coolant INFINITI M35 2006 Factory Service Manual

DTC P1217 ENGINE OVER TEMPERATURE
EC-1241
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WITH CONSULT-II
1. Check the coolant level in the reservoir tank and radiator.
Allow engine to cool before checking coolant level.
If the coolant level in the reservoir tank and/or radiator is below
the proper range, skip the following steps and go to EC-1244,
"Diagnostic Procedure" .
2. Confirm whether customer filled the coolant or not. If customer
filled the coolant, skip the following steps and go to EC-1244,
"Diagnostic Procedure" .
3. Turn ignition switch ON.
4. Perform “FAN DUTY CONTROL” in “ACTIVE TEST” mode with
CONSULT-II.
5. Make sure that cooling fan speed varies according to the per-
cent.
6. If the results are NG, go to EC-1244, "
Diagnostic Procedure" .
WITH GST
1. Check the coolant level in the reservoir tank and radiator.
Allow engine to cool before checking coolant level.
If the coolant level in the reservoir tank and/or radiator is below
the proper range, skip the following steps and go to EC-1244,
"Diagnostic Procedure" .
2. Confirm whether customer filled the coolant or not. If customer
filled the coolant, skip the following steps and go to EC-1244,
"Diagnostic Procedure" .
3. Perform IPDM E/R auto active test and check cooling fan motors
operation, refer to PG-24, "
Auto Active Test" .
4. If NG, go to EC-1244, "
Diagnostic Procedure" .
SEF621W
PBIB2737E
SEF621W

DTC P1217 ENGINE OVER TEMPERATURE
EC-1245
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Revision: 2006 January2006 M35/M45
4. CHECK THERMOSTAT
Check the following.
Thermostat. (Refer to CO-55, "THERMOSTAT AND WATER CONTROL VALVE" .)
Water control valve. (Refer to CO-55, "THERMOSTAT AND WATER CONTROL VALVE" .)
Engine coolant temperature sensor. (Refer to EC-953, "Component Inspection" .)
OK or NG
OK >> GO TO 5.
NG >> Replace malfunctioning component.
5. CHECK MAIN 13 CAUSES
If the cause cannot be isolated, go to EC-1249, "
Main 13 Causes of Overheating" .
>>INSPECTION END
6. CHECK COOLING FAN CONTROL MODULE POWER SUPPLY CIRCUIT-I
1. Turn ignition switch OFF.
2. Disconnect cooling fan control module (1) harness connector
E42.
–: Vehicle front
–Cooling fan motor-1 harness connector (2)
–Cooling fan motor-2 harness connector (3)
3. Turn ignition switch ON.
4. Check voltage between cooling fan control module terminal 3
and ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 7.
NG >> GO TO 15.
7. CHECK COOLING FAN CONTROL MODULE GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check harness continuity between cooling fan control module terminal 1 and ground.
Refer to wiring diagram.
3. Also check harness for short to power.
OK or NG
OK >> GO TO 8.
NG >> Repair open circuit or short to power in harness or connectors.
PBIB2691E
Voltage: Battery voltage
PBIA9509J
Continuity should exist.

