Nissan X-Trail 32. Instruction — part 1031

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING

EM-21

< SYMPTOM DIAGNOSIS >

[MR20DD]

C

D

E

F

G

H

I

J

K

L

M

A

EM

N

P

O

A: Closely related

B: Related

C: Sometimes related

—: Not related

Location

of noise

Type of

noise

Operating condition of engine

Source of

noise

Check item

Refer-

ence page

Before

warm-

up

After

warm-

up

When

start-

ing

When

idling

When

racing

While

driving

Top of en-
gine
Rocker
cover
Cylinder
head

Ticking or
clicking

C

A

—

A

B

—

Tappet
noise

Valve clearance

EM-16

Rattle

C

A

—

A

B

C

Camshaft
bearing
noise

Camshaft journal oil
clearance
Camshaft runout

EM-133

Crank-
shaft pul-
ley
Cylinder
block
(Side of
engine)
Oil pan

Slap or
knock

—

A

—

B

B

—

Piston pin
noise

Piston to piston pin oil
clearance
Connecting rod bushing
oil clearance

EM-137

Slap or
rap

A

—

—

B

B

A

Piston
slap noise

Piston to cylinder bore
clearance
Piston ring side clear-
ance
Piston ring end gap
Connecting rod bend
and torsion

EM-137

Knock

A

B

C

B

B

B

Connect-
ing rod
bearing
noise

Connecting rod bushing
oil clearance
Connecting rod bearing
oil clearance

EM-137
EM-140

Knock

A

B

—

A

B

C

Main bear-
ing noise

Main bearing oil clear-
ance
Crankshaft runout

EM-141
EM-137

Front of
engine
Front cov-
er

Tapping or
ticking

A

A

—

B

B

B

Timing
chain and
chain ten-
sioner
noise

Timing chain cracks
and wear
Timing chain tensioner
operation

EM-78
EM-67

Front of
engine

Squeak-
ing or fizz-
ing

A

B

—

B

—

C

Drive belt
(Sticking
or slip-
ping)

Drive belt deflection

EM-22

Creaking

A

B

A

B

A

B

Drive belt
(Slipping)

Idler pulley bearing op-
eration

Squall
Creak

A

B

—

B

A

B

Water
pump
noise

Water pump operation

CO-24

EM-22

< PERIODIC MAINTENANCE >

[MR20DD]

DRIVE BELTS

PERIODIC MAINTENANCE

DRIVE BELTS

Exploded View

INFOID:0000000010783672

Removal and Installation

INFOID:0000000010783673

REMOVAL

1.

Remove front wheel and tire (RH). Refer to

WT-61, "Exploded View"

.

2.

Remove front fillet molding (RH). Refer to

EXT-31, "Exploded View"

.

3.

Remove front fender protector (RH). Refer to

EXT-35, "FENDER PROTECTOR : Exploded View"

.

4.

Hold the hexagonal part

of drive belt auto-tensioner

with a

wrench securely. Then move the wrench handle in the direction
of arrow (loosening direction of tensioner).

CAUTION:

Avoid placing hand in a location where pinching may occur
if the holding tool accidentally comes off.

5.

Insert a rod approximately 6 mm (0.24 in) in diameter such as
short-length screwdriver into the hole

of the retaining boss to

drive belt auto-tensioner.
• Keep drive belt auto-tensioner pulley arm locked after drive

belt is removed.

INSTALLATION

CAUTION:

• Confirm drive belt is completely set to pulleys.
• Check for engine oil, working fluid and engine coolant are not adhered to drive belt and each pulley

groove.

1.

Release drive belt auto-tensioner, and apply tension to drive belt.

2.

Turn crankshaft pulley clockwise several times to equalize tension between each pulley.

3.

Confirm tension of drive belt at indicator (notch on fixed side) is within the possible use range. Refer to

EM-22, "Exploded View"

.

Alternator

Drive belt auto-tensioner

Crankshaft pulley

A/C compressor

Water pump

Drive belt

Possible use range

Range when new drive belt is in-
stalled

Indicator

JPBIA4302ZZ

JPBIA4351ZZ

DRIVE BELTS

EM-23

< PERIODIC MAINTENANCE >

[MR20DD]

C

D

E

F

G

H

I

J

K

L

M

A

EM

N

P

O

Inspection

INFOID:0000000010783674

WARNING:

Perform this step when engine is stopped.
• Check that the indicator (notch on fixed side) of drive belt auto-tensioner is within the possible use range

in the figure.
NOTE:
• Check the drive belt auto-tensioner indication when the engine is cold.
• When new drive belt is installed, the indicator (notch on fixed side) should be within the range

in the fig-

ure.

• Visually check entire drive belts for wear, damage or cracks.
• If the indicator (notch on fixed side) is out of the possible use range or belts is damaged, replace belts.

Adjustment

INFOID:0000000010783675

Alternator

Drive belt auto-tensioner

Crankshaft pulley

A/C compressor

Water pump

Drive belt

Possible use range

Range when new drive belt is in-
stalled

Indicator

JPBIA4302ZZ

Refer to

:

EM-132, "Drive Belt"

.

EM-24

< PERIODIC MAINTENANCE >

[MR20DD]

AIR CLEANER FILTER

AIR CLEANER FILTER

Exploded View

INFOID:0000000010783676

Air duct assembly

Mounting rubber

Bracket

Bracket

Air duct 1

Resonator duct

Resonator

Grommet

Collar

Air duct 2

Air cleaner cover

Air cleaner filter

Mounting rubber

Bracket

Air cleaner body

Mass air flow sensor

Clamp

PCV hose

To electric throttle control actuator

To rocker cover

: Always replace after every disassembly.

: N·m (kg-m, in-lb)

JPBIA6796GB