intake INFINITI FX35 2008 Service Manual

CYLINDER HEADEM-107
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8. Install valve collet.
 Compress valve spring with the valve spring compressor, theattachment and the adapter (SST). Install valve collet with a
magnet hand.
CAUTION:
When working, take care not to damage valve lifter holes.
 Tap valve stem edge lightly with plastic hammer after installa- tion to check its installed condition.
9. Install valve lifter.  Install it in the original position.
10. Install spark plug tube.  Press-fit spark plug tube as follows:
a. Remove old liquid gasket adhering to cylinder head mounting hole.
b. Apply sealant to area within approximately 12 mm (0.47 in) from edge of spark plug tube press-fit side.
Use Genuine High Strength Locking Sealant or equivalent. Refer to GI-44
.
c. Using drift, press-fit spark plug tube so that its height “H” is as specified in the figure.
CAUTION:
 When press-fitting, take care not to deform spark plugtube.
 After press-fitting, wipe o ff liquid gasket protruding onto
cylinder-head upper face.
11. Install spark plug with spark plug wrench (commercial service tool).
Inspection After DisassemblyINFOID:0000000001325741
VALVE DIMENSIONS
 Check the dimensions of each valv e. For the dimensions, refer to EM-149, "Standard and Limit".
 If dimensions are out of the standard, replace valve and check valve seat contact. Refer to "VALVE SEAT
CONTACT".
VALVE GUIDE CLEARANCE
Valve Stem Diameter
Measure the diameter of va lve stem with micrometer.
Valve Guide Inner Diameter
Measure the inner diameter of valve guide with an inside micrometer.
PBIC1803E
Standard press-fit height “H”:
: 38.1 - 39.1 mm (1.500 - 1.539 in)
PBIC2638E
StandardIntake : 5.965 - 5.980 mm (0.2348 - 0.2354 in)
Exhaust : 5.955 - 5.970 mm (0.2344 - 0.2350 in)
SEM938C
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EM-108
< SERVICE INFORMATION >[VQ35DE]
CYLINDER HEAD
Valve Guide Clearance
(Valve guide clearance) = (Valve guide inner diameter) – (Valve stem diameter)
 If the calculated value exceeds the limit, replace valve and/or valve guide When valve guide must be
replaced, refer to "VALVE GUIDE REPLACEMENT".
VALVE GUIDE REPLACEMENT
When valve guide is removed, replace with oversized [0.2 mm (0.008 in)] valve guide.
1. To remove valve guide, heat cylinder head to 110 to 130 °C (230
to 266 °F) by soaking in heated oil.
2. Drive out valve guide with a press [under a 20 kN (2 ton, 2.2 US ton, 2.0 lmp ton) pressure] or a hammer and the valve guide drift
(commercial service tool).
WARNING:
Cylinder head contains heat . When working, wear protec-
tive equipment to avo id getting burned.
3. Using the valve guide reamer (commercial service tool), ream cylinder head valve guide hole.Standard
Intake and Exhaust : 6.000 - 6.018 mm (0.2362 - 0.2369 in)
Valve guide clearance:
Standard Intake : 0.020 - 0.053 mm (0.0008 - 0.0021 in)
Exhaust : 0.030 - 0.063 mm (0.0012 - 0.0025 in)
Limit Intake : 0.08 mm (0.0031 in)
Exhaust : 0.10 mm (0.0039 in)
SEM008A
SEM931C
Valve guide hole diameter (for service parts): Intake and exhaust: 10.175 - 10.196 mm (0.4006 - 0.4014 in)
SEM932C
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CYLINDER HEADEM-109
< SERVICE INFORMATION > [VQ35DE]
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4. Heat cylinder head to 110 to 130
°C (230 to 266 °F) by soaking in
heated oil.
5. Using the valve guide drift (commercial service tool), press valve guide from camshaft side to the dimensions as in the figure.
WARNING:
Cylinder head contains heat . When working, wear protec-
tive equipment to avo id getting burned.
6. Using the valve guide reamer (commercial service tool), apply reamer finish to valve guide.
VALVE SEAT CONTACT
 After confirming that the dimensions of valve guides and valves arewithin the specifications, perform this procedure.
 Apply prussian blue (or white lead) onto contacting surface of valve seat to check the condition of the valve contact on the surface.
 Check if the contact area band is continuous all around the circum-
ference.
 If not, grind to adjust valve fitting and check again. If the contacting surface still has “NG” conditions even after the re-check, replace
valve seat. Refer to "VALVE SEAT REPLACEMENT".
VALVE SEAT REPLACEMENT
When valve seat is removed, replace with oversized [0.5 mm (0.020 in)] valve seat.
1. Bore out old seat until it collapses. Boring shoul d not continue beyond the bottom face of the seat recess
in cylinder head. Set the machine depth stop to ensure this. Refer to EM-149, "
Standard and Limit".
CAUTION:
Prevent to scratch cylinder head by excessive boring.
SEM008A
Projection “L”
Intake and exhaust : 12.6 - 12.8 mm (0.496 - 0.504 in)
SEM950E
Standard:Intake and exhaust : 6.000 - 6.018 mm (0.2362 - 0.2369 in)
SEM932C
SBIA0322E
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EM-110
< SERVICE INFORMATION >[VQ35DE]
CYLINDER HEAD
2. Ream cylinder head recess diameter for service valve seat.
 Be sure to ream in circles concentric to valve guide center.This will enable valve to fit correctly.
3. Heat cylinder head to 110 to 130 °C (230 to 266 °F) by soaking in
heated oil.
4. Provide valve seats cooled well with dry ice. Force fit valve seat into cylinder head. WARNING:
Cylinder head contains heat. When working, wear protecti ve equipment to avoid getting burned.
CAUTION:
Avoid directly touching cold valve seats.
5. Using the valve seat cutter set (commercial service tool) or valve
seat grinder, finish seat to the specified dimensions. Refer to
EM-149, "
Standard and Limit".
CAUTION:
When using the valve seat cutter, firmly grip cutter handle
with both hands. Then, pr ess on the contacting surface all
around the circumference to cu t in a single drive. Improper
pressure on with cutter or cutting many different times may
result in stage valve seat.
6. Using compound, grind to adjust valve fitting.
7. Check again for normal contact. Refer to "VALVE SEAT CONTACT".
VALVE SPRING SQUARENESS
 Set a try square along the side of valve spring and rotate spring. Measure the maximum clearance between the top of spring and try
square.
 If it exceeds the limit, replace valve spring.
VALVE SPRING DIMENSIONS AND VALVE SPRING PRESSURE LOAD
Oversize [0.5 mm (0.020 in)] Intake : 38.500 - 38.516 mm (1.5157 - 1.5164 in)
Exhaust : 32.700 - 32.716 mm (1.2874 - 1.2880 in)
SEM795A
SEM008A
SEM934C
Limit : 2.1 mm (0.083 in)
PBIC0080E
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CYLINDER HEADEM-111
< SERVICE INFORMATION > [VQ35DE]
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 Check the valve spring pressure at specified spring height.
 If the installation load or load with valve open is out of the standard, replace valve spring. Standard:
Intake and exhaust Free height: 47.07 mm (1.8531 in)
Installation height
: 37.0 mm (1.457 in)
Installation load : 166 - 188 N (16.9 - 19.2 kg, 37 - 42 lb)
Height during valve open : 27.2 mm (1.071 in)
Load with valve open : 373 - 421 N (38.0 - 42.9 kg, 84 - 95 lb)
SEM113
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CYLINDER BLOCKEM-125
< SERVICE INFORMATION > [VQ35DE]
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6. Drain engine coolant by removing water drain plugs from cylin-
der block both sides at “B” and “C” and cylinder block front side
at “A” as shown in the figure.
7. Remove drive plate with power tool. Fix cr ankshaft with a ring gear stopper [SST: KV1011770 (J44716)],
and remove mounting bolts.
 Loosen mounting bolts in diagonal order.
CAUTION:
 Do not disassemble drive plate.
 Never place drive plate with signal plate facing down.
 When handling signal plate, take care not to damage or
scratch it.
 Handle signal plate in a ma nner that prevents it from
becoming magnetized.
8. Remove the following parts:  Intake manifold collector: Refer to EM-19, "
Component".
 Intake manifold: Refer to EM-24, "
Component".
 Oil pans (lower and upper): Refer to EM-30, "
Component (2WD Models)".
 Front and rear timing chain case: Refer to EM-64, "
Component".
 Cylinder head: Refer to EM-100, "
On-Vehicle Service".
9. Remove knock sensor. CAUTION:
Carefully handle sensor avoiding shocks.
PBIC2610E
SEM760G
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SERVICE DATA AND SPECIFICATIONS (SDS)
EM-149
< SERVICE INFORMATION > [VQ35DE]
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SERVICE DATA AND SPECIFICATIONS (SDS)
Standard and LimitINFOID:0000000001325750
GENERAL SPECIFICATIONS
DRIVE BELT
Cylinder arrangement
V- 6
Displacement cm
3 (cu in) 3,498 (213.45)
Bore and stroke mm (in) 95.5 x 81.4 (3.760 x 3.205)
Valve arrangement DOHC
Firing order 1-2-3-4-5-6
Number of piston rings Compression 2
Oil 1
Number of main bearings 4
Compression ratio 10.3
C o m p r e s s i o n p r e s s u r e k P a
(kg/cm
2, psi)/300 rpm Standard 1,275 (13.0, 185)
Minimum 981 (10.0, 142)
Differential limit between cylinders 98 (1.0, 14)
Cylinder number
Valve timing
(Intake valve timing control - “OFF”) Unit: degree
abcde f
240 238 −664 8 52
SEM713A
PBIC0187E
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EM-150
< SERVICE INFORMATION >[VQ35DE]
SERVICE DATA AND SPECIFICATIONS (SDS)
*: If belt tension gauge cannot be installed at check points shown, check drive belt tension at different location on the belt.
INTAKE MANIFOLD COLLECTOR, INTA
KE MANIFOLD AND EXHAUST MANIFOLD
Unit: mm (in)
SPARK PLUG
CAMSHAFT AND CAMSHAFT BEARING
Unit: mm (in)
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) —
PBIC5323E
Items Limit
Surface distortion Intake manifold collector (upper) 0.1 (0.004)
Intake manifold collector (lower) 0.1 (0.004)
Intake manifold 0.1 (0.004)
Exhaust manifold 0.3 (0.012)
Make NGK
Standard type PLFR5A-11
Hot type PLFR4A-11
Cold type PLFR6A-11
Gap (Nominal) 1.1 mm (0.043 in)
Items Standard Limit
Camshaft journal oil clearance No. 1 0.045 - 0.086 (0.0018 - 0.0034)
0.15 (0.0059)
No. 2, 3, 4 0.035 - 0.076 (0.0014 - 0.0030)
Camshaft bracket inner diameter No. 1 26.000 - 26.021 (1.0236 - 1.0244) —
No. 2, 3, 4 23.500 - 23.521 (0.9252 - 0.9260) —
Camshaft journal diameter No. 1 25.935 - 25.955 (1.0211 - 1.0218) —
No. 2, 3, 4 23.445 - 23.465 (0.9230 - 0.9238) —
Camshaft end play 0.115 - 0.188 (0.0045 - 0.0074) 0.24 (0.0094)
