Cylinder INFINITI FX35 2004 Service Manual

EC-1254
[VK45DE]
VARIABLE INDUCTION AIR CONTROL SYSTEM (VIAS)
Revision: 2004 November 2004 FX35/FX45
VARIABLE INDUCTION AIR CONTROL SYSTEM (VIAS)PFP:14956
DescriptionABS00CED
SYSTEM DESCRIPTION
*: The ECM determines the start signal status by the signals of engine speed and battery voltage.
When the engine is running at low or medium speed, the power valve is fully closed. Under this condition, the
effective suction port length is equivalent to the total length of the intake manifold collector's suction port
including the intake valve. This long suction port provides increased air intake which results in improved suc-
tion efficiency and higher torque generation.
The surge tank and one-way valve are provided. When engine is running at high speed, the ECM sends the
signal to the VIAS control solenoid valve. This signal introduces the intake manifold vacuum into the power
valve actuator and therefore opens the power valve to two suction passages together in the collector.
Under this condition, the effective port length is equivalent to the length of the suction port provided indepen-
dently for each cylinder. This shortened port length results in enhanced engine output with reduced suction
resistance under high speeds.
The power valve is always open regardless of the engine speed when gear position is in N or P.
Sensor Input signal to ECM ECM function Actuator
Mass air flow sensor Amount of intake air
VIAS control VIAS control solenoid valve Throttle position sensor Throttle position
Accelerator pedal position sensor Accelerator pedal position
Battery Battery voltage*
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)Engine speed*
Engine coolant temperature sensor Engine coolant temperature
PBIB1876E

EC-1276
[VK45DE]
INJECTOR CIRCUIT
Revision: 2004 November 2004 FX35/FX45
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
Diagnostic ProcedureABS00CER
1. INSPECTION START
Turn ignition switch to START.
Is any cylinder ignited?
Ye s o r N o
Yes >> GO TO 2.
No >> GO TO 3.
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
21
22
23
40
41
42
44
63W
R
P
PU
BR
B
OR
GInjector No. 5
Injector No. 3
Injector No. 1
Injector No. 6
Injector No. 4
Injector No. 2
Injector No. 7
Injector No. 8[Engine is running]

Warm-up condition

Idle speed
NOTE:
The pulse cycle changes depending on rpm at idleBATTERY VOLTAGE
(11 - 14V)
[Engine is running]

