steering INFINITI FX35 2008 Service Manual

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ENGINE
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CONTENTS
ENGINE MECHANICAL
VQ35DE
SERVICE INFORMATION .. ..........................
4
PRECAUTIONS .............................................. .....4
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect ............................... ......
4
Precaution for Drain Engine Coolant and Engine
Oil ..............................................................................
4
Precaution for Disconnecting Fuel Piping .................4
Precaution for Removal and Disassembly ................4
Precaution for Inspection, Repair and Replace-
ment ..........................................................................
4
Precaution for Assembly and Installation ..................5
Precaution for Angle Tightening ................................5
Precaution for Liquid Gasket .....................................5
PREPARATION ...................................................7
Special Service Tool ........................................... ......7
Commercial Service Tool ..........................................9
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 .......................................................
12
DRIVE BELTS ....................................................14
Checking Drive Belts ........................................... ....14
Tension Adjustment ................................................14
Removal and Installation .........................................15
AIR CLEANER AND AIR DUCT ........................17
Component .......................................................... ....17
Removal and Installation .........................................17
Changing Air Cleaner Filter .....................................18
INTAKE MANIFOLD COLLECTOR ...................19
Component .......................................................... ....19
Removal and Installation .........................................19
INTAKE MANIFOLD ...........................................24
Component .......................................................... ....24
Removal and Installation .........................................24
EXHAUST MANIFOLD AND THREE WAY
CATALYST ........................................................
26
Component ..............................................................26
Removal and Installation .........................................26
OIL PAN AND OIL STRAINER .........................30
Component (2WD Models) ......................................30
Removal and Installation (2WD Models) .................30
Component (AWD Models) ......................................35
Removal and Installation (AWD Models) .................36
IGNITION COIL .................................................42
Component ..............................................................42
Removal and Installation .........................................42
SPARK PLUG (PLATINUM-TIPPED TYPE) .....43
Component ..............................................................43
Removal and Installation .........................................43
FUEL INJECTOR AND FUEL TUBE ................45
Component ..............................................................45
Removal and Installation .........................................45
ROCKER COVER .............................................51
Component ..............................................................51
Removal and Installation .........................................51
FRONT TIMING CHAIN CASE .........................54
Removal and Installation .........................................54
TIMING CHAIN ..................................................64
Component .......................................................... ....64
Removal and Installation .........................................65
CAMSHAFT .......................................................83
Component ..............................................................83
Removal and Installation .........................................84
Valve Clearance ......................................................91
OIL SEAL ..........................................................97
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EM-2
Removal and Installation of Valve Oil Seal .............97
Removal and Installation of Front Oil Seal .............97
Removal and Installation of Rear Oil Seal ..............98
CYLINDER HEAD ............................................100
On-Vehicle Service .............................................. ..100
Component ............................................................101
Removal and Installation .......................................101
Disassembly and Assembly ...................................105
Inspection After Disassembly ................................107
ENGINE ASSEMBLY .......................................112
Component (2WD Models) .................................. ..112
Removal and Installation (2WD Models) ...............112
Component (AWD Models) ....................................117
Removal and Installation (AWD Models) ...............117
CYLINDER BLOCK .........................................122
Component .......................................................... ..122
Disassembly and Assembly ...................................123
How to Select Piston and Bearing .........................134
Inspection After Disassembly ................................138
SERVICE DATA AND SPECIFICATIONS
(SDS) ................................................................
149
Standard and Limit .............................................. ..149
VK45DE
SERVICE INFORMATION ..........................
160
PRECAUTIONS .............................................. .160
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect ............................... ..
160
Precaution for Drain Engine Coolant and Engine
Oil ..........................................................................
160
Precaution for Disconnecting Fuel Piping ..............160
Precaution for Removal and Disassembly .............160
Precaution for Inspection, Repair and Replace-
ment .......................................................................
160
Precaution for Assembly and Installation ..............161
Parts Requiring Angle Tightening ..........................161
Precaution for Liquid Gasket .................................161
PREPARATION .............................................. .163
Special Service Tool ............................................ ..163
Commercial Service Tool ......................................164
NOISE, VIBRATION AND HARSHNESS
(NVH) TROUBLESHOOTING ..........................
167
NVH Troubleshooting - Engine Noise .................. ..167
Use the Chart Below to Help You Find the Cause
of the Symptom .....................................................
167
ENGINE ROOM COVER ..................................169
Component .......................................................... ..169
Removal and Installation .......................................169
DRIVE BELTS ..................................................170
Component .......................................................... ..170
Checking Drive Belts .............................................170
Tension Adjustment ...............................................170
Removal and Installation ...................................... .170
Component ...........................................................171
Drive Belt Auto Tensioner and Idler Pulley ...........172
AIR CLEANER AND AIR DUCT .......................173
Component .......................................................... .173
Removal and Installation .......................................173
Changing Air Cleaner Filter ...................................174
INTAKE MANIFOLD .........................................175
Component .......................................................... .175
Removal and Installation .......................................176
EXHAUST MANIFOLD AND THREE WAY
CATALYST .......................................................
179
Component .......................................................... .179
Removal and Installation .......................................179
OIL PAN AND OIL STRAINER ........................183
Component .......................................................... .183
Removal and Installation .......................................183
IGNITION COIL .................................................187
Component .......................................................... .187
Removal and Installation .......................................187
SPARK PLUG (PLATINUM-TIPPED TYPE) ....188
Component .......................................................... .188
Removal and Installation .......................................188
FUEL INJECTOR AND FUEL TUBE ................190
Component .......................................................... .190
Removal and Installation .......................................190
ROCKER COVER .............................................196
Component .......................................................... .196
Removal and Installation .......................................196
TIMING CHAIN .................................................199
Component .......................................................... .199
Removal and Installation .......................................200
CAMSHAFT ......................................................211
Component .......................................................... .211
Removal and Installation .......................................211
Valve Clearance ....................................................218
OIL SEAL ..........................................................222
Removal and Installation of Valve Oil Seal ...........222
Removal and Installation of Front Oil Seal ........... .222
Removal and Installation of Rear Oil Seal ............224
CYLINDER HEAD .............................................226
On-Vehicle Service .............................................. .226
Component ...........................................................227
Removal and Installation .......................................227
Disassembly and Assembly ..................................229
Inspection After Disassembly ................................232
ENGINE ASSEMBLY ..................................... ..237
Component .......................................................... .237
Removal and Installation .......................................237
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EM-4
< SERVICE INFORMATION >[VQ35DE]
PRECAUTIONS
SERVICE INFORMATION
PRECAUTIONS
Precaution Necessary for Steering W
heel Rotation After Battery Disconnect
INFOID:0000000001524592
NOTE:
• This Procedure is applied only to models with In telligent 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-III 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 pow er 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-III.
Precaution for Drain Engine Coolant and Engine OilINFOID:0000000001325693
Drain engine coolant and engine oil when the engine is cooled.
Precaution for Disconnecting Fuel PipingINFOID:0000000001325694
 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.
Precaution for Removal and DisassemblyINFOID:0000000001325695
 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.
 Cover openings of engine system with a tape or equival ent, if necessary, to seal out foreign materials.
 Mark and arrange disassembly parts in an organi zed way for easy troubleshooting and re-assembly.
 When loosening nuts and bolts, as a basic rule, star t 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.
Precaution for Inspection, Repair and ReplacementINFOID:0000000001325696
Before repairing or replacing, thoroughly inspect parts. Inspect new replacement parts in the same way, and
replace if necessary.
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EM-14
< SERVICE INFORMATION >[VQ35DE]
DRIVE BELTS
DRIVE BELTS
Checking Drive BeltsINFOID:0000000001429496
WARNING:
Be sure to perform when engine is stopped.
1. Inspect belts for cracks, fraying,
wear and oil. If necessary, replace.
2. Inspect drive belt deflection or tension at a point on belt midway between pulleys.
 Inspection should be done only when engine is cold, or over30 minutes after engine is stopped.
 Measure the belt tension with belt tension gauge (Commercial service tool: BT3373-F or equivalent) (A) at points marked
shown in the figure.
 When measuring the deflection, apply 98 N (10 kg, 22 lb) at
the marked point.
 Adjust if the belt deflection exc eeds the limit or if the belt ten-
sion is not within specifications.
CAUTION:
• When checking the belt deflect ion or the tension immedi-
ately after installation, first ad just it to the specified value.
Then, after turning crankshaft two turns or more, re-adjust
to the specified value to avo id variation in deflection
between pulleys.
 Tighten idler pulley lock nut by hand and measure the deflection or the tension without loose-
ness.
Belt Deflection and Tension
*: If belt tension gauge cannot be installed at check points shown, check drive belt tension at different location on belt.
