Nissan Frontier. Manual - part 734

PREPARATION

EM-125

< PREPARATION >

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(J-24239-01)
Cylinder head bolt wrench

Loosening and tightening cylinder head bolt, 
and used with angle wrench [SST: 
KV10112100 (BT8653-A)]
a: 13 (0.51) dia.
b: 12 (0.47)
c: 10 (0.39)
Unit: mm (in)

( — )
Valve seat cutter set

Finishing valve seat dimensions

( — )
Piston ring expander

Removing and installing piston ring

( — )
Valve guide drift

Removing and installing valve guide
Intake and Exhaust:
a: 9.5 mm (0.374 in) dia.
b: 5.5 mm (0.217 in) dia.

( — )
Valve guide reamer

(1): Reaming valve guide inner hole
(2): Reaming hole for oversize valve guide
Intake and Exhaust:
d

1

: 6.0 mm (0.236 in) dia.

d

2

: 10.175 - 10.196 mm (0.4006 - 0.4014 in) 

dia.

(J-43897-18)
(J-43897-12)
Oxygen sensor thread cleaner

Reconditioning the exhaust system threads 
before installing a new heated oxygen sensor 
(Use with anti-seize lubricant shown below.)
a: J-43897-18 [18 mm (0.71 in) dia.] for zir-
conia heated oxygen sensor
b: J-43897-12 [12 mm (0.47 in) dia.] for tita-
nia heated oxygen sensor

Tool number
(TechMate No.)
Tool name

Description

NT583

NT048

NT030

NT015

NT016

AEM488

EM-126

< PREPARATION >

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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
(TechMate No.)
Tool name

Description

AEM489

ZZA1210D

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING

EM-127

< SYSTEM DESCRIPTION >

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SYSTEM DESCRIPTION

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING

NVH Troubleshooting - Engine Noise

INFOID:0000000009478093

Use the Chart Below to Help You Find the Cause of the Symptom

INFOID:0000000009478094

1. Locate the area where noise occurs.

PBIC2873E

EM-128

< SYSTEM DESCRIPTION >

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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

EM-134

Rattle

C

A

—

A

B

C

Camshaft 
bearing 
noise

Camshaft runout
Camshaft journal oil 
clearance

EM-193
EM-193

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-230

 

EM-230

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-230
EM-230
EM-230
EM-230

Knock

A

B

C

B

B

B

Connect-
ing rod 
bearing 
noise

Connecting rod bushing 
oil clearance
Connecting rod bearing 
oil clearance

EM-230
EM-230

Knock

A

B

—

A

B

C

Main bear-
ing noise

Main bearing oil clear-
ance
Crankshaft runout

EM-230
EM-230

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

EM-176
EM-184

Front of 
engine

Squeak-
ing or fizz-
ing

A

B

—

B

—

C

Drive belts 
(Sticking 
or slip-
ping)

Drive belts deflection

EM-129

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

CO-50

Rattle

—

—

A

—

—

—

VTC

VTC lock pin clearance

EM-193