ring

: 0.20 - 0.50 mm (0.0079 - 0.0197 in)

Limit:

Top ring

: 0.54 mm (0.0213 in)

2nd ring

: 0.80 mm (0.0315 in)

Oil ring

: 0.95 mm (0.0374 in)

PBIC0118E

CYLINDER BLOCK

EM-133

Revision: 2005 August

2005 Murano

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-119, "ASSEMBLY"

for the tightening proce-

dure.

●

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.

Bend:

Limit : 0.15 mm (0.0059 in) per 100 mm (3.94 in) length

Torsion:

Limit : 0.30 mm (0.0118 in) per 100 mm (3.94 in) length

PBIC2077E

Standard

: 55.000 - 55.013 mm (2.1654 - 2.1659 in)

PBIC1641E

Standard

: 22.000 - 22.012 mm (0.8661 - 0.8666 in)

PBIC0120E

EM-134

CYLINDER BLOCK

Revision: 2005 August

2005 Murano

Piston Pin Outer Diameter

Measure the outer diameter of piston pin with a micrometer.

Connecting Rod Bushing Oil Clearance

(Connecting rod bushing oil clearance) = (Connecting rod bushing inner diameter) – (Piston pin outer diame-
ter)

●

If the calculated value exceeds the limit, replace connecting rod assembly and/or piston and piston pin
assembly.

●

If replacing piston and piston pin assembly, refer to

EM-126, "HOW TO SELECT PISTON"

●

If replacing connecting rod assembly, refer to

EM-137, "CON-

NECTING ROD BEARING OIL CLEARANCE"

to select the con-

necting rod bearing.

Factory installed parts grading:

●

Service parts apply only to grade “0”.

Unit: mm (in)

*: After installing in connecting rod

CYLINDER BLOCK 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.

Standard

: 21.989 - 22.001 mm (0.8657 - 0.8662 in)

PBIC0117E

Standard

: 0.005 - 0.017 mm (0.0002 - 0.0007 in)

Limit

: 0.030 mm (0.0012 in)

PBIC0809E

Grade

Connecting rod bushing
inner diameter *

22.000 - 22.006
(0.8661 - 0.8664)

22.006 - 22.012
(0.8664 - 0.8666)

Piston pin hole diameter

21.993 - 21.999
(0.8659 - 0.8661)

21.999 - 22. 005
(0.8661 - 0.8663)

Piston pin outer diameter

21.989 - 21.995
(0.8657- 0.8659)

21.995 - 22.001
(0.8659 - 0.8662)

PBIC0812E

CYLINDER BLOCK

EM-135

Revision: 2005 August

2005 Murano

●

Measure the distortion on the cylinder block upper face at some
different points in six directions with a straightedge and a feeler
gauge.

●

If it exceeds the limit, replace cylinder block.

MAIN BEARING HOUSING INNER DIAMETER

●

Install main bearing caps and main bearing beam without install-
ing main bearings, and tighten main bearing cap bolts to the
specified torque. Refer to

EM-119, "ASSEMBLY"

for the tighten-

ing procedure.

●

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

●

If out of the standard, replace cylinder block and main a bearing
caps as assembly.

NOTE:
Cylinder block cannot be replaced as a single part, because it is
machined together with main bearing caps.

PISTON TO CYLINDER BORE CLEARANCE
Cylinder Bore Inner Diameter

●

Using a bore gauge, measure cylinder bore for wear, out-of-
round and taper at six different points on each cylinder. (“X” and
“Y” directions at “A”, “B” and “C”) (“Y” is in longitudinal direction
of engine)

●

If the measured value exceeds the limit, or if there are scratches
and/or seizure on the cylinder inner wall, hone or re-bore the
inner wall.

●

Oversize piston is provided. When using oversize piston, re-
bore cylinder so that the clearance of the piston-to-cylinder bore
satisfies the standard.

CAUTION:

When using oversize piston, use oversize pistons for all
cylinders with oversize piston rings.

Limit

: 0.1 mm (0.004 in)

SEM123C

Standard

: 63.993 - 64.017 mm (2.5194 - 2.5203 in)

PBIC1643E

Standard inner diameter:

95.500 - 95.530 mm (3.7598 - 3.7610 in)

Wear limit:

0.2 mm (0.008 in)

Out-of-round (Difference between “X” and “Y”):

Limit : 0.015 mm (0.0006 in)

Taper (Difference between “A” and “C”):

Limit : 0.01 mm (0.0004 in)

Oversize (OS)

: 0.2 mm (0.008 in)

PBIC0923E

SEM843E

EM-136

CYLINDER BLOCK

Revision: 2005 August

2005 Murano

Piston Skirt Diameter

Measure the outer diameter of piston skirt with a micrometer.