DTC P1217 ENGINE OVER TEMPERATURE
EC-1249
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Revision: 2006 January2006 M35/M45
19. CHECK INTERMITTENT INCIDENT
Perform EC-878, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
OK or NG
OK >> Replace IPDM E/R. Refer to PG-18, "IPDM E/R (INTELLIGENT POWER DISTRIBUTION MOD-
ULE ENGINE ROOM)" .
NG >> Repair or replace harness connectors.
Main 13 Causes of OverheatingNBS005KW
*1: Turn the ignition switch ON.
*2: Engine running at 3,000 rpm for 10 minutes.
*3: Drive at 90 km/h (55 MPH) for 30 minutes and then let idle for 10 minutes.
*4: After 60 minutes of cool down time.
For more information, refer to CO-36, "
OVERHEATING CAUSE ANALYSIS" .
Component InspectionNBS005KX
COOLING FAN MOTORS -1 AND -2
Models With Sub Harneess
1. Disconnect cooling fan motor harness connector.
Engine Step Inspection item Equipment Standard Reference page
OFF 1
Blocked radiator
Blocked condenser
Blocked radiator grille
Blocked bumper
Visual No blocking —
2
Coolant mixtureCoolant tester 50 - 50% coolant mixtureMA-13
3Coolant levelVisual Coolant up to MAX level
in reservoir tank and radi-
ator filler neckCO-40
4Radiator capPressure tester 59 - 98 kPa
(0.6 - 1.0 kg/cm2 , 9 - 14
psi) (Limit)CO-45
ON*25Coolant leaksVisual No leaksCO-40
ON*26ThermostatTouch the upper and
lower radiator hosesBoth hoses should be hotCO-55
ON*17Cooling fanCONSULT-II Operating See trouble diagnosis for
DTC P1217 (EC-1239
).
OFF 8
Combustion gas leakColor checker chemical
tester 4 Gas analyzerNegative —
ON*
39Coolant temperature
gaugeVisual Gauge less than 3/4
when driving—
Coolant overflow to
reservoir tankVisual No overflow during driving
and idlingCO-40
OFF*410Coolant return from
reservoir tank to radia-
torVisual Should be initial level in
reservoir tankCO-40
OFF 11Water control valveRemove and inspect
the valveWithin the specified valueCO-55
OFF 12Cylinder headStraight gauge feeler
gauge0.1 mm (0.004 in) Maxi-
mum distortion (warping)EM-233
13Cylinder block and pis-
tonsVisual No scuffing on cylinder
walls or pistonEM-249

DTC P1220 FUEL PUMP CONTROL MODULE (FPCM)
EC-1251
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DTC P1220 FUEL PUMP CONTROL MODULE (FPCM)PFP:17001
DescriptionNBS005KY
SYSTEM DESCRIPTION
*: ECM determines the start signal status by the signals of engine speed and battery voltage.
This system controls the fuel pump operation. The amount of fuel flow delivered from the fuel pump is altered
between two flow rates by the FPCM operation. The FPCM determines the voltage supplied to the fuel pump
(and therefore fuel flow) according to the following conditions.
COMPONENT DESCRIPTION
The FPCM adjusts the voltage supplied to the fuel pump to control
the amount of fuel flow. When the FPCM increases the voltage sup-
plied to the fuel pump, the fuel flow is increased. When the FPCM
decreases the voltage, the fuel flow is decreased.
CONSULT-II Reference Value in Data Monitor ModeNBS005KZ
Specification data are reference values.
On Board Diagnosis LogicNBS005L0
Sensor Input Signal to ECM ECM function Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)Engine speed*
Fuel pump controlFuel pump control module
(FPCM) Mass air flow sensor Amount of intake air
Engine coolant temperature sensor Engine coolant temperature
Battery Battery voltage*
Conditions Amount of fuel flow Supplied voltage
Engine cranking
Engine coolant temperature is below 10C (50F).
Engine is running under heavy load and high speed conditionshighBattery voltage
(11 - 14V)
Except the above low Approximately 8V
SEF387X
MONITOR ITEM CONDITION SPECIFICATION
FPCM
Engine: Cranking HI
Engine: Idle
Engine coolant temperature: More than 10C (50F)LOW
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1220
1220Fuel pump control module
(FPCM)An improper voltage signal from the FPCM, which
is supplied to a point between the fuel pump and
the dropping resistor, is detected by ECM.
Harness or connectors
(FPCM circuit is shorted.)
Dropping resistor
FPCM

EC-1398
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VARIABLE INDUCTION AIR CONTROL SYSTEM (VIAS)
Revision: 2006 January2006 M35/M45
VARIABLE INDUCTION AIR CONTROL SYSTEM (VIAS)PFP:14956
DescriptionNBS005PK
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
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)Engine speed*
VIAS control VIAS control solenoid valve Mass air flow sensor Amount of intake air
Throttle position sensor Throttle position
Accelerator pedal position sensor Accelerator pedal position
Battery Battery voltage*
Engine coolant temperature sensor Engine coolant temperature
PBIB1876E