Tension AdjustmentINFOID:0000000001429497
CAUTION:
1 : Power steering oil pump
2: Alternator
3 : Idler pulley
4 : Crankshaft pulley
5: A/C compressor
JPBIA0421ZZ
JPBIA0422ZZ
Items Deflection adjustment Unit: mm (in) Tension adjustment* Unit: N (kg, lb)
Used belt New beltUsed belt
New belt
Limit After adjustment Limit After adjustment
Alternator and
power steering
oil pump belt 12 (0.47)
7 - 8
(0.28 - 0.31) 6 - 7
(0.24 - 0.28) 294 (30, 66) 730 - 818
(74.5 - 83.4, 164 - 184) 838 - 926
(85.5 - 94.5, 188 - 208)
A/C compressor
belt 12 (0.47)9 - 10
(0.35 - 0.39) 8 - 9
(0.31 - 0.35) 196 (20, 44) 348 - 436
(35.5 - 44.5, 78 - 98) 470 - 559
(47.9 - 57.0, 106 - 126)
Applied pushing
force 98 N (10 kg, 22 lb) —
Portion
Belt tightening method for adjustment
Alternator and power steering oil pump belt Adjusting bolt on idler pulley
A/C compressor belt Adjusting bolt on idler pulley
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DRIVE BELTSEM-15
< SERVICE INFORMATION > [VQ35DE]
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 When belt is replaced with a new one, adjust it
to value for “New belt” to accommodate for insuffi-
cient adaptability with pulley grooves.
 When deflection or tension of belt being used exceeds “Limit”, adjust it to value for “After adjust-
ment”.
 When checking belt deflection or tension immediately af ter installation, first adjust it to the specified
value. Then, after turning crankshaft two turns or mo re, re-adjust to the specified value to avoid vari-
ation in deflection between pulleys.
 When installing belt, make sure that it is correctly engaged with pulley grooves.
 Keep engine oil, working fl uid and engine coolant away from belt and pulley grooves.
 Do not twist or bend belt excessively.
ALTERNATOR AND POWER STEERING OIL PUMP BELT
1. Remove front engine undercover with power tool.
2. Loosen idler pulley lock nut (A ) and adjust tension by turning
adjusting bolt (B).
 For the specified belt tension, refer to EM-14, "
Checking Drive
Belts".
3. Tighten nut (A).
A/C COMPRESSOR BELT
1. Remove front engine undercover with power tool.
2. Loosen idler pulley lock nut (C) and adjust tension by turning adjusting bolt (D).  For the specified belt tension, refer to EM-14, "
Checking Drive Belts".
3. Tighten nut (C).
Removal and InstallationINFOID:0000000001429498
REMOVAL
1. Remove front engine undercover with power tool.
2. Remove alternator and power steering oil pump belt. Refer to EM-14, "
Tension Adjustment".
3. Remove A/C compressor belt. Refer to EM-14, "
Tension Adjustment".
CAUTION:
Grease is applied to idler pulley adjusting bol t. Be careful to keep grease away from belt.
INSTALLATION
1. Install belts to pulley in reverse order of removal.
CAUTION:
 Make sure drive belt is correctly engaged with pulley groove.
 Make sure that for engine oil and engine cool ant do not adhere to belt and each pulley grooves.
1 : Alternator and power steering oil pump belt
2 : A/C compressor belt
3 : Power steering oil pump
4 : Idler pulley
5 : Alternator
6 : Crankshaft pulley
7: A/C compressor
: 34.8 N·m (3.5 kg-m, 26 ft-lb)
JPBIA0423ZZ
: 34.8 N·m (3.5 kg-m, 26 ft-lb)
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EM-54
< SERVICE INFORMATION >[VQ35DE]
FRONT TIMING CHAIN CASE
FRONT TIMING CHAIN CASE
Removal and InstallationINFOID:0000000001325728
NOTE:
 This section describes removal/installation procedure
of front timing chain case and timing chain related
parts without removing oil pan (upper) on the vehicle.
 When oil pan (upper) needs to be removed or installed, or when rear timing chain case is removed or installed, remove oil pans (upper and lower) first. Then remove front timing chain case, timing chain related
parts, and rear timing chain case in this order, and install in reverse order of removal. Refer to EM-64, "
Com-
ponent".
 Refer to EM-64, "
Component" for component parts location.
REMOVAL
1. Disconnect negative battery terminal. Refer to SC-4, "How to Handle Battery".
2. Remove engine cover with power tool. Refer to EM-19, "
Component".
3. Remove air cleaner case assembly. Refer to EM-17, "
Component".
4. Remove front and rear engine undercover with power tool.
5. Release the fuel pressure. Refer to EC-87, "
Fuel Pressure Check".
6. Drain engine oil. Refer to LU-7, "
Changing Engine Oil".
CAUTION:
 Perform this step when the engine is cold.
 Do not spill engine oil on drive belts.