Warm-up condition

Engine speed is 2,000 rpmBATTERY VOLTAGE
(11 - 14V)
PBIB0042E
PBIB0043E

EM-2Revision: 2004 November 2004 FX35/FX45 FUEL INJECTOR AND FUEL TUBE ........................ 45
Removal and Installation ........................................ 45
REMOVAL ........................................................... 46
INSTALLATION .................................................... 47
INSPECTION AFTER INSTALLATION ................ 49
ROCKER COVER ..................................................... 51
Removal and Installation ........................................ 51
REMOVAL ........................................................... 51
INSTALLATION .................................................... 52
FRONT TIMING CHAIN CASE ................................. 54
Removal and Installation ........................................ 54
REMOVAL ........................................................... 54
INSTALLATION .................................................... 58
INSPECTION AFTER INSTALLATION ................ 62
TIMING CHAIN .......................................................... 63
Removal and Installation ........................................ 63
REMOVAL ........................................................... 64
INSPECTION AFTER REMOVAL ........................ 71
INSTALLATION .................................................... 71
INSPECTION AFTER INSTALLATION ................ 80
CAMSHAFT ............................................................... 82
Removal and Installation ........................................ 82
REMOVAL ........................................................... 83
INSPECTION AFTER REMOVAL ........................ 84
INSTALLATION .................................................... 87
Valve Clearance ...................................................... 89
INSPECTION ....................................................... 89
ADJUSTMENT .................................................... 92
OIL SEAL .................................................................. 94
Removal and Installation of Valve Oil Seal ............. 94
REMOVAL ........................................................... 94
INSTALLATION .................................................... 94
Removal and Installation of Front Oil Seal ............. 95
REMOVAL ........................................................... 95
INSTALLATION .................................................... 96
Removal and Installation of Rear Oil Seal .............. 96
REMOVAL ........................................................... 96
INSTALLATION .................................................... 96
CYLINDER HEAD ..................................................... 98
On-Vehicle Service ................................................. 98
CHECKING COMPRESSION PRESSURE ......... 98
Removal and Installation ........................................ 99
REMOVAL ........................................................... 99
INSPECTION AFTER REMOVAL ......................100
INSTALLATION ..................................................101
Disassembly and Assembly ..................................102
DISASSEMBLY .................................................103
ASSEMBLY .......................................................103
Inspection After Disassembly ...............................104
VALVE DIMENSIONS ........................................104
VALVE GUIDE CLEARANCE ............................105
VALVE GUIDE REPLACEMENT .......................105
VALVE SEAT CONTACT ...................................107
VALVE SEAT REPLACEMENT .........................107
VALVE SPRING SQUARENESS .......................108
VALVE SPRING DIMENSIONS AND VALVE SPRING PRESSURE LOAD ..............................109
ENGINE ASSEMBLY ...............................................110
Removal and Installation .......................................110
2WD MODEL .....................................................110
REMOVAL .......................................................... 111
INSTALLATION ..................................................113
INSPECTION AFTER INSTALLATION ..............113
AWD MODEL .....................................................115
REMOVAL ..........................................................115
INSTALLATION ..................................................118
INSPECTION AFTER INSTALLATION ..............118
CYLINDER BLOCK .................................................120
Disassembly and Assembly ..................................120
DISASSEMBLY ..................................................121
ASSEMBLY ........................................................126
How to Select Piston and Bearing ........................131
DESCRIPTION ..................................................131
HOW TO SELECT PISTON ...............................131
HOW TO SELECT CONNECTING ROD BEAR-
ING .....................................................................132
HOW TO SELECT MAIN BEARING ..................133
Inspection After Disassembly ................................136
CRANKSHAFT END PLAY ................................136
CONNECTING ROD SIDE CLEARANCE .........136
PISTON TO PISTON PIN OIL CLEARANCE .....136
PISTON RING SIDE CLEARANCE ...................137
PISTON RING END GAP ..................................137
CONNECTING ROD BEND AND TORSION .....138
CONNECTING ROD BEARING HOUSING
DIAMETER (BIG END) ......................................138
CONNECTING ROD BUSHING OIL CLEAR-
ANCE (SMALL END) .........................................138
CYLINDER BLOCK DISTORTION ....................139
MAIN BEARING HOUSING INNER DIAMETER .140
PISTON TO CYLINDER BORE CLEARANCE ..140
CRANKSHAFT MAIN JOURNAL DIAMETER ...141
CRANKSHAFT PIN JOURNAL DIAMETER ......142
CRANKSHAFT OUT-OF-ROUND AND TAPER .142
CRANKSHAFT RUNOUT ..................................142
CONNECTING ROD BEARING OIL CLEAR-
ANCE .................................................................142
MAIN BEARING OIL CLEARANCE ...................143
MAIN BEARING CRUSH HEIGHT ....................144
CONNECTING ROD BEARING CRUSH
HEIGHT .............................................................144
MAIN BEARING CAP BOLT OUTER DIAMETER .144
CONNECTING ROD BOLT OUTER DIAMETER .144
DRIVE PLATE ....................................................145
OIL JET ..............................................................145
OIL JET RELIEF VALVE ....................................145
SERVICE DATA AND SPECIFICATIONS (SDS) ....146
Standard and Limit ................................................146
GENERAL SPECIFICATIONS ...........................146
DRIVE BELT ......................................................147
INTAKE MANIFOLD COLLECTOR, INTAKE