Piston to Cylinder Bore Clearance

Calculate by piston skirt diameter and cylinder bore inner diameter (direction “Y”, position “B”).
(Clearance) = (Cylinder bore inner diameter) – (Piston skirt diameter).

●

If the calculated value exceeds the limit, replace piston and piston pin assembly. Refer to

EM-126, "HOW

TO SELECT PISTON"

Re-boring Cylinder Bore

Cylinder bore size is determined by adding piston to cylinder bore clearance to piston skirt diameter.

Install main bearing caps and main bearing beam, and tighten to the specified torque. Otherwise, cylinder
bores may be distorted in final assembly.

Cut cylinder bores.
NOTE:

●

When any cylinder needs boring, all other cylinders must also be bored.

●

Do not cut too much out of cylinder bore at a time. Cut only 0.05 mm (0.0020 in) or so in diameter at a
time.

Hone cylinders to obtain the specified piston to cylinder bore clearance.

Measure finished cylinder bore for the out-of-round and taper.
NOTE:
Measurement should be done after cylinder bore cools down.

CRANKSHAFT MAIN JOURNAL DIAMETER

●

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

●

If out of the standard, measure the main bearing oil clearance. Then use undersize bearing. Refer to

EM-

138, "MAIN BEARING OIL CLEARANCE"

Measure point

: Distance from the top 41.0 mm (1.614 in)

Standard

: 95.480 - 95.510 mm (3.7590 - 3.7602 in)

PBIC0125E

Standard

: 0.010 - 0.030 mm (0.0004 - 0.0012 in)

Limit

: 0.08 mm (0.0031 in)

Re-bored size calculation: D = A + B – C

where,

D: Bored diameter

A: Piston skirt diameter as measured

B: Piston to cylinder bore clearance (standard value)

C: Honing allowance 0.02 mm (0.0008 in)

Standard

: 59.951 - 59.975 mm (2.3603 - 2.3612 in) dia.

CYLINDER BLOCK

EM-137

Revision: 2005 August

2005 Murano

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-137,

"CONNECTING ROD BEARING OIL CLEARANCE"

CRANKSHAFT OUT-OF-ROUND AND TAPER

●

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 the dimensions
between “X” and “Y” at “A” and “B”.

●

Taper is indicated by the difference in the dimensions between
“A” and “B” at “X” and “Y”.

●

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 the main bearing and/or connecting rod bearing. Refer to

EM-138, "MAIN BEARING OIL CLEAR-

ANCE"

and/or

EM-137, "CONNECTING ROD BEARING OIL CLEARANCE"

CRANKSHAFT RUNOUT

●

Place V-block on precise flat table, and support the journals on
the both end of crankshaft.

●

Place a dial indicator straight up on the No. 3 journal.

●

While rotating crankshaft, read the movement of the pointer on a
dial indicator. (Total indicator reading)

●

If it exceeds the limit, replace crankshaft.

CONNECTING ROD BEARING OIL CLEARANCE
Method by Calculation

●

Install connecting rod bearings to connecting rod and connect-
ing rod cap, and tighten connecting rod bolts to the specified
torque. Refer to

EM-119, "ASSEMBLY"

for the tightening proce-

dure.

●

Measure the inner diameter of connecting rod bearing with an
inside micrometer.

(Oil clearance) = (Connecting rod bearing inner diameter) – (Crank-
shaft pin journal diameter)

Standard

: 51.956 - 51.974 mm (2.0455 - 2.0462 in) dia.

PBIC0127E

Limit:

Out-of-round (Difference between “X” and “Y”)

: 0.002 mm (0.0001 in)

Taper (Difference between “A” and “B”)

: 0.002 mm (0.0001 in)

SBIA0535E

Standard

: Less than 0.05 mm (0.002 in)

Limit

: 0.10 mm (0.0039 in)

SEM346D

PBIC1642E

EM-138

CYLINDER BLOCK

Revision: 2005 August

2005 Murano

●

If the calculated value exceeds the limit, select proper connecting rod bearing according to connecting rod
big end diameter and crankshaft pin journal diameter to obtain the specified bearing oil clearance. Refer
to

EM-127, "HOW TO SELECT CONNECTING ROD BEARING"

Method of Using Plastigage

●

Remove oil and dust on crankshaft pin journal and the surfaces of each bearing completely.

●

Cut a plastigage slightly shorter than the bearing width, and place it in crankshaft axial direction, avoiding
oil holes.

