Timing chain INFINITI FX35 2006 Repair Manual

EM-126
[VQ35DE]
CYLINDER BLOCK
Revision: 2006 December 2006 FX35/FX45
6. Drain engine coolant by removing water drain plugs from cylin- der block both sides at “B” and “C” and cylinder block front side
at “A” as shown in the figure.
7. Remove drive plate with power tool. Fix crankshaft with a ring gear stopper [SST: KV1011770 (J44716)], and remove mounting bolts.

Loosen mounting bolts in diagonal order.
CAUTION:

Do not disassemble drive plate.

Never place drive plate with signal plate facing down.

When handling signal plate, take care not to damage or
scratch it.

Handle signal plate in a manner that prevents it from
becoming magnetized.
8. Remove the following parts:

Intake manifold collector; Refer to EM-19, "INTAKE MANIFOLD COLLECTOR" .

Intake manifold; Refer to EM-24, "INTAKE MANIFOLD" .

Oil pans (lower and upper); Refer to EM-30, "OIL PAN AND OIL STRAINER" .

Front and rear timing chain case; Refer to EM-64, "TIMING CHAIN" .

Cylinder head; Refer to EM-101, "CYLINDER HEAD" .
9. Remove knock sensor.
CAUTION:
Carefully handle sensor avoiding shocks.
PBIC2610E
SEM760G

EM-172
[VK45DE]
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
Revision: 2006 December 2006 FX35/FX45
Use the Chart Below to Help You Find the Cause of the Symptom.NBS003HL
1. Locate the area where noise occurs.
2. Confirm the type of noise.
3. Specify the operating condition of engine.
4. Check specified noise source.
If necessary, repair or replace these parts.
A: Closely related B: Related C: Sometimes related —: Not related Location
of noise Type of
noise Operating condition of engine
Source of noise Check item Refer-
ence page
Before
warm- up After
warm- up When
start- ing When
idling When
racing While
driving
Top of
engine
Rocker
cover
Cylinder
head Ticking or
clicking C A — A B — Tappet noise Valve clearance
EM-222
Rattle C A — A B C Camshaft
bearing noise Camshaft journal oil
clearance
Camshaft runout EM-217EM-216
Crank-
shaft pul-
ley
Cylinder
block
(Side of
engine)
Oil pan Slap or
knock —A—B B— Piston pin
noise Piston to piston pin oil
clearance
Connecting rod bush-
ing oil clearance EM-265
EM-267
Slap or
rap A——B B A Piston slap
noise Piston to cylinder bore
clearance
Piston ring side clear-
ance
Piston ring end gap
Connecting rod bend
and torsion EM-269EM-266
EM-266
EM-267
Knock A B C B B B
Connecting
rod bearing
noise Connecting rod bush-
ing oil clearance
Connecting rod bear-
ing oil clearance EM-267EM-272
Knock A B — A B C
Main bearing
noise Main bearing oil clear-
ance
Crankshaft runout EM-273EM-271
Front of
engine
front cover Tapping or
ticking AA—BBB Timing chain
and chain
tensioner
noise Timing chain cracks
and wear
Timing chain tensioner
operation EM-208
EM-203
Front of
engine Squeak-
ing or fizz-
ing AB—B—C Drive belts
(Sticking or
slipping) Drive belts deflection
EM-174CreakingA BAB A B Drive belts
(Slipping) Idler pulley bearing
operation
Squall
Creak AB—BAB Water pump
noise Water pump operation CO-51,
"WATER
PUMP"

TIMING CHAIN EM-203
[VK45DE]
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Revision: 2006 December 2006 FX35/FX45
TIMING CHAINPFP:13028
ComponentsNBS003IB
PBIC4570E

EM-204
[VK45DE]
TIMING CHAIN
Revision: 2006 December 2006 FX35/FX45

Refer to GI-11, "Components" for symbol marks in the figure.
Removal and InstallationNBS003IC
REMOVAL
1. Remove engine assembly from vehicle. Refer to EM-243, "ENGINE ASSEMBLY" .
2. Remove the following components and related parts:

Drive belt auto tensioner and idler pulley; Refer to EM-176, "Drive Belt Auto Tensioner and Idler Pulley"
.

Thermostat housing and hoses; Refer to CO-53, "THERMOSTAT AND WATER CONTROL VALVE" .

Ignition coil; Refer to EM-191, "IGNITION COIL" .

Rocker cover; Refer to EM-200, "ROCKER COVER" .
3. If necessary, remove intake valve timing control position sensor (right and left bank) and camshaft position sensor (PHASE) from
intake valve timing control cover and front cover.
CAUTION:

Handle carefully to avoid dropping and shocks.

