intake INFINITI FX35 2008 Service Manual

EM-84
< SERVICE INFORMATION >[VQ35DE]
CAMSHAFT
 Refer to
GI-8, "Component" for symbols in the figure.
Removal and InstallationINFOID:0000000001325732
REMOVAL
1. Remove front timing chain case, camshaft sprocket, timing chain and rear timing chain case. Refer to EM-
64, "Component".
2. Remove camshaft position sensor (PHASE) (right and left banks) from cylinder head back side.
CAUTION:
 Handle carefully to avoid dropping and shocks.
 Do not disassemble.
 Do not allow metal powder to adhere to magnetic part at
sensor tip.
 Do not place sensors in a location where they are
exposed to magnetism.
3. Remove intake valve timing control solenoid valves.  Discard intake valve timing control solenoid valve gaskets anduse new gaskets for installation.
4. Remove camshaft brackets.  Mark camshafts, camshaft brackets and bolts so they are placed in the same position and direction forinstallation.
 Equally loosen camshaft bracket bolts in several steps in reverse order as shown in the figure.
5. Remove camshaft.
KBIA1046E
SEM443GA
PBIC2050E
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CAMSHAFTEM-85
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6. Remove valve lifter.
 Identify installation positions, and store them without mixing them up.
7. Remove timing chain tensioner (secondary) from cylinder head.  Remove timing chain tensioner (secondary) with its stopperpin attached.
NOTE:
Stopper pin was attached when timing chain (secondary) was
removed.
INSPECTION AFTER REMOVAL
Camshaft Runout
1. Put V-block on precise flat table, and support No. 2 and 4 jour- nals of camshaft.
CAUTION:
Do not support No. 1 journal (on the side of camshaft
sprocket) because it has a different diameter from the other
three locations.
2. Set a dial indicator vertically to No. 3 journal.
3. Turn camshaft to one direction with hands, and measure the camshaft runout on a dial indicator. (Total indicator reading)
4. If it exceeds the limit, replace camshaft.
Camshaft Cam Height
1. Measure the camshaft cam height with a micrometer.
2. If wear exceeds the limit, replace camshaft.
Camshaft Journa l Oil Clearance
CAMSHAFT JOURNAL DIAMETER
 Measure the outer diameter of camshaft journal with a micrometer.
PBIC2111E
Standard : Less than 0.02 mm (0.0008 in)
Limit : 0.05 mm (0.0020 in)PBIC0929E
Standard cam height (intake and exhaust)
: 44.865 - 45.055 mm (1.7663 - 1.7738 in)
Cam wear limit : 0.2 mm (0.008 in)
EMQ0072D
Standard:No. 1 : 25.935 - 25.955 mm (1.0211 - 1.0218 in)
No. 2, 3, 4 : 23.445 - 23.465 mm (0.9230 - 0.9238 in)
PBIC0040E
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CAMSHAFTEM-87
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2. Measure the camshaft sprocket runout with a dial indicator.
(Total indicator reading)
 If it exceeds the limit, replace camshaft sprocket.
Valve Lifter
Check if surface of valve lifter has any wear or cracks.
 If anything above is found, replace valve lifter. Refer to EM-149,
"Standard and Limit".
Valve Lifter Clearance
VALVE LIFTER OUTER DIAMETER Measure the outer diameter at 1/2 height of valve lifter with a
micrometer since valve lifter is in barrel shape.
VALVE LIFTER HOLE DIAMETER Measure the inner diameter of va lve lifter hole of cylinder head with
an inside micrometer.
VALVE LIFTER CLEARANCE (Valve lifter clearance) = (Valve lifter hole diameter) – (Valve lifter outer diameter) Limit : 0.15 mm (0.0059 in)
PBIC0930E
KBIA0182E
Standard
Identification (stamped) mark “R” or “U” : 33.977 - 33.987 mm (1.3377 - 1.3381 in)
Identification (stamped) mark “V” : 33.980 - 33.990 mm (1.3378 - 1.3382 in)
JEM798G
Standard (Intake and exhaust): 34.000 - 34.016 mm (1.3386 - 1.3392 in)
SEM867E
StandardIdentification (stamped) mark “R” or “U” : 0.013 - 0.039 mm (0.0005 - 0.0015 in)
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EM-90
< SERVICE INFORMATION >[VQ35DE]
CAMSHAFT
5. Tighten camshaft bracket bolts in the following steps, in numeri-
cal order as shown.
a. Tighten No. 7 to 10 in numerical order as shown.
b. Tighten No. 1 to 6 in numerical order as shown.
c. Tighten No. 1 to 10 in numerical order as shown.
d. Tighten No. 1 to 10 in numerical order as shown.
CAUTION:After tightening mounting bolts of camshaft brackets (No.
1), be sure to wipe off excessive liquid gasket from the
parts list below.
 Mating surface of rocker cover
 Mating surface of rear timing chain case
6. Measure difference in levels between front end faces of cam- shaft bracket (No. 1) and cylinder head.
 Measure two positions (both intake and exhaust side) for asingle bank.
 If the measured value is out of the standard, re-install cam- shaft bracket (No. 1).
7. Inspect and adjust the valve clearance. Refer to EM-91, "
Valve Clearance".
8. Install in the reverse order of removal after this step.
INSPECTION AFTER INSTALLATION
Inspection of Camshaft Sprocket (INT) Oil Groove
CAUTION:
 Perform this inspection only when DTC P0011 or P0021 are detected in self-diagnostic results of
CONSULT-III and it is directed according to inspection procedure of EC section. Refer to EC-117,
"CONSULT-III Function (ENGINE)".
 Check when engine ins cold so as to pr event burns from any splashing engine oil.
1. Check the engine oil level. Refer to LU-5, "
Inspection".
2. Perform the following procedure so as to prevent the engine from being unintentionally started while
checking.
a. Release fuel pressure. Refer to EC-87, "
Fuel Pressure Check".
b. Disconnect ignition coil and injector harness connectors.
3. Remove intake valve timing control solenoid valve. Refer to EM-83, "
Component".
: 1.96 N·m (0.20 kg-m, 1 ft-lb)
: 1.96 N·m (0.20 kg-m, 1 ft-lb)
: 5.88 N·m (0.60 kg-m, 4 ft-lb)
: 10.4 N·m (1.1 kg-m, 8 ft-lb)
PBIC2050E
Standard : –0.14 to 0.14 mm (–0.006 to 0.006 in)
EMQ0044D
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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
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EM-92
< SERVICE INFORMATION >[VQ35DE]
CAMSHAFT
In cases of removing/installing or replacing camshaft and valve-
related parts, or of unusual engine conditions due to changes in
valve clearance (found malfunctions during stating, idling or causing
noise), perform inspection as follows:
1. Remove rocker covers (right and left bank). Refer to
EM-51, "
Component".
2. Measure the valve clearance as follows:
a. Set No. 1 cylinder at TDC of its compression stroke.  Rotate crankshaft pulley clockwise to align timing mark(grooved line without color) with timing indicator.
 Make sure that intake and exhaust cam nose on No. 1 cylinder (engine front side of right bank) are located as shown in the
figure.
 If not, turn crankshaft one revolution (360 degrees) and align as shown in the figure.
b. Use a feeler gauge, measure t he clearance between valve lifter
and camshaft.
Valve clearance:
Unit: mm (in)
*: Approximately 80°C (176 °F)
SEM713A
KBIA1717J
SEM418G
SEM139D
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)
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CAMSHAFTEM-95
< SERVICE INFORMATION > [VQ35DE]
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 By referring to the figure, measure the valve clearances at
locations marked “ ×” as shown in the table below (locations
indicated in the figure).
 No. 5 cylinder at compression TDC
3. For measured value are out of the standard, perform adjustment. Refer to "ADJUSTMENT".
ADJUSTMENT
 Perform adjustment depending on selected head thickness of valve lifter.
1. Measure the valve clearance. Refer to "INSPECTION".
2. Remove camshaft. Refer to EM-84, "
Removal and Installation".
3. Remove valve lifters at the loca tions that are out of the standard.
4. Measure the center thickness of the removed valve lifters with a micrometer.
5. Use the equation below to calculate valve lifter thickness for replacement.
Measuring position (right bank) No. 1 CYL. No. 3 CYL. No. 5 CYL. No. 5 cylinder at
compression TDC EXH
×
INT ×
Measuring position (left bank) No. 2 CYL. No. 4 CYL. No. 6 CYL.
No. 5 cylinder at
compression TDC INT
×
EXH ×
PBIC2056E
KBIA0057E
Valve lifter thickness calculation: t = t1+ (C1 – C2)
t = Valve lifter thickness to be replaced
t
1 = Removed valve lifter thickness
C
1= Measured valve clearance
C
2= Standard valve clearance: Intake : 0.30 mm (0.012 in)*
Exhaust : 0.33 mm (0.013 in)*
*: Approximately 20 °C (68 °F)
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OIL SEALEM-97
< SERVICE INFORMATION > [VQ35DE]
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OIL SEAL
Removal and Installation of Valve Oil SealINFOID:0000000001325734
REMOVAL
1. Remove camshaft relating to valve oil seal to be removed. Refer to
EM-83, "Component".
2. Remove valve lifters. Refer to EM-83, "
Component".
3. Turn crankshaft until the cylinder requiring new oil seal s is at TDC. This will prevent valve from dropping
into cylinder.
4. Remove valve collet.  Compress valve spring with the valve spring compressor, theattachment, the adapter (SST). Remove valve collet with a
magnet hand.
CAUTION:
When working, take care not to damage valve lifter holes.
5. Remove valve spring retainer, and valve spring.
6. Remove valve oil seal using the valve oil seal puller (SST).
INSTALLATION
1. Apply new engine oil on new valve oil seal joint and seal lip.
2. Using the valve oil seal drift (SST), press fit valve seal to height “H” shown in figure.
NOTE:
Dimension “H”: Height measured before valve spring seat instal-
lation
3. Install in the reverse order of removal after this step.
Removal and Installati on of Front Oil SealINFOID:0000000001325735
REMOVAL
1. Remove the following parts:
 Undercover
 Drive belts: Refer to EM-15, "
Removal and Installation".
 Crankshaft pulley: Refer to EM-64, "
Component".
PBIC1803E
PBIC0884E
Intake and exhaust : 14.3 - 14.9 mm (0.563 - 0.587 in)
PBIC2769E
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EM-102
< SERVICE INFORMATION >[VQ35DE]
CYLINDER HEAD
Temporary fitting means the status that engine is
adequately stable though the hoist is released
from hanging.
NOTE:
At the time of the start of this procedure front suspension member is removed, and cylinder head is
hanged by hoist with the engine slinger installed.
3. Release the hoist from hanging, then remove the engine slinger.
4. Remove the following parts:  Fuel tube and fuel injector assembly: Refer to EM-45, "
Component".
 Intake manifold: Refer to EM-24, "
Component".
 Exhaust manifold: Refer to EM-26, "
Component".
 Water inlet and thermostat assembly: Refer to CO-27, "
Component".
 Water outlet, water pipe and heater pipe: Refer to CO-29, "
Component".
5. Remove cylinder head bolts in reverse order as shown in the fig- ure with cylinder head bolt wrench (commercial service tool) and
power tool to remove cylinder heads (right and left banks).
6. Remove cylinder head gaskets.
INSPECTION AFTER REMOVAL
Cylinder Head Bolt s Outer Diameter
 Cylinder head bolts are tightened by plastic zone tightening
method. Whenever the size difference between “d1” and “d2”
exceeds the limit, replace them with new one.
 If reduction of outer diameter appear s in a position other than “d2”,
use it as “d2” point.
Cylinder Head Distortion
NOTE:
When performing this inspection, cylinder block distortion should be also checking. Refer to EM-138, "
Inspec-
tion After Disassembly".
1. Using a scraper, wipe off oil, scale, gasket, seal ant and carbon deposits from surface of cylinder head.
CAUTION:
Do not allow gasket fragme nts to enter engine oil or engine coolant passages.
PBIC2057E
Limit (“d1” – “d2”) : 0.11 mm (0.0043 in)
PBIC2480E
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EM-106
< SERVICE INFORMATION >[VQ35DE]
CYLINDER HEAD
6. Remove valve oil seal using the valve oil seal puller (SST).
7. If valve seat must be replaced, refer to
EM-107, "
Inspection After Disassembly".
8. If valve guide must be replaced, refer to EM-107, "
Inspection After Disassembly".
9. Remove spark plug tube, as necessary.  Using a pliers, pull spark plug tube out of cylinder head.
CAUTION:
 Take care not to damage cylinder head.
 Once removed, spark plug tube will be deformed and cannot be reused. Do not remove it unless
absolutely necessary.
ASSEMBLY
1. When valve guide is removed, install it. Refer to EM-107, "Inspection After Disassembly".
2. When valve seat is removed, install it. Refer to EM-107, "
Inspection After Disassembly".
3. Install new valve oil seals as follows:
a. Apply new engine oil on valve oil seal joint and seal lip.
b. Install with the valve oil seal drift (SST) to match dimension in the figure.
4. Install valve spring seat.
5. Install valve.  Larger diameter valves are for intake side.NOTE:
Larger diameter valves are for intake side.
6. Install valve spring (uneven pitch type).  Install narrow pitch end (paint mark) to cylinder head side(valve spring seat side).
 Intake side and exhaust side valve springs are different. Install
them referring to the following paint mark collar.
7. Install valve spring retainer.
PBIC0884E
Height “H” (Without valve spring seat installed) Intake and exhaust : 14.3 - 14.9 mm (0.563 - 0.587 in)
PBIC2769E
Paint mark collarIntake and Exhaust : Blue
SEM085D
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