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Revision: 2004 November 2004 FX35/FX45MANIFOLD AND EXHAUST MANIFOLD ......... 147
SPARK PLUG ................................................... 147
CAMSHAFT AND CAMSHAFT BEARING ........ 148
CYLINDER HEAD ............................................. 150
CYLINDER BLOCK ........................................... 153
PISTON, PISTON RING AND PISTON PIN ...... 154
CONNECTING ROD ......................................... 155
CRANKSHAFT .................................................. 156
MAIN BEARING ................................................ 157
CONNECTING ROD BEARING ........................ 158
VK45DE
PRECAUTIONS ...................................................... 159
Precautions Necessary for Steering Wheel Rotation
After Battery Disconnect ...................................... 159
OPERATION PROCEDURE ............................. 159
Precautions for Drain Engine Coolant .................. 159
Precautions for Disconnecting Fuel Piping .......... 159
Precautions for Removal and Disassembly ......... 159
Precautions for Inspection, Repair and Replace-
ment ..................................................................... 159
Precautions for Assembly and Installation ........... 159
Parts Requiring Angle Tightening ......................... 160
Precautions for Liquid Gasket .............................. 160
REMOVAL OF LIQUID GASKET SEALING ...... 160
LIQUID GASKET APPLICATION PROCEDURE . 160
PREPARATION ....................................................... 162
Special Service Tools ........................................... 162
Commercial Service Tools .................................... 164
NOISE, VIBRATION AND HARSHNESS (NVH)
TROUBLESHOOTING ............................................ 166
NVH Troubleshooting —Engine Noise ................. 166
Use the Chart Below to Help You Find the Cause
of the Symptom. ................................................... 167
ENGINE ROOM COVER ........................................ 168
Removal and Installation ...................................... 168
REMOVAL ......................................................... 168
INSTALLATION ................................................. 168
DRIVE BELTS ......................................................... 169
Checking Drive Belts ............................................ 169
Tension Adjustment .............................................. 169
Removal and Installation ...................................... 169
REMOVAL ......................................................... 169
INSTALLATION ................................................. 170
Drive Belt Auto Tensioner and Idler Pulley ........... 171
REMOVAL ......................................................... 171
INSTALLATION ................................................. 171
AIR CLEANER AND AIR DUCT ............................. 172
Removal and Installation ...................................... 172
REMOVAL ......................................................... 172
INSTALLATION ................................................. 172
Changing Air Cleaner Filter .................................. 173
REMOVAL ......................................................... 173
INSTALLATION ................................................. 173INTAKE MANIFOLD ...............................................174
Removal and Installation ......................................174
REMOVAL .........................................................174
INSPECTION AFTER REMOVAL .....................176
INSTALLATION .................................................176
INSPECTION AFTER INSTALLATION ..............177
EXHAUST MANIFOLD AND THREE WAY CATA-
LYST ........................................................................178
Removal and Installation ......................................178
REMOVAL .........................................................178
INSPECTION AFTER REMOVAL .....................180
INSTALLATION .................................................180
OIL PAN AND OIL STRAINER ...............................181
Removal and Installation ......................................181
REMOVAL .........................................................181
INSPECTION AFTER REMOVAL .....................183
INSTALLATION .................................................183
INSPECTION AFTER INSTALLATION ..............183
IGNITION COIL .......................................................185
Removal and Installation ......................................185
REMOVAL .........................................................185
INSTALLATION .................................................185
SPARK PLUG (PLATINUM-TIPPED TYPE) ...........186
Removal and Installation ......................................186
REMOVAL .........................................................186
INSPECTION AFTER REMOVAL .....................186
INSTALLATION .................................................187
FUEL INJECTOR AND FUEL TUBE ......................188
Removal and Installation ......................................188
REMOVAL .........................................................188
INSTALLATION .................................................190
INSPECTION AFTER INSTALLATION ..............192
ROCKER COVER ...................................................193
Removal and Installation ......................................193
REMOVAL .........................................................193
INSTALLATION .................................................195
TIMING CHAIN ........................................................196
Removal and Installation ......................................196
REMOVAL .........................................................197
INSPECTION AFTER REMOVAL .....................201
INSTALLATION .................................................201
INSPECTION AFTER INSTALLATION ..............207
CAMSHAFT ............................................................208
Removal and Installation ......................................208
REMOVAL .........................................................208
INSPECTION AFTER REMOVAL .....................209
INSTALLATION .................................................212
Valve Clearance ...................................................214
INSPECTION ....................................................214
ADJUSTMENT ..................................................217
OIL SEAL ................................................................221
Removal and Installation of Valve Oil Seal ...........221
REMOVAL .........................................................221
INSTALLATION .................................................221
Removal and Installation of Front Oil Seal ...........222
REMOVAL .........................................................222

