Nissan Frontier D40. Manual — part 598
EM-124
< PREPARATION >
[VQ40DE]
PREPARATION
(
—
)
Anti-seize lubricant (Permatex 133AR
or equivalent meeting MIL specifica-
tion MIL-A-907)
Lubricating oxygen sensor thread cleaning
tool when reconditioning exhaust system
threads
(
—
)
Manual lift table caddy
Removing and installing engine
Tool number
(Kent-Moore No.)
Tool name
Description
AEM489
ZZA1210D
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
EM-125
< FUNCTION DIAGNOSIS >
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FUNCTION DIAGNOSIS
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
NVH Troubleshooting - Engine Noise
INFOID:0000000005274312
Use the Chart Below to Help You Find the Cause of the Symptom
INFOID:0000000005274313
1.
Locate the area where noise occurs.
PBIC2873E
EM-126
< FUNCTION DIAGNOSIS >
[VQ40DE]
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
2.
Confirm the type of noise.
3.
Specify the operating condition of engine.
4.
Check specified noise source.
If necessary, repair or replace these parts.
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 runout
Camshaft journal oil
clearance
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
Timing
chain case
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 belts
(Sticking
or slip-
ping)
Drive belts deflection
Creaking
A
B
A
B
A
B
Drive belts
(Slipping)
Idler pulley bearing op-
eration
Squall
Creak
A
B
—
B
A
B
Water
pump
noise
Water pump operation
Rattle
—
—
A
—
—
—
VTC
VTC lock pin clearance
DRIVE BELTS
EM-127
< ON-VEHICLE MAINTENANCE >
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ON-VEHICLE MAINTENANCE
DRIVE BELTS
Exploded View
INFOID:0000000005274314
Checking Drive Belts
INFOID:0000000005274315
WARNING:
Be sure to perform when the engine is stopped.
1.
Remove air duct and resonator assembly when inspecting drive belt. Refer to
.
2.
Make sure that the auto tensioner indicator is within the allow-
able working range (A) as shown.
3.
Visually check entire belt for wear, damage or cracks.
4.
If the indicator is out of allowable working range or drive belt is
damaged, replace the drive belt. Refer to
Adjustment
INFOID:0000000005274316
There is no manual drive belt tension adjustment. The drive belt tension is automatically adjusted by the drive
belt auto tensioner.
Removal and Installation
INFOID:0000000005274317
REMOVAL
1.
Remove the engine room cover. Refer to
EM-138, "Removal and Installation"
2.
Remove air duct and resonator assembly. Refer to
EM-139, "Removal and Installation"
.
LBIA0427E
1.
Drive belt
2.
Power steering oil pump pulley
3.
Generator pulley
4.
Crankshaft pulley
5.
A/C compressor
6.
Cooling fan pulley
7.
Idler pulley
8.
Drive belt tensioner
AWBIA0723ZZ
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