SERVICE DATA AND SPECIFICATIONS (SDS)
EC-1461
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SERVICE DATA AND SPECIFICATIONS (SDS)PFP:00030
Fuel PressureNBS005QT
Idle Speed and Ignition TimingNBS005QU
*: Under the following conditions:
Air conditioner switch: OFF
Electric load: OFF (Lights, heater fan & rear window defogger)
Steering wheel: Kept in straight-ahead position
Calculated Load ValueNBS005QV
Mass Air Flow SensorNBS005QW
*: Engine is warmed up to normal operating temperature and running under no load.
Intake Air Temperature SensorNBS005QX
Engine Coolant Temperature SensorNBS005QY
Fuel Tank Temperature SensorNBS005QZ
Crankshaft Position Sensor (POS)NBS005R0
Refer to EC-1105, "Component Inspection" .
Camshaft Position Sensor (PHASE)NBS005R1
Refer to EC-1112, "Component Inspection" .
A/F Sensor 1 HeaterNBS005R2
Fuel pressure at idling kPa (kg/cm2 , psi)Approximately 350 (3.57, 51)
Target idle speed No load* (in P or N position) 65050 rpm
Air conditioner: ON In P or N position 650 rpm or more
Ignition timing In P or N position 12
5 BTDC
Condition Calculated load value% (Using CONSULT-II or GST)
At idle14 - 33
At 2,500 rpm12 - 25
Supply voltageBattery voltage (11 - 14V)
Output voltage at idle0.9 - 1.2V*
Mass air flow (Using CONSULT-II or GST)2.0 - 6.0 gꞏm/sec at idle*
7.0 - 20.0 gꞏm/sec at 2,500 rpm*
Temperature C (F) Resistance k
25 (77)1.800 - 2.200
Temperature C (F) Resistance k
20 (68)2.1 - 2.9
50 (122)0.68 - 1.00
90 (194)0.236 - 0.260
Temperature C (F) Resistance k
20 (68)2.3 - 2.7
50 (122)0.79 - 0.90
Resistance [at 25C (77F)] 2.3 - 4.3

EM-1
ENGINE MECHANICAL
B ENGINE
CONTENTS
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SECTION EM
A
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ENGINE MECHANICAL
VQ35DE
PRECAUTIONS .......................................................... 5
Precautions for Procedures without Cowl Top Cover ..... 5
Precautions Necessary for Steering Wheel Rotation
After Battery Disconnect .......................................... 5
OPERATION PROCEDURE ................................. 5
Precautions for Drain Engine Coolant and Engine
Oil ............................................................................. 5
Precautions for Disconnecting Fuel Piping .............. 5
Precautions for Removal and Disassembly ............. 5
Precautions for Inspection, Repair and Replace-
ment ......................................................................... 6
Precautions for Assembly and Installation ............... 6
Precautions for Angle Tightening ............................. 6
Precautions for Liquid Gasket .................................. 6
REMOVAL OF LIQUID GASKET SEALING .......... 6
LIQUID GASKET APPLICATION PROCEDURE ..... 7
PREPARATION ........................................................... 8
Special Service Tools ............................................... 8
Commercial Service Tools ...................................... 10
NOISE, VIBRATION AND HARSHNESS (NVH)
TROUBLESHOOTING .............................................. 12
NVH Troubleshooting — Engine Noise .................. 12
Use the Chart Below to Help You Find the Cause
of the Symptom. ..................................................... 13
ENGINE ROOM COVER .......................................... 14
Components ........................................................... 14
Removal and Installation ........................................ 14
REMOVAL ........................................................
... 14
INSTALLATION ................................................... 14
DRIVE BELTS ........................................................... 15
Checking Drive Belts .............................................. 15
Tension Adjustment ................................................ 15
ALTERNATOR AND POWER STEERING OIL
PUMP BELT ........................................................ 16
A/C COMPRESSOR BELT ................................. 16
Removal and Installation ........................................ 16
REMOVAL ........................................................
... 16
INSTALLATION ................................................... 16AIR CLEANER AND AIR DUCT ............................... 17
Components ........................................................... 17
Removal and Installation ........................................ 17
REMOVAL ........................................................
... 17
INSTALLATION ................................................... 17
Changing Air Cleaner Filter .................................... 18
REMOVAL ........................................................
... 18
INSTALLATION ................................................... 18
INTAKE MANIFOLD COLLECTOR .......................... 19
Components ........................................................... 19
Removal and Installation ........................................ 19
REMOVAL ........................................................
... 19
INSPECTION AFTER REMOVAL ....................... 21
INSTALLATION ................................................... 22
INTAKE MANIFOLD ................................................. 24
Components ........................................................... 24
Removal and Installation ........................................ 24
REMOVAL ........................................................
... 24
INSPECTION AFTER REMOVAL ....................... 25
INSTALLATION ................................................... 25
EXHAUST MANIFOLD ............................................. 26
Components ........................................................... 26
Removal and Installation ........................................ 26
REMOVAL ........................................................
... 26
INSPECTION AFTER REMOVAL ....................... 27
INSTALLATION ................................................... 27
OIL PAN AND OIL STRAINER ................................. 29
Components (2WD Models) ................................... 29
Removal and Installation (2WD Models) ................ 29
REMOVAL ........................................................
... 29
INSPECTION AFTER REMOVAL ....................... 31
INSTALLATION ................................................... 31
INSPECTION AFTER INSTALLATION ................ 34
Components (AWD Models) ................................... 35
Removal and Installation (AWD Models) ................ 36
REMOVAL ........................................................
... 36
INSPECTION AFTER REMOVAL ....................... 38
INSTALLATION ................................................... 38
INSPECTION AFTER INSTALLATION ................ 41