●

Install connecting rod bearings to connecting rod and connecting rod bearing cap, and tighten connecting
rod bolts to the specified torque. Refer to

EM-119, "ASSEMBLY"

for the tightening procedure.

CAUTION:

Do not rotate crankshaft.

●

Remove connecting rod bearing cap and bearings, and using
the scale on the plastigage bag, measure the plastigage width.

NOTE:
The procedure when the measured value exceeds the limit is
same as that described in the “Method by Calculation”.

MAIN BEARING OIL CLEARANCE
Method by Calculation

●

Install main bearings to cylinder block and main bearing caps,
and tighten main bearing cap bolts with main bearing beam to
the specified torque. Refer to

EM-119, "ASSEMBLY"

for the

tightening procedure.

●

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

(Oil clearance) = (Main bearing inner diameter) – (Crankshaft main
journal diameter)

●

If the calculated value exceeds the limit, select proper main bearing according to main bearing inner diam-
eter and crankshaft main journal diameter to obtain the specified bearing oil clearance. Refer to

EM-128,

"HOW TO SELECT MAIN BEARING"

Method of Using Plastigage

●

Remove oil and dust on crankshaft main journal and the surfaces of each bearing completely.

●

Cut a plastigage slightly shorter than the bearing width, and place it in crankshaft axial direction, avoiding
oil holes.

●

Install main bearings to cylinder block and main bearing caps, and tighten main bearing bolts with main
bearing beam to the specified torque. Refer to

EM-119, "ASSEMBLY"

for the tightening procedure.

CAUTION:

Do not rotate crankshaft.

Standard

: 0.034 - 0.059 mm (0.0013 - 0.0023 in)

(actual clearance)

Limit

: 0.070 mm (0.0028 in)

PBIC1149E

Standard

: 0.035 - 0.045 mm (0.0014 - 0.0018 in)

(actual clearance)

Limit

: 0.065 mm (0.0026 in)

PBIC1644E

CYLINDER BLOCK

EM-139

Revision: 2005 August

2005 Murano

●

Remove main bearing caps and bearings, and using the scale
on the plastigage bag, measure the plastigage width.

NOTE:
The procedure when the measured value exceeds the limit is
same as that described in the “Method by Calculation”.

CRUSH HEIGHT OF MAIN BEARING

●

When main bearing cap is removed after being tightened to the
specified torque with main bearings installed, the tip end of bear-
ing must protrude. Refer to

EM-119, "ASSEMBLY"

for the tight-

ening procedure.

●

If the standard is not met, replace main bearings.

CRUSH HEIGHT OF CONNECTING ROD BEARING

●

When connecting rod bearing cap is removed after being tight-
ened to the specified torque with connecting rod bearings
installed, the tip end of bearing must protrude. Refer to

EM-119,

"ASSEMBLY"

for the tightening procedure.

●

If the standard is not met, replace connecting rod bearings.

MAIN BEARING CAP BOLT OUTER DIAMETER

●

Measure the outer diameters (“d

”, “d

”) at two positions as

shown in the figure.

●

If reduction appears in “A” range, regard it as “d

”.

●

If it exceeds the limit (large difference in dimensions), replace
main bearing cap bolt with new one.

PBIC1149E

Standard

: There must be crush height.

SEM502G

Standard

: There must be crush height.

PBIC1646E

Limit (“d

” – “d

”)

: 0.11 mm (0.0051 in)

PBIC0911E

EM-140

CYLINDER BLOCK

Revision: 2005 August

2005 Murano

CONNECTING ROD BOLT OUTER DIAMETER

●

Measure the outer diameter “d” at position shown in the figure.

●

If the reduction appears in a position other than “d”, regard it as
“d”.

●

When “d” exceeds the limit (when it becomes thinner), replace
connecting rod bolt with new one.

DRIVE PLATE

●

Check drive plate and signal plate for deformation or cracks.

CAUTION:

●

Do not disassemble drive plate.

●

Do not 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.

●

If anything is found, replace drive plate.

OIL JET

●

Check nozzle for deformation and damage.

●

Blow compressed air from nozzle, and check for clogs.

●

If it is not satisfied, clean or replace oil jet.

OIL JET RELIEF VALVE

●

Using a clean plastic stick, press check valve in oil jet relief
valve. Make sure that valve moves smoothly with proper reac-
tion force.

●

If it is not satisfied, replace oil jet relief valve.

Standard

: 7.90 - 8.00 mm (0.3110 - 0.3150 in)

Limit

: 7.75 mm (0.3051 in)

PBIC0912E

SEM760G

EMU0468D

Nissan Murano Z50 (2005 year). Manual - part 132