engine INFINITI FX35 2006 Service Manual

TIMING CHAIN EM-65
[VQ35DE]
C
D E
F
G H
I
J
K L
M A
EM
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-73
[VQ35DE]
C
D E
F
G H
I
J
K L
M A
EM
Revision: 2006 December 2006 FX35/FX45
1. Install timing chain tensioners (secondary) to cylinder head as follows if removed. Refer to EM-88,
"INSTALLATION" .
a. Install timing chain tensioners (secondary) with a stopper pin attached and new O-rings.
b. Install camshaft brackets (No. 1). Refer to EM-88, "
INSTALLATION" .
2. Install rear timing chain case as follows:
a. Install new O-rings onto cylinder block.
b. Install new O-rings to cylinder head.
c. Apply liquid gasket with the tube presser [SST: WS39930000 ( — )] to rear timing chain case back side as shown in the figure.
Use Genuine RTV Silicone Sealant or equivalent. Refer to GI-48, "
RECOMMENDED CHEMICAL
PRODUCTS AND SEALANTS" .
CAUTION:

For “A” in the figure, completely wipe out liquid gasket extended on a portion touching at
engine coolant.
PBIC0788E
SBIA0496E

TIMING CHAIN EM-77
[VQ35DE]
C
D E
F
G H
I
J
K L
M A
EM
Revision: 2006 December 2006 FX35/FX45
d. Pull stopper pins out from timing chain tensioners (secondary).
6. Install tension guide.
7. Install timing chain (primary) as follows:
a. Install crankshaft sprocket.

Make sure the mating marks on crankshaft sprocket face the
front of the engine.
b. Install timing chain (primary).

Install timing chain (primary) so the mating mark (punched) on
camshaft sprocket is aligned with the pink link on timing
chain, while the mating mark (notched) on crankshaft
sprocket is aligned with the orange one on timing chain, as
shown in the figure.

When it is difficult to align mating marks of timing chain (pri-
mary) with each sprocket, gradually turn camshaft using
wrench on the hexagonal portion to align it with the mating
marks.

During alignment, be careful to prevent dislocation of mating
mark alignments of timing chains (secondary).
PBIC2110E
SEM929E
PBIC3494E

TIMING CHAIN EM-79
[VQ35DE]
C
D E
F
G H
I
J
K L
M A
EM
Revision: 2006 December 2006 FX35/FX45
e. Install timing chain tensioner (primary).

Remove any dirt and foreign materials completely from the
back and the mounting surfaces of timing chain tensioner (pri-
mary).
f. Pull out stopper pin after installing, and then release plunger.
10. Make sure again that the mating marks on sprockets and timing chain have not slipped out of alignment.
11. Install new O-rings on rear timing chain case.
12. Install new front oil seal on front timing chain case.

Apply new engine oil to both oil seal lip and dust seal lip.

Install it so that each seal lip is oriented as shown in the fig-
ure.

Using a suitable drift [outer diameter: 60 mm (2.36 in)], press-
fit oil seal until it becomes flush with front timing chain case
end face.

Make sure the garter spring is in position and seal lip is not
inverted.
13. Install water pump cover and chain tensioner cover to front timing chain case.
PBIC3569E
PBIC2548E
SEM715A
PBIC0790E

EM-82
[VQ35DE]
TIMING CHAIN
Revision: 2006 December 2006 FX35/FX45
c. Tighten crankshaft pulley bolt.
d. Turn crankshaft pulley bolt 90 degree clockwise (angle tighten- ing).
CAUTION:
Check the tightening angle by using the angle wrench
[SST]. Avoid judgement by visual inspection without SST.

Check tightening angle indicated on the angle wrench indica-
tor plate.
e. Rotate crankshaft pulley in normal direction (clockwise when viewed from front) to confirm it turns smoothly.
19. For the following operations, perform steps in the reverse order of removal.
INSPECTION AFTER INSTALLATION
Inspection for Leaks
The following are procedures for checking fluids leak, lubricates leak.

Before starting engine, check oil/fluid levels including engine coolant and engine oil. If less than required
quantity, fill to the specified level. Refer to GI-48, "
RECOMMENDED CHEMICAL PRODUCTS AND
SEALANTS" .

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
leakage 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 chain tensioner drops after removal/installation, slack in guide may generate a
pounding noise during and just after the engine start. However, this does not indicate an unusualness.
Noise will stop after hydraulic pressure rises.

Warm up engine thoroughly to make sure there is no leakage 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.
: 44.1 N·m (4.5 kg-m, 33 ft-lb)
PBIC3821E
Item 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

EM-92
[VQ35DE]
CAMSHAFT
Revision: 2006 December 2006 FX35/FX45
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-II and it is directed according to inspection procedure of EC section. Refer to EC-122,
"SELF-DIAG RESULTS MODE" .

Check when engine ins cold so as to prevent burns from any splashing engine oil.
1. Check the engine oil level. Refer to LU-7, "
ENGINE OIL" .
2. Perform the following procedure so as to prevent the engine from being unintentionally started while checking.
a. Release fuel pressure. Refer to EC-86, "
FUEL PRESSURE RELEASE" .
b. Disconnect ignition coil and injector harness connectors.
3. Remove intake valve timing control solenoid valve. Refer to EM-83, "
CAMSHAFT" .
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 intake 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-5, "
LUBRICATION SYSTEM" .
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-5, "LUBRICATION SYSTEM" .
6. After inspection, install removed parts.
Inspection for Leaks
The following are procedures for checking fluids leak, lubricates leak.

Before starting engine, check oil/fluid levels including engine coolant and engine oil. If less than required
quantity, fill to the specified level. Refer to MA-12, "
RECOMMENDED 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
leakage 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 leakage 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.
PBIC2869E

CAMSHAFT EM-93
[VQ35DE]
C
D E
F
G H
I
J
K L
M A
EM
Revision: 2006 December 2006 FX35/FX45
Summary of the inspection items:
* Transmission/transaxle/CVT fluid. power steering fluid, brake fluid, etc.
Va l v e C l e a r a n c eNBS003GS
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.
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, "
ROCKER COVER" .
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 cylin-
der (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.
Item 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
SEM713A
KBIA1717J
SEM418G

EM-94
[VQ35DE]
CAMSHAFT
Revision: 2006 December 2006 FX35/FX45
b. Use a feeler gauge, measure the clearance between valve lifter and camshaft.
Valve clearance:
Unit: mm (in)
*: Approximately 80 °C (176 °F)

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 viewed from engine front) to align No. 3 cylinder at TDC of its compression
stroke.
NOTE:
Crankshaft pulley mounting bolt flange has a stamped line every
60 degrees. They can be used as a guide to rotation angle.
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)
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
SEM751G

CAMSHAFT EM-95
[VQ35DE]
C
D E
F
G H
I
J
K L
M A
EM
Revision: 2006 December 2006 FX35/FX45

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.

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
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
SEM751G
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