Do not disassemble.
4. If necessary, remove intake valve timing control solenoid valve from intake valve timing control cover. CAUTION:

Handle components and parts 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.
1. Camshaft sprocket (EXH) 2. Camshaft sprocket (INT) 3. Camshaft sprocket (INT)
4. Camshaft sprocket (EXH) 5. Front cover 6. Intake valve timing control solenoid
valve (right bank)
7. O-ring 8. Seal ring 9. Intake valve timing control position
sensor (right bank)
10. O-ring 11. Intake valve timing control cover
(right bank) 12.Intake valve timing control position
sensor (left bank)
13. O-ring 14. Intake valve timing control cover (left
bank) 15. Seal ring
16. Intake valve timing control solenoid
valve (left bank) 17. O-ring 18. Oil level gauge
19. Oil level gauge guide 20. O-ring 21. Crankshaft pulley bolt
22. Crankshaft pulley 23. Front oil seal 24. Chain tensioner cover
25. Camshaft position sensor (PHASE) 26. O-ring 27. Oil pump drive spacer
28. Oil pump assembly 29. Crankshaft sprocket 30. O-ring
31. O-ring 32. Timing chain tension guide
(right bank) 33.
Timing chain slack guide
(right bank)
34. Timing chain (right bank) 35. Timing chain (left bank) 36. Chain tensioner (left bank)
37. Chain tensioner (right bank) 38. Timing chain slack guide
(left bank) 39.
Timing chain tension guide
(left bank)
40. O-ring
A. Refer to EM-208
.
PBIC0050E

TIMING CHAIN EM-205
[VK45DE]
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Revision: 2006 December 2006 FX35/FX45
5. Remove intake valve timing control cover as follows:
a. Loosen and remove mounting bolts in the reverse order as shown in the figure.
b . U s 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 g a s k e t for removal.
CAUTION:

Exercise care not to damage mating surfaces.

Pull out cover keeping levelness without an angle, as
inner part of cover is engaged with the center of camshaft
sprocket (INT).
6. Remove O-rings from front cover.
7. Obtain No. 1 cylinder at TDC of its compression stroke as follows:
a. Rotate crankshaft pulley clockwise to align the TDC identifica- tion notch (without paint mark) with timing indicator on front
cover.
b. Make sure that both intake and exhaust cam noses of No. 1 cyl- inder (engine front side of left bank) are located as shown in the
figure.

If not, turn crankshaft one revolution (360 degrees) and align
as shown in the figure.
8. Remove crankshaft pulley as follows:
PBIC0051E
SBIA0374E
PBIC2341E
KBIA0400J

EM-206
[VK45DE]
TIMING CHAIN
Revision: 2006 December 2006 FX35/FX45
a. Remove rear plate cover, and set ring gear stopper (SST).
b. Loosen crankshaft pulley bolt, and then pull crankshaft pulley with both hands to remove it.
CAUTION:

Do not remove crankshaft pulley bolt. Keep loosened
crankshaft pulley bolt in place to protect removed crank-
shaft pulley from dropping.

Do not remove balance weight (inner hexagon bolt) at the
front of crankshaft pulley.
9. Remove oil pan and oil strainer. Refer to EM-187, "
OIL PAN AND OIL STRAINER" .
10. Remove front cover as follows:
a. Loosen mounting bolts in reverse order as shown in the figure.
b . U s 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 g a s k e t for removal.
CAUTION:

Exercise care not to damage mating surfaces.

After removal, handle front cover carefully so it does not
tilt, cant, or warp under a load.
11. Remove front oil seal from front cover using suitable tool.

Use screwdriver for removal.
CAUTION:
Be careful not to damage front cover.
12. Remove O-rings from cylinder heads (right and left bank) and cylinder block.
13. Remove chain tensioner cover from front cover.

Use seal cutter [SST: KV10111100 (J37228)] to cut liquid gasket for remove.
14. Remove oil pump drive spacer.

Set bolts in the two bolt holes [M6 × pitch 1.0 mm (0.04 in)] on
front surface. Using suitable puller, pull oil pump drive spacer
off from crankshaft.
NOTE:
The dimension between the centers of the two bolt holes is 33
mm (1.30 in).
In the figure, a commercial steering puller is used.
15. Remove oil pump. Refer to LU-31, "
OIL PUMP" .
16. Remove chain tensioner (left bank) as follows:
PBIC1656E
KBIA0354J
SBIA0373E
PBIC2342E

TIMING CHAIN EM-207
[VK45DE]
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Revision: 2006 December 2006 FX35/FX45
NOTE:
To remove timing chain and related parts, start with those on left bank. The procedure for removing parts
on right bank is omitted because it is the same as that for left bank.
a. Press tab in the direction of arrow (or turn lever in the direction of arrow) to unlock the locking with the groove that stops ten-
sioner plunger from returning.

Lightly press tensioner plunger to release the tension of
spring for this operation.
b. Push in tensioner plunger to align the hole on lever and that on pump main body.

Pushing in tensioner too far does not allow the holes to align.
Therefore, push in plunger to the degree at which the start of
stopper groove and tab engages.
c. Insert stopper pin [hard wire with approx. 0.5 mm (0.020 in) diameter or similar tool] to fix plunger. With plunger fixed, remove chain tensioner.
17. Remove chain tension guide and timing chain slack guide.
18. Remove timing chain and crankshaft sprocket.
CAUTION:
After removing timing chain, do not turn crankshaft and camshaft separately, or valves will strike
the piston head.
19. With hexagonal part of camshaft locked with wrench, loosen mounting bolts securing camshaft sprocket to remove camshaft
sprocket.
CAUTION:
Do not loosen mounting bolts with securing anything other
than the camshaft hexagonal portion or with tensioning the
timing chain.
20. Perform same procedure as for left bank, remove timing chain and related parts on right side.
21. Use scraper to remove all traces of old liquid gasket from front cover and opposite mating surfaces.

Remove oil liquid gasket from bolt hole and thread.
22. Use scraper to remove all trace of liquid gasket from chain tensioner cover and intake valve timing control covers.
PBIC2343E
PBIC0030E
PBIC2084E

EM-208
[VK45DE]
TIMING CHAIN
Revision: 2006 December 2006 FX35/FX45
INSPECTION AFTER REMOVAL
Timing Chain
Check for cracks and any excessive wear at link plates and roller
links of timing chain. Replace timing chain as necessary.
INSTALLATION
NOTE:

The above figure shows the relationship between the mating mark on each timing chain and that on the
corresponding sprocket, with the components installed.

Parts with an identification mark (R or L) should be installed on the corresponding bank according to the
mark.
Parts with an identification mark:
–Camshaft sprocket (INT)
–Dowel pin groove of camshaft sprocket (EXH) (camshaft sprocket is same part both banks)
–Chain tension guide
–Chain slack guide

To install timing chain and related parts, start with those on right bank. The procedure for installing parts
on left bank is omitted because it is the same as that for installation on right bank.
PBIC0282E
PBIC2344E

TIMING CHAIN EM-209
[VK45DE]
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Revision: 2006 December 2006 FX35/FX45
1. Make sure that crankshaft key and dowel pin of each camshaft are located as shown in the figure. (No. 1 cylinder at compres-
sion 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.
2. Install camshaft sprockets.

Install onto correct side by checking with identification mark
on surface.

Install camshaft sprocket (EXH) by selectively using the
groove of dowel pin according to the bank. (Common part
used for both banks.)

Lock the hexagonal part of camshaft in the same procedure
as for removal, and tighten mounting bolts.
3. Install crankshaft sprockets for both banks.

Install each crankshaft sprocket so that its flange side (the
larger diameter side without teeth) faces in the direction
shown in the figure.
NOTE:
The same parts are used but facing directions are different. Camshaft dowel pin
: At cylinder head upper face side in each bank
Crankshaft key : At cylinder head side of left bank
SBIA0356E
PBIC2345E
PBIC0057E

EM-210
[VK45DE]
TIMING CHAIN
Revision: 2006 December 2006 FX35/FX45
4. Install timing chains and related parts.

Align the mating mark on each sprocket and timing chain for installation.
NOTE:
Before installing chain tensioner, it is possible to change the position of mating mark on timing chain for
that on each sprocket for alignment.
CAUTION:
For the above reason, after the mating marks are aligned, keep them aligned by holding them
with a hand.

Install slack guides and tension guides onto correct side by checking with identification mark on sur-
face.

Install chain tensioner with plunger fixed as described in its removal.
CAUTION:

Before and after the installation of chain tensioner, make sure that the mating mark on timing
chain is not out of alignment.

After installing chain tensioner, remove stopper pin to release tensioner. Make sure tensioner
is released.

To avoid chain-link skipping of timing chain, do not move crankshaft or camshafts until front
cover is installed.
5. Perform the same procedure as for right bank, install timing chain and related parts on left side.
6. Install oil pump. Refer to LU-31, "
OIL PUMP" .
PBIC2344E