2006 INFINITI FX35 exh

EM-28
[VQ35DE]
EXHAUST MANIFOLD AND THREE WAY CATALYST
Revision: 2006 December 2006 FX35/FX45
INSPECTION AFTER REMOVAL
Surface Distortion

Check the surface distortion of the exhaust manifold mating sur-
face with a straightedge and a feeler gauge.

If it exceeds the limit, replace exhaust manifold.
INSTALLATION
Note the following, and install in the reverse order of removal.
Exhaust Manifold Gasket

Install in direction shown below. (Follow same procedure for
both banks.)

Locate thick side of port connecting part on right side from tech-
nician’s view.

Locate round press in thick side of port connecting part above
center level line of port.
Exhaust Manifold

If stud bolts were removed, install them and tighten to the specified torque below.

Install exhaust manifold and tighten mounting bolts in numerical
order as shown in the figure.
NOTE:
Tighten nuts No. 1 and 2 in two steps. The numerical order No. 7
and 8 shows second step. Limit : 0.3 mm (0.012 in)
PBIC1096E
KBIA1051E
: 14.7 N·m (1.5 kg-m, 11 ft-lb)
PBIC2042E

EXHAUST MANIFOLD AND THREE WAY CATALYST EM-29
[VQ35DE]
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Revision: 2006 December 2006 FX35/FX45
Air Fuel Ratio Sensor and Heated Oxygen Sensor
CAUTION:

Before installing a new air fuel ratio sensor and new heated oxygen sensor, clean exhaust system
threads using heated oxygen sensor thread cleaner tool (Commercial Service Tool: J-43897-18 or
J-43897-12) and apply anti-seize lubricant.

Do not over torque air fuel ratio sensor and heated oxygen sensor. Doing so may cause damage to
air fuel ratio sensor and heated oxygen sensor, resulting in the “MIL” coming on.

FRONT TIMING CHAIN CASE EM-55
[VQ35DE]
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Revision: 2006 December 2006 FX35/FX45
16. Remove collared O-ring from front timing chain case (left and right side).
17. Remove rocker covers (right and left banks). Refer to EM-51, "
ROCKER COVER" .
NOTE:
When only timing chain (primary) is removed, rocker cover does not need to be removed.
18. Obtain No. 1 cylinder at TDC of its compression stroke as follows:
NOTE:
When timing chain is not removed/installed, this step is not required.
a. Rotate crankshaft pulley clockwise to align timing mark (grooved line without color) with timing indicator.
b. Make sure that intake and exhaust cam noses on No. 1 cylinder (engine front side of right bank) are located as shown in the fig-
ure.

If not, turn crankshaft one revolution (360 degrees) and align
as shown in the figure.
NOTE:
When only timing chain (primary) is removed, rocker cover does
not need to be removed. To make sure that No. 1 cylinder is at
its compression TDC, remove front timing chain case first. Then
check mating marks on camshaft sprockets. Refer to EM-72,
"INSTALLATION" .
19. Remove crankshaft pulley as follows:
a. Remove rear cover plate (2WD) or starter motor (AWD) and set ring gear stopper (SST) as shown in the figure. Refer to SC-8,
"STARTING SYSTEM" .
PBIC2631E
KBIA1717J
SEM418G
PBIC1098E

TIMING CHAIN EM-65
[VQ35DE]
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Revision: 2006 December 2006 FX35/FX45
Removal and InstallationNBS003GP
NOTE:

This section describes procedures for removing/installing front timing chain case and timing chain related
parts, and rear timing chain case, when oil pan (upper) needs to be removed/installed for engine overhaul,
etc.

To remove/install front timing chain case, timing chain, and its related parts without removing oil pan
(upper), refer to EM-54, "
FRONT TIMING CHAIN CASE" .
REMOVAL
1. Remove front tire.
2. Disconnect negative battery terminal.
3. Remove engine cover with power tool. Refer to EM-19, "
INTAKE MANIFOLD COLLECTOR" .
4. Remove air cleaner case assembly. Refer to EM-17, "
AIR CLEANER AND AIR DUCT" .
5. Remove front and rear engine undercover with power tool.
6. Release the fuel pressure. Refer to EC-86, "
FUEL PRESSURE RELEASE" .
7. Drain engine coolant from radiator. Refer to CO-11, "
Changing Engine Coolant" .
CAUTION:

Perform this step when the engine is cold.

Do not spill engine coolant on drive belts.
8. Drain engine oil. Refer to LU-9, "
Changing Engine Oil" .
CAUTION:

Perform this step when the engine is cold.

Do not spill engine oil on drive belts.
9. Remove engine harnesses.
10. Remove intake manifold collectors (upper and lower). Refer to EM-19, "
INTAKE MANIFOLD COLLEC-
TOR" .
11. Remove radiator cooling fan assembly. Refer to CO-21, "
COOLING FAN" .
12. Remove drive belts. Refer to EM-15, "
DRIVE BELTS" .
13. Remove A/C compressor from bracket with piping connected, and temporarily secure it aside. Refer to ATC-139, "
Components" .
14. Remove power steering oil pump from bracket with piping connected, and temporarily secure it aside. Refer to PS-29, "
POWER STEERING OIL PUMP" .
15. Remove power steering oil pump bracket. Refer to PS-29, "
POWER STEERING OIL PUMP" .
16. Remove alternator. Refer to SC-20, "
CHARGING SYSTEM" .
17. Remove water bypass hose, water hose clamp and idler pulley bracket from front timing chain case.
18. Remove intake valve timing control covers.
1. Timing chain tensioner (secondary) 2. Internal chain guide 3. Timing chain tensioner (secondary)
4. Camshaft sprocket (EXH) 5. Timing chain (secondary) 6. Timing chain (primary)
7. Camshaft sprocket (INT) 8. Camshaft sprocket (EXH) 9. Timing chain (secondary)
10. Camshaft sprocket (INT) 11. Slack guide 12. Crankshaft sprocket
13. Timing chain tensioner (primary) 14. Intake valve timing control cover 15. Collared O-ring
16. O-ring 17. Chain tensioner cover 18. Intake valve timing control cover
19. Water hose clamp 20. Idler pulley bracket 21. Idler pulley
22. Crankshaft pulley 23. Front oil seal 24. Idler pulley
25. A/C compressor bracket 26. Water pump cover 27. Bracket
28. Front timing chain case 29. Bracket 30. Rear timing chain case
31. O-ring 32. Tension guide 33. Water drain plug (front side)

EM-66
[VQ35DE]
TIMING CHAIN
Revision: 2006 December 2006 FX35/FX45

Loosen mounting bolts in reverse order as shown in the fig-
ure.

U s e t h e s e a l c u t t e r [ S S T: K V 1 0 1111 0 0 ( J 3 7 2 2 8 ) ] t o c u t l i q u i d
gasket for removal.
CAUTION:
Shaft is internally jointed with camshaft sprocket (INT) cen-
ter hole. When removing, keep it horizontal until it is com-
pletely disconnected.
19. Remove collared O-ring from front timing chain case (left and right side).
20. Remove rocker covers (right and left). Refer to EM-51, "
ROCKER COVER" .
21. Remove oil pans (lower and upper). Refer to EM-30, "
OIL PAN AND OIL STRAINER" .
22. Obtain No. 1 cylinder at TDC of its compression stroke as follows:
a. Rotate crankshaft pulley clockwise to align timing mark (grooved line without color) with timing indicator.
b. Make sure that intake and exhaust cam noses on No. 1 cylinder (engine front side of right bank) are located as shown in the fig-
ure.

If not, turn crankshaft one revolution (360 degrees) and align
as shown in the figure.
23. Remove crankshaft pulley as follows:
SEM728G
PBIC2631E
KBIA1717J
SEM418G

TIMING CHAIN EM-69
[VQ35DE]
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Revision: 2006 December 2006 FX35/FX45
29. Remove internal chain guide, tension guide and slack guide. NOTE:
Tension guide can be removed after removing timing chain (pri-
mary).
30. Remove timing chain (primary) and crankshaft sprocket. CAUTION:
After removing timing chain (primary), do not turn crankshaft and camshaft separately, or valves
will strike the piston heads.
31. Remove timing chain (secondary) and camshaft sprockets as follows:
a. Attach suitable stopper pin to the right and left timing chain ten- sioners (secondary).
NOTE:

Use approximately 0.5 mm (0.020 in) dia. hard metal pin as a
stopper pin.

For removal of timing chain tensioner (secondary), refer to
EM-83, "
CAMSHAFT" . [Removing camshaft bracket (No. 1)
is required.]
b. Remove camshaft sprocket (INT and EXH) mounting bolts.

Secure the hexagonal portion of camshaft using a wrench to
loosen mounting bolts.
CAUTION:
Do not loosen the mounting bolts with securing anything
other than the camshaft hexagonal portion or with ten-
sioning the timing chain.
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
PBIC2047E
KBIA1698J

TIMING CHAIN EM-75
[VQ35DE]
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Revision: 2006 December 2006 FX35/FX45
g. After installing rear timing chain case, check the surface height difference between the following parts on the oil pan (upper)
mounting surface.

If not within the standard, repeat the installation procedure.
3. Install water pump with new O-rings. Refer to CO-22, "
WATER PUMP" .
4. Make sure that dowel pin hole, dowel pin and crankshaft key are located as shown in the figure. (No. 1 cylinder at compression
TDC)
NOTE:
Though camshaft does not stop at the 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).
5. Install timing chains (secondary) and camshaft sprockets as follows:
CAUTION:
Mating marks between timing chain and sprockets slip easily. Confirm all mating mark positions
repeatedly during the installation process.
a. Push plunger of timing chain tensioner (secondary) and keep it pressed in with a stopper pin. Standard
Rear timing chain case to cylinder block: –0.24 to 0.14 mm (–0.009 to 0.006 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

EM-76
[VQ35DE]
TIMING CHAIN
Revision: 2006 December 2006 FX35/FX45
b. Install timing chains (secondary) and camshaft sprockets.

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

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

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 camshafts with the groove
and dowel pin on sprockets, and install them.

On the intake side, align pin hole on the small diameter side of
the 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 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.
c. 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.
PBIC2981E
PBIC0891E
KBIA1698J