EM-4Revision: 2004 November 2004 FX35/FX45INSTALLATION ..................................................222
Removal and Installation of Rear Oil Seal ............223
REMOVAL .........................................................223
INSTALLATION ..................................................223
CYLINDER HEAD ...................................................224
On-Vehicle Service ...............................................224
CHECKING COMPRESSION PRESSURE .......224
Removal and Installation ......................................225
REMOVAL .........................................................225
INSPECTION AFTER REMOVAL ......................226
INSTALLATION ..................................................226
Disassembly and Assembly ..................................228
DISASSEMBLY .................................................228
ASSEMBLY .......................................................229
Inspection After Disassembly ...............................230
VALVE DIMENSIONS ........................................230
VALVE GUIDE CLEARANCE ............................231
VALVE GUIDE REPLACEMENT .......................231
VALVE SEAT CONTACT ...................................232
VALVE SEAT REPLACEMENT .........................233
VALVE SPRING SQUARENESS .......................234
VALVE SPRING DIMENSIONS AND VALVE
SPRING PRESSURE LOAD .............................235
ENGINE ASSEMBLY ..............................................236
Removal and Installation ......................................236
REMOVAL .........................................................236
INSTALLATION ..................................................239
INSPECTION AFTER INSTALLATION ..............239
CYLINDER BLOCK .................................................240
Disassembly and Assembly ..................................240
DISASSEMBLY .................................................241
ASSEMBLY .......................................................244
How to Select Piston and Bearing ........................250
DESCRIPTION ..................................................250
HOW TO SELECT PISTON ...............................250
HOW TO SELECT CONNECTING ROD BEAR-
ING ....................................................................251HOW TO SELECT MAIN BEARING ..................252
Inspection After Disassembly ................................256
CRANKSHAFT END PLAY ................................256
CONNECTING ROD SIDE CLEARANCE .........256
PISTON TO PISTON PIN OIL CLEARANCE .....256
PISTON RING SIDE CLEARANCE ...................257
PISTON RING END GAP ..................................257
CONNECTING ROD BEND AND TORSION .....258
CONNECTING ROD BIG END DIAMETER ......258
CONNECTING ROD BUSHING OIL CLEAR-
ANCE .................................................................258
CYLINDER BLOCK DISTORTION ....................259
MAIN BEARING HOUSING INNER DIAMETER .260
PISTON TO CYLINDER BORE CLEARANCE ..260
CRANKSHAFT MAIN JOURNAL DIAMETER ...261
CRANKSHAFT PIN JOURNAL DIAMETER ......262
CRANKSHAFT OUT-OF-ROUND AND TAPER .262
CRANKSHAFT RUNOUT ..................................262
CONNECTING ROD BEARING OIL CLEAR-
ANCE .................................................................263
MAIN BEARING OIL CLEARANCE ...................264
CRUSH HEIGHT OF MAIN BEARING ..............265
CRUSH HEIGHT OF CONNECTING ROD
BEARING ...........................................................265
DRIVE PLATE ....................................................265
SERVICE DATA AND SPECIFICATIONS (SDS) ....266
Standard and Limit ................................................266
GENERAL SPECIFICATIONS ...........................266
DRIVE BELTS ....................................................266
INTAKE MANIFOLD AND EXHAUST MANI-
FOLD .................................................................266
SPARK PLUG ....................................................267
CAMSHAFT AND CAMSHAFT BEARING .........267
CYLINDER HEAD ..............................................269
CYLINDER BLOCK ............................................272
PISTON, PISTON RING AND PISTON PIN ......273
CONNECTING ROD ..........................................274
CRANKSHAFT ...................................................275
MAIN BEARING .................................................277
CONNECTING ROD BEARING .........................278

PRECAUTIONS
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Revision: 2004 November 2004 FX35/FX45
[VQ35DE]PRECAUTIONSPFP:00001
Precautions Necessary for Steering Wheel Rotation After Battery DisconnectABS00B3I
NOTE:

This Procedure is applied only to models with Intelligent Key system and NVIS/IVIS (NISSAN/INFINITI
VEHICLE IMMOBILIZER SYSTEM - NATS).

Remove and install all control units after disconnecting both battery cables with the ignition knob in the
″LOCK″ position.

Always use CONSULT-II to perform self-diagnosis as a part of each function inspection after finishing
work. If DTC is detected, perform trouble diagnosis according to self-diagnostic results.
For models equipped with the Intelligent Key system and NVIS/IVIS, an electrically controlled steering lock
mechanism is adopted on the key cylinder.
For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and
steering wheel rotation will become impossible.
If steering wheel rotation is required when battery power is interrupted, follow the procedure below before
starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables.
NOTE:
Supply power using jumper cables if battery is discharged.
2. Use the Intelligent Key or mechanical key to turn the ignition switch to the ″ACC″ position. At this time, the
steering lock will be released.
3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be
rotated.
4. Perform the necessary repair operation.
5. When the repair work is completed, return the ignition switch to the ″LOCK″ position before connecting
the battery cables. (At this time, the steering lock mechanism will engage.)
6. Perform a self-diagnosis check of all control units using CONSULT-II.
Precautions for Drain Engine CoolantABS005ZK
Drain engine coolant when engine is cooled.
Precautions for Disconnecting Fuel PipingABS005ZL

Before starting work, make sure no fire or spark producing items are in the work area.

Release fuel pressure before disconnecting and disassembly.

After disconnecting pipes, plug openings to stop fuel leakage.
Precautions for Removal and DisassemblyABS005ZM

When instructed to use special service tools, use the specified tools. Always be careful to work safely,
avoid forceful or uninstructed operations.

Exercise maximum care to avoid damage to mating or sliding surfaces.

Cover openings of engine system with tape or the equivalent, if necessary, to seal out foreign materials.

Mark and arrange disassembly parts in an organized way for easy troubleshooting and re-assembly.

When loosening nuts and bolts, as a basic rule, start with the one furthest outside, then the one diagonally
opposite, and so on. If the order of loosening is specified, do exactly as specified. Power tools may be
used where noted in the step.
Precautions for Inspection, Repair and ReplacementABS005ZN
Before repairing or replacing, thoroughly inspect parts. Inspect new replacement parts in the same way, and
replace if necessary.
Precautions for Assembly and InstallationABS005ZO

Use torque wrench to tighten bolts or nuts to specification.

EM-6
[VQ35DE]
PRECAUTIONS
Revision: 2004 November 2004 FX35/FX45

When tightening nuts and bolts, as a basic rule, equally tighten in several different steps starting with the
ones in center, then ones on inside and outside diagonally in this order. If the order of tightening is speci-
fied, do exactly as specified.

Replace with new liquid gasket, packing, oil seal or O-ring.

Thoroughly wash, clean, and air-blow each part. Carefully check engine oil or engine coolant passages for
any restriction and blockage.

Avoid damaging sliding or mating surfaces. Completely remove foreign materials such as cloth lint or dust.
Before assembly, oil sliding surfaces well.

Release air within route when refilling after draining engine coolant.

Before starting engine, apply fuel pressure to fuel lines with turning ignition switch “ON” (with engine
stopped). Then make sure that there are no leaks at fuel line connections.

After repairing, start engine and increase engine speed to check engine coolant, fuel, engine oil and
exhaust systems for leakage.
Parts Requiring Angle TighteningABS005ZP

Use an angle wrench [SST: KV10112100 (BT8653-A)] for the final tightening of the following engine parts:
–Cylinder head bolts
–Main bearing cap bolts
–Connecting rod cap bolts
–Crankshaft pulley bolt (No angle wrench is required as the bolt flange is provided with notches for angle
tightening)

Do not use a torque value for final tightening.

