Infiniti F50. Manual - part 530

PREPARATION

EM-7

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EM

Commercial Service Tools

EBS001L6

—
(J- 45476)
Ring gear stopper

Removing and installing crankshaft pulley     

—
(J-45488)
Quick connector release

Removing fuel tube quick connectors in 
engine room
(Available in SEC. 164 of  PARTS CATALOG: 
Part No. 16441 6N210)     

Tool number
(Kent-Moore No.)
Tool name

Description

PBIC1655E

PBIC0198E

(Kent-Moore No.)
Tool name

Description

Power tool

Loosening bolts and nuts

Spark plug wrench

Removing and installing spark plug

(J24239-01)
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

PBIC0190E

S-NT047

NT583

S-NT048

EM-8

PREPARATION

Piston ring expander

Removing and installing piston ring

Valve guide drift

Removing and installing valve guide
Intake & 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 & Exhaust:
d

1 

 : 6.0 mm (0.236 in) dia.

d

2 

 : 10.2 mm (0.402 in) dia.

Front oil seal drift

Installing front oil seal when front cover is 
removed

Rear oil seal drift

Installing rear oil seal

(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 dia.) for zirconia 
heated oxygen sensor
b: J-43897-12 (12 mm dia.) for titania 
heated oxygen sensor

Anti-seize lubricant (Permatex 133AR 
or equivalent meeting MIL 
specification MIL-A-907)

Lubricating heated oxygen sensor thread 
cleaning tool when reconditioning exhaust 
system threads

(Kent-Moore No.)
Tool name

Description

S-NT030

S-NT015

S-NT016

ZZA0012D

ZZA0025D

AEM488

AEM489

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING

EM-9

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EM

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING

PFP:00003

NVH Troubleshooting —Engine Noise

EBS002MG

PBIC0192E

EM-10

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING

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

EBS002MH

1.

Locate the area where noise occurs.

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 
engine
Rocker 
cover
Cylinder 
head

Ticking or 
clicking

C

A

—

A

B

—

Tappet noise

Valve clearance

EM-52

Rattle

C

A

—

A

B

C

Camshaft 
bearing noise

Camshaft journal clear-
ance
Camshaft runout

EM-50
EM-49

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

Slap or 
knock

—

A

—

B

B

—

Piston pin 
noise

Piston and piston pin 
clearance
Connecting rod bush-
ing oil clearance (Small 
end)

EM-88
EM-90

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-92
EM-89
EM-89
EM-90

Knock

A

B

C

B

B

B

Connecting 
rod bearing 
noise

Connecting rod bush-
ing oil clearance (Small 
end)
Connecting rod bear-
ing (Big end)

EM-90
EM-90

Knock

A

B

—

A

B

C

Main bearing 
noise

Main bearing oil clear-
ance
Crankshaft runout

EM-95
EM-94

Front of 
engine
Timing 
chain 
cover

Tapping or 
ticking

A

A

—

B

B

B

Timing chain 
and chain 
tensioner 
noise

Timing chain cracks 
and wear
Timing chain tensioner 
operation

EM-39
EM-35

Front of 
engine

Squeak-
ing or fizz-
ing

A

B

—

B

—

C

Drive belts 
(Sticking or 
slipping)

Drive belts deflection

EM-12

Creaking

A

B

A

B

A

B

Drive belts 
(Slipping)

Idler pulley bearing 
operation

Squall
Creak

A

B

—

B

A

B

Water pump 
noise

Water pump operation

CO-22