EM-3
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EMA
Revision: 2006 January2006 M35/M45 ANCE ................................................................146
MAIN BEARING OIL CLEARANCE ..................147
MAIN BEARING CRUSH HEIGHT ....................148
CONNECTING ROD BEARING CRUSH
HEIGHT .............................................................148
MAIN BEARING CAP BOLT OUTER DIAMETER .148
CONNECTING ROD BOLT OUTER DIAMETER .149
DRIVE PLATE ...................................................149
OIL JET .............................................................149
OIL JET RELIEF VALVE ...................................149
SERVICE DATA AND SPECIFICATIONS (SDS) ....150
Standard and Limit ...............................................150
GENERAL SPECIFICATIONS ..........................150
DRIVE BELT .....................................................151
INTAKE MANIFOLD COLLECTOR, INTAKE
MANIFOLD AND EXHAUST MANIFOLD .........151
SPARK PLUG ...................................................151
CAMSHAFT AND CAMSHAFT BEARING ........152
CYLINDER HEAD .............................................154
CYLINDER BLOCK ...........................................157
PISTON, PISTON RING AND PISTON PIN ......158
CONNECTING ROD .........................................159
CRANKSHAFT ..................................................160
MAIN BEARING ................................................161
CONNECTING ROD BEARING ........................162
VK45DE
PRECAUTIONS ......................................................163
Precautions for Procedures without Cowl Top Cover .163
Precautions Necessary for Steering Wheel Rotation
After Battery Disconnect ......................................163
OPERATION PROCEDURE .............................163
Precautions for Drain Engine Coolant and Engine
Oil .........................................................................163
Precautions for Disconnecting Fuel Piping ..........163
Precautions for Removal and Disassembly .........163
Precautions for Inspection, Repair and Replace-
ment .....................................................................164
Precautions for Assembly and Installation ...........164
Parts Requiring Angle Tightening .........................164
Precautions for Liquid Gasket ..............................164
REMOVAL OF LIQUID GASKET SEALING ......164
LIQUID GASKET APPLICATION PROCEDURE .165
PREPARATION .......................................................166
Special Service Tools ...........................................166
Commercial Service Tools ....................................169
NOISE, VIBRATION AND HARSHNESS (NVH)
TROUBLESHOOTING ............................................171
NVH Troubleshooting — Engine Noise ................171
Use the Chart Below to Help You Find the Cause
of the Symptom. ...................................................172
ENGINE ROOM COVER ........................................173
Components .........................................................173
Removal and Installation ......................................173
REMOVAL ........................................................
.173
INSTALLATION .................................................173DRIVE BELTS .........................................................174
Components .........................................................174
Checking Drive Belts ............................................174
Tension Adjustment .............................................
.174
Removal and Installation ......................................174
REMOVAL ........................................................
.174
INSTALLATION .................................................175
Components .........................................................176
Drive Belt Auto Tensioner and Idler Pulley ...........176
REMOVAL ........................................................
.176
INSTALLATION .................................................176
AIR CLEANER AND AIR DUCT .............................177
Components .........................................................177
Removal and Installation ......................................177
REMOVAL ........................................................
.177
INSPECTION AFTER REMOVAL .....................178
INSTALLATION .................................................178
Changing Air Cleaner Filter ..................................178
REMOVAL ........................................................
.178
INSTALLATION .................................................178
INTAKE MANIFOLD ..............................................
.179
Components .........................................................179
Removal and Installation ......................................180
REMOVAL ........................................................
.180
INSPECTION AFTER REMOVAL .....................182
INSTALLATION .................................................182
INSPECTION AFTER INSTALLATION ..............182
EXHAUST MANIFOLD AND THREE WAY CATA-
LYST ........................................................................183
Components .........................................................183
Removal and Installation ......................................183
REMOVAL ........................................................
.183
INSPECTION AFTER REMOVAL .....................185
INSTALLATION .................................................185
OIL PAN AND OIL STRAINER ...............................187
Components .........................................................187
Removal and Installation ......................................187
REMOVAL ........................................................
.187
INSPECTION AFTER REMOVAL .....................188
INSTALLATION .................................................188
INSPECTION AFTER INSTALLATION ..............189
IGNITION COIL .......................................................190
Components .........................................................190
Removal and Installation ......................................190
REMOVAL ........................................................
.190
INSTALLATION .................................................190
SPARK PLUG (PLATINUM-TIPPED TYPE) ...........191
Components .........................................................191
Removal and Installation ......................................191
REMOVAL ........................................................
.191
INSPECTION AFTER REMOVAL .....................191
INSTALLATION .................................................192
FUEL INJECTOR AND FUEL TUBE ......................193
Components .........................................................193
Removal and Installation ......................................193
REMOVAL ........................................................
.193
INSTALLATION .................................................195
INSPECTION AFTER INSTALLATION ..............197