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SERVICE DATA AND SPECIFICATIONS (SDS)
EM-151
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*1: Cam wear limit
*
2: Total indicator reading
Valve Lifter
Unit: mm (in)
Valve Clearance
Unit: mm (in)
*: Approximately 80 °C (176 °F)
Available Valve Lifter
Unit: mm (in)
Camshaft cam height “A” Intake and exhaust 44.865 - 45.055 (1.7663 - 1.7738)
0.2 (0.008)*1
Camshaft runout (TIR*2)Less than 0.02 mm (0.0008) 0.05 (0.0020)
Camshaft sprocket runout (TIR*
2) — 0.15 (0.0059)
SEM671
Items Standard
Valve lifter outer diameter Identification (stamped)
mark “R” or “U” 33.977 - 33.987 (1.3377 - 1.3381)
Identification (stamped) mark “V” 33.980 - 33.990 (1.3378 - 1.3382)
Valve lifter hole diameter 34.000 - 34.016 (1.3386 - 1.3392)
Valve lifter clearance Identification (stamped) mark “R” or “U” 0.013 - 0.039 (0.0005 - 0.0015)
Identification (stamped) mark “V” 0.010 - 0.036 (0.0004 - 0.0014)
Items Cold Hot* (reference data)
Intake 0.26 - 0.34 (0.010 - 0.013) 0.304 - 0.416 (0.012 - 0.016)
Exhaust 0.29 - 0.37 (0.011 - 0.015) 0.308 - 0.432 (0.012 - 0.017)
Identification (stamped) mark Thickness
788U 788R 788V 7.88 (0.3102)
790U 790R 790V 7.90 (0.3110)
792U 792R 792V 7.92 (0.3118)
794U 794R 794V 7.94 (0.3126)
796U 796R 796V 7.96 (0.3134)
798U 798R 798V 7.98 (0.3142)
800U 800R 800V 8.00 (0.3150)
802U 802R 802V 8.02 (03.157)
804U 804R 804V 8.04 (0.3165)
806U 806R 806V 8.06 (0.3173)
808U 808R 808V 8.08 (0.3181)
810U 810R 810V 8.10 (0.3189)
812U 812R 812V 8.12 (0.3197)
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SERVICE DATA AND SPECIFICATIONS (SDS)
EM-153
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Unit: mm (in)
Valve Guide
Unit: mm (in)
Valve Seat
Valve head diameter “D”
Intake 37.0 - 37.3 (1.457 - 1.469)
Exhaust 31.2 - 31.5 (1.228 - 1.240)
Valve length “L” Intake 96.46 (3.7976)
Exhaust 93.99 (3.7004)
Valve stem diameter “d” Intake 5.965 - 5.980 (0.2348 - 0.2354)
Exhaust 5.955 - 5.970 (0.2344 - 0.2350)
Valve seat angle “ α” Intake
45°15 ′ - 45 °45 ′
Exhaust
Valve margin “T” Intake 1.1 (0.043)
Exhaust 1.3 (0.051)
Valve margin “T” limit 0.5 (0.020)
Valve stem end surface grinding limit 0.2 (0.008)
SEM188
Items Standard Oversize (Service) [0.2 (0.008)]
Va l v e g u i d e Outer diameter 10.023 - 10.034 (0.3946 - 0.3950) 10.223 - 10.234 (0.4025 - 0.4029)
Inner diameter (Finished size) 6.000 - 6.018 (0.2362 - 0.2369)
Cylinder head valve guide hole diameter 9.975 - 9.996 (0.3927 - 0.3935) 10.175 - 10.196 (0.4006 - 0.4014)
Interference fit of valve guide 0.027 - 0.059 (0.0011 - 0.0023) Items Standard Limit
Valve guide clearance Intake 0.020 - 0.053 (0.0008 - 0.0021) 0.08 (0.0031)
Exhaust 0.030 - 0.063 (0.0012 - 0.0025) 0.09 (0.0039)
Projection length “L” 12.6 - 12.8 (0.496 - 0.504)
SEM950E
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