engine INFINITI FX35 2008 Service Manual

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-93
< 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. 1 cylinder at compression TDC
c. Rotate crankshaft by 240 degrees clockwise (when vi ewed from engine front) to align No. 3 cylinder at
TDC of its compression stroke.
NOTE:
 To align cylinder No. 3 with the compression top dead center, place matching marks (A) on the crankshaft pulley (1) side and
on the cylinder block side at a point 240 ° counterclockwise
from the compression top dead center using the hex head of
the crankshaft pulley bolt as a guide.
Measuring position (right bank) No. 1 CYL. No. 3 CYL. No. 5 CYL.
No. 1 cylinder at
compression TDC EXH
×
INT ×
Measuring position (left bank) No. 2 CYL. No. 4 CYL. No. 6 CYL.
No. 1 cylinder at
compression TDC INT
×
EXH ×
PBIC2054E
PBIC4628J
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EM-94
< SERVICE INFORMATION >[VQ35DE]
CAMSHAFT
 By referring to the figure, measure the valve clearances at
locations marked “ ×” as shown in the table below (locations
indicated in the figure).
 No. 3 cylinder at compression TDC
d. Rotate crankshaft by 240 degrees clockwise (when viewed from engine front) to align No. 5 cylinder at TDC of compression stroke.
NOTE:
 To align cylinder No. 5 with the compression top dead center,place matching marks (A) on the crankshaft pulley (1) side and
on the cylinder block side at a point 240 ° counterclockwise
from the compression top dead center using the hex head of
the crankshaft pulley bolt as a guide.
Measuring position (right bank) No. 1 CYL. No. 3 CYL. No. 5 CYL.
No. 3 cylinder at
compression TDC EXH
×
INT ×
Measuring position (left bank) No. 2 CYL. No. 4 CYL. No. 6 CYL.
No. 3 cylinder at
compression TDC INT
×
EXH ×
PBIC2055E
PBIC4628J
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EM-96
< SERVICE INFORMATION >[VQ35DE]
CAMSHAFT
 Thickness of new valve lifter can be identified by stamp marks
on the reverse side (inside the cylinder).
Available thickness of valve lifter: 27 sizes with range 7.88 to 8.40 mm (0.3102 to 0.3307 in) in steps of 0.02
mm (0.0008 in) (when manufactured at factory). Refer to EM-149, "
Standard and Limit".
CAUTION:
Install identification letter at the end, “U”, “R” and “V” at each of proper positions.
6. Install selected valve lifter.
7. Install camshaft. Refer to EM-84, "
Removal and Installation".
8. Manually turn crankshaft pulley a few turns.
9. Make sure that the valve clearances for cold engine ar e within the specifications by referring to the speci-
fied values. Refer to "INSPECTION".
10. Install all removal parts in the reverse order of removal. Refer to EM-84, "
Removal and Installation".
11. Warm up the engine, and check for unusual noise and vibration.
KBIA0119E
Stamp mark Thickness
788U
790U ·
·
840U 788R
790R
·
·
840R 788V
790V
·
·
840V 7.88 mm
7.90 mm
·
·
8.40 mm
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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-98
< SERVICE INFORMATION >[VQ35DE]
OIL SEAL
2. Remove front oil seal using a suitable tool.
CAUTION:
Be careful not to damage front timing chain case and crank-
shaft.
INSTALLATION
1. Apply new engine oil to both oil seal lip and dust seal lip of new front oil seal.
2. Install front oil seal. Install front oil seal so that each seal lip is oriented as shown in
the figure.
 Using a suitable drift, press-fit until the height of front oil seal is level with the mounting surface.
- Suitable drift: outer diameter 60 mm (2.36 in), inner diameter
50 mm (1.97 in).
 Make sure the garter spring is in position and seal lips not inverted
CAUTION:
 Be careful not to damage front timing chain case and
crankshaft.
 Press-fit straight and avoid causing burrs or tilting oil
seal.
3. Install in the reverse order of removal after this step.
Removal and Installation of Rear Oil SealINFOID:0000000001325736
REMOVAL
1. Remove oil pan (upper). Refer to EM-30, "Component (2WD Models)".
2. Remove transmission assembly. Refer to AT-241, "
Removal and Installation (2WD Models)".
3. Remove drive plate. Refer to EM-122, "
Component".
4. Use a seal cutter (SST) to cut away liquid gasket and remove rear oil seal retainer.
CAUTION:
Be careful not to damage mounting surface.
NOTE:
Regard both rear oil seal and retainer as an assembly.
SEM829E
SEM715A
SEM829E
SEM830E
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OIL SEALEM-99
< SERVICE INFORMATION > [VQ35DE]
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INSTALLATION
1. Remove old liquid gasket on mating surfaces of cylinder block and oil pan (upper) using a scraper.
2. Apply new engine oil to both oil seal lip and dust seal lip of new rear oil seal retainer.
3. Apply a continuous bead of liquid gasket with the tube presser
(commercial service tool) to rear oil seal retainer as shown in the
figure.
Use Genuine RTV Silicone Seal ant or equivalent. Refer to
GI-44, "
Recommended Chemical Product and Sealant".
 Assembly should be done within 5 minutes after coating.
4. Install rear oil seal retainer to cylinder block. Refer to EM-122, "
Component".
 Make sure the garter spring is in position and seal lips not inverted.
5. Install in the reverse order of removal after this step.
PBIC2661E
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EM-100
< SERVICE INFORMATION >[VQ35DE]
CYLINDER HEAD
CYLINDER HEAD
On-Vehicle ServiceINFOID:0000000001325737
CHECKING COMPRESSION PRESSURE
1. Warm up engine thoroughly. Then, stop it.
2. Release fuel pressure. Refer to
EC-87, "
Fuel Pressure Check".
3. Disconnect fuel pump fuse to avoid fuel injection during mea- surement.
4. Remove engine cover with power tool. Refer to EM-19, "
Component".
5. Remove ignition coil and spark plug from each cylinder. Refer to EM-42, "
Component" and EM-43, "Com-
ponent".
6. Connect engine tachometer (not required in use of CONSULT-III).
7. Install compression gauge with an adapter (commercial service tool) onto spark plug hole.
 Use the adapter whose picking up end inserted to spark plughole is smaller than 20 mm (0.79 in) in diameter. Otherwise, it
may be caught by cylinder head during removal.
8. Turn ignition switch to “START” for cranking. When the gauge pointer stabilizes, read the compression
pressure and the engine rpm. Perform these steps to check each cylinder.
Compression pressure:
Unit: kPa (kg/cm2, psi) /rpm
CAUTION:
Always use a fully changed battery to obtain the specified engine speed.
SBIA0466E
PBIC0900E
SBIA0533E
Standard Minimum Deference limit between cylinders
1,275 (13.0, 185)/300 981 (10.0, 142)/300 98 (1.0, 14)/300
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