The torque value for these parts are for a preliminary step.

Ensure thread and seat surfaces are clean and coated with engine oil.
Precautions for Liquid GasketABS005ZQ
REMOVAL OF LIQUID GASKET SEALING

After removing mounting bolts and nuts, separate the mating
surface using a seal cutter (SST) and remove old liquid gasket
sealing.
CAUTION:
Be careful not to damage the mating surfaces.

Tap seal cutter to insert it, and then slide it by tapping on the
side as shown in the figure.

In areas where seal cutter is difficult to use, use plastic hammer
to lightly tap the areas where the liquid gasket is applied.
CAUTION:
If for some unavoidable reason tool such as screwdriver is
used, be careful not to damage the mating surfaces.
LIQUID GASKET APPLICATION PROCEDURE
1. Using a scraper, remove old liquid gasket adhering to liquid gas-
ket application surface and the mating surface.

Remove liquid gasket completely from the groove of the liquid
gasket application surface, mounting bolts, and bolt holes.
2. Wipe liquid gasket application surface and the mating surface
with white gasoline (lighting and heating use) to remove adher-
ing moisture, grease and foreign materials.
PBIC0002E
PBIC0003E

EM-8
[VQ35DE]
PREPARATION
Revision: 2004 November 2004 FX35/FX45
PREPARATIONPFP:00002
Special Service ToolsABS004TT
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number
(Kent-Moore No.)
Tool nameDescription
ST0501S000
(—)
Engine stand assembly
1. ST05011000
(—)
Engine stand
2. ST05012000
(—)
BaseDisassembling and assembling
KV10106500
(—)
Engine stand shaft
KV10117000
(J-41262)
Engine sub-attachmentKV10117000 has been replaced with
KV10117001 (KV10117000 is no longer in
production, but it is usable).
KV10117001
(—)
Engine sub-attachmentInstalling on cylinder block
KV10116200
(J-26336-A)
Valve spring compressor
1. KV10115900
(J-26336-20)
Attachment
2. KV10109220
(—)
AdapterDisassembling valve mechanism
Part (1) is a component of KV10116200
(J-26336-A), but Part (2) is not so.
KV10107902
(J-38959)
Valve oil seal puller
1. KV10116100
(—)
Valve oil seal puller adapterReplacing valve oil seal
NT042
NT028
NT373
NT372
PBIC1650E
S-NT605

PREPARATION
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Revision: 2004 November 2004 FX35/FX45(J-39386)
Valve oil seal driftInstalling valve oil seal
EM03470000
(J-8037)
Piston ring compressorInstalling piston assembly into cylinder bore
ST16610001
(J-23907)
Pilot bushing pullerRemoving crankshaft pilot converter
KV10111100
(J-37228)
Seal cutterRemoving steel oil pan (lower and upper) and
front and rear timing chain case
WS39930000
(—)
Tube presserPressing tube of liquid gasket
KV10112100
(BT8653-A)
Angle wrenchTightening bolts for bearing cap, cylinder
head, etc. in angle
KV10117100
(J-3647-A)
Heated oxygen sensor wrenchLoosening or tightening heated oxygen
sensor 2
For 22 mm (0.87 in) width hexagon nut Tool number
(Kent-Moore No.)
Tool nameDescription
NT024
NT044
NT045
NT046
NT052
NT014
NT379

PREPARATION
EM-11
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Revision: 2004 November 2004 FX35/FX45
(BT3373-F)
Belt tension gaugeChecking drive belt tension
(J-24239-01)
Cylinder head bolt wrenchLoosening 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)
Spark plug wrench Removing and installing spark plug
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 & Exhaust
a: 9.5 mm (0.374 in) dia.
b: 5.5 mm (0.217 in) dia.
Valve guide reamer Reaming valve guide with (1) or hole for
oversize valve guide with (2)
Intake & Exhaust
d
1 : 6.0 mm (0.236 in) dia.
d
2: 10.2 mm (0.402 in) dia. (Kent-Moore No.)
Tool nameDescription
AMA126
NT583
NT047
NT048
NT030
NT015
NT016