PRECAUTIONS
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[VQ35DE]PRECAUTIONSPFP:00001
Precautions for Procedures without Cowl Top CoverNBS004MF
When performing the procedure after removing cowl top cover, cover
the lower end of windshield with urethane, etc.
Precautions Necessary for Steering Wheel Rotation After Battery DisconnectNBS005RR
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 Coolant and Engine OilNBS004MH
Drain engine coolant and engine oil when the engine is cooled.
Precautions for Disconnecting Fuel PipingNBS004MI
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 DisassemblyNBS004MJ
When instructed to use SST, use specified tools. Always be careful to work safely, avoid forceful or unin-
structed operations.
Exercise maximum care to avoid damage to mating or sliding surfaces.
PIIB3706J

EM-6
[VQ35DE]
PRECAUTIONS
Revision: 2006 January2006 M35/M45
Dowel pins are used for several parts alignment. When replacing and reassembling parts with dowel pins,
make sure that dowel pins are installed in the original position.
Cover openings of engine system with a tape or 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 in the step.
Precautions for Inspection, Repair and ReplacementNBS004MK
Before repairing or replacing, thoroughly inspect parts. Inspect new replacement parts in the same way, and
replace if necessary.
Precautions for Assembly and InstallationNBS004ML
Use torque wrench to tighten bolts or nuts to specification.
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 gasket, packing, oil seal or O-ring.
Dowel pins are used for several parts alignment.When replacing and reassembling parts with dowel
pins,make sure that dowel pins are installed in the original position.
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.
After repairing, start the engine and increase engine speed to check engine coolant, fuel, engine oil, and
exhaust gases for leakage.
Precautions for Angle TighteningNBS004MM
Use the 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
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 GasketNBS004MN
REMOVAL OF LIQUID GASKET SEALING
After removing mounting nuts and bolts, separate the mating
surface using the seal cutter (SST) and remove old liquid gasket
sealing.
CAUTION:
Be careful not to damage the mating surfaces.
Tap the seal cutter to insert it (1), and then slide it (2) by tapping
on the side as shown in the figure.
In areas where the seal cutter (SST) is difficult to use, use a
plastic hammer to lightly tap the parts, to remove it.
CAUTION:
If for some unavoidable reason tool such as a screwdriver
is used, be careful not to damage the mating surfaces.
PBIC0002E