7. Drain engine coolant from radiator. Refer to CO-10, "
Changing Engine Coolant".
CAUTION:
 Perform this step when the engine is cold.
 Do not spill engine coolant on drive belts.
8. Separate engine harnesses removing their brackets from front timing chain case.
9. Remove drive belts. Refer to EM-15, "
Removal and Installation".
10. Remove intake manifold colle ctors (upper and lower). Refer to EM-19, "
Component".
11. Remove power steering oil pump from bracket with piping connected, and temporarily secure it aside.
Refer to PS-27, "
On-Vehicle Inspection and Service".
12. Remove power steering oil pump bracket. Refer to PS-27, "
On-Vehicle Inspection and Service".
13. Remove alternator. Refer to SC-19, "
System Description".
14. Remove water bypass hose, water hose clamp and idler pulley bracket from front timing chain case.
15. Remove intake valve timing control covers.  Loosen mounting bolts in reverse order as shown in the figure.
 Use the seal cutter [SST: KV10111100 (J37228)] to cut liquidgasket for removal.
CAUTION:
Shaft is internally jointed wi th camshaft sprocket (INT) cen-
ter hole. When removing, keep it horizontal until it is com-
pletely disconnected.
SEM728G
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FRONT TIMING CHAIN CASEEM-63
< SERVICE INFORMATION > [VQ35DE]
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 After cooling down engine, again check oil/fluid levels including engine oil and engine coolant. Refill to the
specified level, if necessary.
Summary of the inspection items:
*: Transmission/transaxle/CVT fluid. power steering fluid, brake fluid, etc. Items Before starting engine Engine running After engine stopped
Engine coolant Level Leakage Level
Engine oil Level Leakage Level
Other oils and fluid* Level Leakage Level
Fuel Leakage Leakage Leakage
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TIMING CHAINEM-65
< SERVICE INFORMATION > [VQ35DE]
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Removal and InstallationINFOID:0000000001325730
NOTE:
 This section describes procedures for removing/installing front timing chain case and timing chain related
parts, and rear timing chain case, when oil pan (upper) needs to be removed/installed for engine overhaul,
etc.
 To remove/install front timing chain case, timing chain, and its related parts without removing oil pan (upper),
refer to EM-54, "
Removal and Installation".
REMOVAL
1. Remove front tire.
2. Disconnect negative battery terminal.
3. Remove engine cover with power tool. Refer to EM-19, "
Component".
4. Remove air cleaner case assembly. Refer to EM-17, "
Component".
5. Remove front and rear engine undercover with power tool.
6. Release the fuel pressure. Refer to EC-87, "
Fuel Pressure Check".
7. Drain engine coolant from radiator. Refer to CO-10, "
Changing Engine Coolant".
CAUTION:
 Perform this step when the engine is cold.
 Do not spill engine coolant on drive belts.
8. Drain engine oil. Refer to LU-7, "
Changing Engine Oil".
CAUTION:
 Perform this step when the engine is cold.
 Do not spill engine oil on drive belts.
9. Remove engine harnesses.
10. Remove intake manifold collectors (upper and lower). Refer to EM-19, "
Component".
11. Remove radiator cooling fan assembly. Refer to CO-20, "
Component".
12. Remove drive belts. Refer to EM-15, "
Removal and Installation".
13. Remove A/C compressor from bracket with piping c onnected, and temporarily secure it aside. Refer to
ATC-121, "
Component".
14. Remove power steering oil pump from bracket with piping connected, and temporarily secure it aside.
Refer to PS-27, "
On-Vehicle Inspection and Service".
15. Remove power steering oil pump bracket. Refer to PS-27, "
On-Vehicle Inspection and Service".
16. Remove alternator. Refer to SC-19, "
System Description".
17. Remove water bypass hose, water hose clamp and id ler pulley bracket from front timing chain case.
18. Remove intake valve timing control covers.
10. Camshaft sprocket (INT) 11. Slack guide 12. Crankshaft sprocket
13. Timing chain tensioner (primary) 14. Intake valve timing control cover 15. Collared O-ring
16. O-ring 17. Chain tensioner cover 18. Intake valve timing control cover
19. Water hose clamp 20. Spacer 21. Idler pulley
22. Crankshaft pulley 23. Front oil seal 24. Idler pulley
25. A/C compressor bracket 26. Water pump cover 27. Bracket
28. Front timing chain case 29. Bracket 30. Rear timing chain case
31. O-ring 32. Tension guide 33. Water drain plug (front side)
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EM-82
< SERVICE INFORMATION >[VQ35DE]
TIMING CHAIN
e. Further tighten by 90 degrees. (Angle tightening)
 Check the tightening angle by referencing to the notches. Theangle between two notches is 90 degrees.
