exh INFINITI FX35 2004 Service Manual

EM-68
[VQ35DE]
TIMING CHAIN
Revision: 2004 November 2004 FX35/FX45
28. Remove internal chain guide, tension guide and slack guide.
NOTE:
Tension guide can be removed after removing timing chain (pri-
mary).
29. Remove timing chain (primary), tension guide and crankshaft sprocket.
CAUTION:
After removing timing chain, do not turn crankshaft and camshaft separately, or valves will strike
piston heads.
30. Remove timing chain (secondary) and camshaft sprockets as the following:
a. Attach a suitable stopper pin to right and left camshaft chain ten-
sioners (for secondary timing chains).
NOTE:
For removal and installation of secondary chain tensioner, refer
to EM-82, "
CAMSHAFT" . (Removing No. 1 camshaft bracket is
required.)
b. Remove intake and exhaust camshaft sprocket bolts.

Apply paint to timing chain and camshaft sprockets for align-
ment during installation.

Secure the hexagonal portion of camshaft using a wrench to
loosen mounting bolts.
c. Remove timing chain (secondary) together with camshaft sprockets.

Turn camshaft slightly to secure slackness of timing chain on timing chain tensioner (secondary) side.
PBIC2266E
SEM923G
KBIA1698J

EM-74
[VQ35DE]
TIMING CHAIN
Revision: 2004 November 2004 FX35/FX45
6. After installing rear timing chain case, check surface height dif-
ference between following parts on oil pan mounting surface.

If not within standard, repeat above installation procedure.
7. Position crankshaft so No. 1 piston is set at TDC on the com-
pression stroke.

Make sure that dowel pin hole, dowel pin and crankshaft key
are located as shown in the figure.
NOTE:
Though camshaft does not stop at position as shown in the
figure, for the placement of cam nose, it is generally accepted
camshaft is placed for the same direction of the figure.
CAUTION:
Hole on small dia. side must be used for intake side dowel pin hole. Do not misidentify (ignore
big dia. side).
8. Install timing chains (secondary) and camshaft sprockets.
CAUTION:
Matching marks between timing chain and sprockets slip
easily. Confirm all matching mark positions repeatedly dur-
ing the installation process.
a. Push plunger of secondary chain tensioner and keep it pressed
in with a stopper pin.Standard (Rear timing chain case to cylinder block):
–0.24 to 0.14 mm (–0.0094 to 0.0055 in)
SEM943G
Camshaft dowel pin hole (intake side)
: At cylinder head upper face side in each bank.
Camshaft dowel pin (exhaust side)
: At cylinder head upper face side in each bank.
Crankshaft key
: At cylinder head side of right bank.
KBIA1073E
SEM430G

TIMING CHAIN
EM-75
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Revision: 2004 November 2004 FX35/FX45
b. Install timing chains (secondary) and camshaft sprockets.

Align the mating marks on secondary timing chain (gold link)
with the ones on intake and exhaust camshaft sprockets
(stamped), and install them.
NOTE:

Mating marks for intake camshaft sprocket are on the back
side of secondary camshaft sprocket.

There are two types of mating marks, circle and oval types.
They should be used for the right and left banks, respec-
tively.

Align dowel pin and pin hole on camshaft with the groove and
dowel pin on sprocket, and install them.

On the intake side, align the pin hole on the small diameter
side of camshaft front end with dowel pin on the back side of
camshaft sprocket, and install them.

On the exhaust side, align dowel pin on camshaft front end
with the pin groove on camshaft sprocket, and install them.

In case that positions of each mating mark and each dowel
pin are not fit on mating parts, make fine adjustment to the
position holding the hexagonal portion on camshaft with wrench or equivalent.

Mounting bolts for camshaft sprockets must be tightened in the next step. Tightening them by hand is
enough to prevent the dislocation of dowel pins.

It may be difficult to visually check the dislocation of mating
marks during and after installation. To make the matching
easier, make a mating mark on the top of sprocket teeth and
its extended line in advance with paint.
9. After confirming the mating marks are aligned, tighten camshaft
sprocket mounting bolts.

Secure camshaft using a wrench at the hexagonal portion to
tighten mounting bolts.Right bank : use circle type.
Left bank : use oval type.
PBIC2049E
PBIC0891E
KBIA1698J

TIMING CHAIN
EM-81
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Revision: 2004 November 2004 FX35/FX45

Warm up engine thoroughly to make sure there is no leakage of engine coolant, engine oil and working
fluid, fuel and exhaust gas.

Bleed air from passages in pipes and tubes of applicable lines, such as in cooling system.

After cooling down engine, again check amounts of engine coolant, engine oil and working fluid. Refill to
specified level, if necessary.
Summary of the inspection items:
Item Before starting engine Engine running After engine stopped
Engine coolant Level Leakage Level
Engine oil Level Leakage Level
Working fluid Level Leakage Level

EM-82
[VQ35DE]
CAMSHAFT
Revision: 2004 November 2004 FX35/FX45
CAMSHAFTPFP:13001
Removal and InstallationABS00FPH
1.Intake valve timing control solenoid
valve2. Gasket 3. Camshaft bracket (No. 2 to No. 4)
4. Camshaft (EXH) 5. Camshaft (INT) 6. Camshaft bracket (No. 1)
7. Dowel pin 8. Valve lifter 9. O-ring
10. Chain tensioner 11. Spring 12. Plunger
13. Cylinder head (right bank) 14. Cylinder head (left bank) 15.Camshaft position sensor (PHASE)
(right bank)
16.Camshaft position sensor (PHASE)
(left bank)
SBIA0576E

CAMSHAFT
EM-83
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Revision: 2004 November 2004 FX35/FX45
REMOVAL
1. Remove front timing chain case, camshaft sprocket, timing chain and rear timing chain case. Refer to EM-
63, "TIMING CHAIN" .
2. If necessary, 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 valve from No.1
camshaft bracket.
4. Remove intake and exhaust camshaft brackets.

Mark camshafts, camshaft brackets, and bolts so they are
placed in the same position and direction for installation.

Equally loosen camshaft bracket bolts in several steps in the
reverse order as shown in the figure.
5. Remove camshaft.
6. Remove valve lifter.

Identify installation positions, and store them without mixing them up.
KBIA1046E
SEM443GA
PBIC2050E

EM-84
[VQ35DE]
CAMSHAFT
Revision: 2004 November 2004 FX35/FX45
7. Remove secondary timing chain tensioner from cylinder head.

Remove chain tensioner with its stopper pin attached.
NOTE:
Stopper pin was attached when secondary timing chain was
removed.
INSPECTION AFTER REMOVAL
Camshaft Runout
1. Put V block on precise flat bed, and support No. 2 and No. 4
journal of camshaft.
CAUTION:
Do not support journal No. 1 (on the side of camshaft
sprocket) because it has a different diameter from the other
three locations.
2. Set dial gauge vertically to No. 3 journal.
3. Turn camshaft to one direction with hands, and measure cam-
shaft runout on dial gauge. (Total indicator reading)
4. If it exceeds the standard, replace camshaft.
Camshaft Cam Height
1. Measure camshaft cam height.
2. If wear is beyond the limit, replace camshaft.
Camshaft Journal Oil Clearance
Outer Diameter of Camshaft Journal
Measure outer diameter of camshaft journal.
Inner Diameter of Camshaft Bracket

Tighten camshaft bracket bolt with specified torque. Refer to EM-87, "INSTALLATION" .
SBIA0499E
Standard : Less than 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 outer diameter:
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

EM-86
[VQ35DE]
CAMSHAFT
Revision: 2004 November 2004 FX35/FX45
2. Measure camshaft sprocket runout with dial indicator. (Total indi-
cator 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.
Valve Lifter Clearance
Outer Diameter of Valve Lifter
Measure outer diameter at 1/2 height of valve lifter with micrometer
since valve lifter is in barrel shape.
Valve Lifter Hole Diameter
Using inside micrometer, measure diameter of valve lifter hole of cyl-
inder head.
Calculation of Valve Lifter Clearance
(Valve lifter clearance) = (hole diameter of valve lifter) – (outer diameter of valve lifter).
If it exceeds the standard, referring to each standard of valve lifter outer diameter and valve lifter hole diame-
ter, replace either or both valve lifter and cylinder head.Limit : 0.15 mm (0.0059 in)
PBIC0930E
KBIA0182E
Valve lifter outer diameter (Intake and exhaust)
: 33.977 - 33.987 mm (1.3377 - 1.3381 in)
JEM798G
Standard (Intake and exhaust)
: 34.000 - 34.016 mm (1.3386 - 1.3392 in)
SEM867E
Standard (Intake and exhaust)
: 0.013 - 0.039 mm (0.0005 - 0.0015 in)

CAMSHAFT
EM-87
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Revision: 2004 November 2004 FX35/FX45
INSTALLATION
1. Install secondary chain tensioners on both sides of cylinder
head.

Install chain tensioner with its stopper pin attached.

Install tensioner with sliding part facing downward on 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 exhaust side.

Follow your identification marks made during removal, or fol-
low the identification marks that are present on new cam-
shafts for proper placement and direction.

Install camshaft so that dowel pin hole and dowel pin on front
end face are positioned as shown in figure. (No. 1 cylinder
TDC on its compression stroke)
NOTE:
Large- and small-pin holes are located on front end face of
intake camshaft, at intervals of 180°. Face small dia. side pin
hole upward (in cylinder head upper face direction).
SBIA0499E
KBIA1071E
Bank INT/EXH Dowel pinPaint marks
Identification
mark
M1 M2
RightINT No Pink No RE
EXH Yes No Orange RE
LeftINT No Pink No LH
EXH Yes No Orange LH
KBIA1009E
KBIA1072E

EM-90
[VQ35DE]
CAMSHAFT
Revision: 2004 November 2004 FX35/FX45

Rotate crankshaft pulley clockwise to align timing mark
(grooved line without color) with timing indicator.

Make sure No. 1 cylinder intake and exhaust cam nose is fac-
ing in direction as shown in figure.

If not, rotate crankshaft pulley 360° clockwise (when viewed
from front).
b. Using a feeler gauge, measure valve clearance.
*: Approximately 80°C (176°F) (Reference data)
KBIA1717J
SEM418G
Valve clearance standard:
Cold Intake : 0.26 - 0.34 mm (0.010 - 0.013 in)
Exhaust : 0.29 - 0.37 mm (0.011 - 0.015 in)
Hot* Intake : 0.304 - 0.416 mm (0.012 - 0.016 in)
Exhaust : 0.308 - 0.432 mm (0.012 - 0.016 in)
SEM139D
KBIA0185E