Nissan X-Trail 32. Manual — 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
Rattle
C
A
—
A
B
C
Camshaft
bearing
noise
Camshaft journal oil
clearance
Camshaft runout
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
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
Knock
A
B
C
B
B
B
Connect-
ing rod
bearing
noise
Connecting rod bushing
oil clearance
Connecting rod bearing
oil clearance
Knock
A
B
—
A
B
C
Main bear-
ing noise
Main bearing oil clear-
ance
Crankshaft runout
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
Front of
engine
Squeak-
ing or fizz-
ing
A
B
—
B
—
C
Drive belt
(Sticking
or slip-
ping)
Drive belt deflection
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
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
2.
Remove front fillet molding (RH). Refer to
.
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
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-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
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст