INFINITI FX35 2008 Service Manual

CAMSHAFTEM-87
< SERVICE INFORMATION > [VQ35DE]
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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-88
< SERVICE INFORMATION >[VQ35DE]
CAMSHAFT
 If the calculated value is out of the standard, referri
ng to each standard of valve lifter outer diameter and
valve lifter hole diameter, replace either or both valve lifter and cylinder head.
INSTALLATION
1. Install timing chain tensioners (secondary) on both sides of cyl- inder head.
 Install timing chain tensioner with its stopper pin attached.
 Install timing chain tensioner with sliding part facing downwardon right-side cylinder head, and with sliding part facing upward
on left-side cylinder head.
 Install new O-ring as shown in the figure.
2. Install valve lifter.  Install it in the original position.
3. Install camshafts.  Install camshaft with dowel pin attached to its front end face on
the exhaust side.
 Follow your identification marks made during removal, or fol- low the identification marks that are present on new camshafts
for proper placement and direction.
 Install camshaft so that dowel pin hole and dowel pin on front end face are positioned as shown in the figure. (No. 1 cylinder
TDC on its compression stroke)
NOTE:
 Large and small pin holes are located on front end face ofcamshaft (INT), at intervals of 180 degrees. Face small dia.
side pin hole upward (in cylinder head upper face direction).
 Though camshaft does not stop at the portion as shown in the figure, for the placement of cam nose, it is generally
accepted camshaft is placed for the same direction of the fig-
ure. Identification (stamped) mark “V”
: 0.010 - 0.036 mm (0.0004 - 0.0014 in)
PBIC2111E
KBIA1071E
Bank INT/EXH Dowel pin Paint marks
Identification
mark
M1 M2
RH EXH Yes No Orange RE
INT No Pink No RE
LH INT No Pink No LH
EXH Yes No Orange LH
KBIA1009E
PBIC2478E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
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CAMSHAFTEM-89
< SERVICE INFORMATION > [VQ35DE]
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4. Install camshaft brackets.
 Remove foreign material completely from camshaft bracketbackside and from cylinder head installation face.
 Install camshaft bracket in original position and direction as shown in figure.
 Install camshaft brackets (No. 2 to 4) aligning the stamp marks
as shown in the figure.
NOTE:
There are no identification marks indicating left and right for
camshaft bracket (No. 1).
 Apply liquid gasket to mating surface of camshaft bracket (No. 1) as shown on both right and left banks.
Use Genuine RTV Silicone Seal ant or equivalent. Refer to
GI-44, "
Recommended Chemical Product and Sealant".
PBIC2051E
PBIC2052E
PBIC2660E
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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-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
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
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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
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

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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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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