19. Rotate crankshaft pulley in normal direction (clock wise when viewed from front) to confirm it turns
smoothly.
20. For the following operations, perform steps in the reverse order of removal.
INSPECTION AFTER INSTALLATION
Inspection for Leaks
The following are procedures for checking fluids leak, lubricates leak. Before starting engine, check oil/fluid levels incl uding engine coolant and engine oil. If less than required
quantity, fill to the specified level. Refer to GI-44, "
Recommended Chemical Product and Sealant".
 Use procedure below to check for fuel leakage.
- Turn ignition switch “ON” (with engine stopped). With fuel pressure applied to fuel piping, check for fuel leak-
age at connection points.
- Start engine. With engine speed increased, che ck again for fuel leakage at connection points.
 Run engine to check for unusual noise and vibration. NOTE:
If hydraulic pressure inside chain tensioner drops af ter removal/installation, slack in guide may generate a
pounding noise during and just after the engine start. However, this does not indicate an unusualness. Noise
will stop after hydraulic pressure rises.
 Warm up engine thoroughly to make sure there is no leakage of fuel, or any oil/fluids including engine oil and engine coolant.
 Bleed air from lines and hoses of applic able lines, such as in cooling system.
 After cooling down engine, again check oil/fluid levels including engine oil and engine coolant. Refill to the specified level, if necessary.
Summary of the inspection items:
*: Transmission/transaxle/CVT fluid. power steering fluid, brake fluid, etc.
PBIC4821E
Items Before starting engine Engine running After engine stopped
Engine coolant Level Leakage Level
Engine oil Level Leakage Level
Other oils and fluid* Level Leakage Level
Fuel Leakage Leakage Leakage
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CAMSHAFTEM-91
< SERVICE INFORMATION > [VQ35DE]
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4. Crank the engine, and then make sure that engine oil comes out
from camshaft bracket (No. 1) oil hole. End crank after checking.
WARNING:
Be careful not to touch rotating parts (drive belts, idler pul-
ley, and crankshaft pulley, etc.).
CAUTION:
Engine oil may squirt from in take valve timing control sole-
noid valve installation hole during cranking. Use a shop
cloth to prevent the engine components and the vehicle. Do
not allow engine oil to get on rubber components such as
drive belt or engine mount insulators. Immediately wipe off
any splashed engine oil.
 Clean oil groove between oil strainer and intake valve timing control solenoid valve if engine oil does not come out from camshaft bracket (No. 1) oil hole. Refer to LU-4, "
Lubrication Circuit".
5. Remove components between intake valve timing control solenoid valve and camshaft sprocket (INT), and then check each oil groove for clogging.
 Clean oil groove if necessary. Refer to LU-4, "
Lubrication Circuit".
6. After inspection, install removed parts.
Inspection for Leaks
The following are procedures for chec king fluids leak, lubricates leak.
 Before starting engine, check oil/fluid levels incl uding engine coolant and engine oil. If less than required
quantity, fill to the specified level. Refer to MA-9, "
Fluids and Lubricants".
 Use procedure below to check for fuel leakage.
- Turn ignition switch “ON” (with engine stopped). With fuel pressure applied to fuel piping, check for fuel leak-
age at connection points.
- Start engine. With engine speed increased, check again for fuel leakage at connection points.
 Run engine to check for unusual noise and vibration.
NOTE:
If hydraulic pressure inside timing chain tensioner drops after removal/installation, slack in the guide may
generate a pounding noise during and just after engine start. However, this is normal. Noise will stop after
hydraulic pressure rises.
 Warm up engine thoroughly to make sure there is no leak age of fuel, or any oil/fluids including engine oil and
engine coolant.
 Bleed air from lines and hoses of applicable lines, such as in cooling system.
 After cooling down engine, again check oil/fluid levels including engine oil and engine coolant. Refill to the specified level, if necessary.
Summary of the inspection items:
* Transmission/transaxle/CVT fluid. power steering fluid, brake fluid, etc.
Valve ClearanceINFOID:0000000001325733
INSPECTION
Perform inspection as follows after removal, installation or replacement of camshaft or valve-related parts, or if
there is unusual engine conditions regarding valve clearance.
PBIC2869E
Items Before starting engine Engine running After engine stopped
Engine coolant Level Leakage Level
Engine oil Level Leakage Level
Other oils and fluid* Level Leakage Level
Fuel Leakage Leakage Leakage
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C