Timing chain INFINITI FX35 2008 Repair Manual

EM-202
< SERVICE INFORMATION >[VK45DE]
TIMING CHAIN
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 loosenedcrankshaft 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-183, "
Component".
10. Remove front cover as follows:
a. Loosen mounting bolts in reverse order as shown in the figure.
b. Use seal cutter [SST: KV10111100 (J37228)] to cut liquid gasket 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-29, "
Component".
16. Remove chain tensioner (left bank) as follows:
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TIMING CHAINEM-203
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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 springfor 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 cranksh aft 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 porti on 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.
INSPECTION AFTER REMOVAL
Timing Chain
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EM-204
< SERVICE INFORMATION >[VK45DE]
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 ma
ting mark on each timing chain and that on the cor-
responding 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 sa me as that for installation on right bank.
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TIMING CHAINEM-205
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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 onsurface.
 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 (thelarger 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
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EM-206
< SERVICE INFORMATION >[VK45DE]
TIMING CHAIN
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 ar e aligned, keep them aligned by holding them
with a hand.
 Install slack guides and tension guides onto correct si de by checking with identification mark on surface.
 Install chain tensioner with plunger fixed as described in its removal.
CAUTION:
 Before and after the installation of chain tens ioner, make sure that the mating mark on timing
chain is not out of alignment.
 After installing chain tensioner, remove stoppe r 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-29
.
7. Install oil pump drive spacer as follows:
a. Insert oil pump drive spacer according to the directions of crank- shaft key and the two flat surfaces of oil pump inner rotor.
 If the positional relationship does not allow the insertion, rotate
oil pump inner rotor with a finger to allow spacer.
b. After confirming that the position of each part is in correct condi- tion to allow for spacer, force fit spacer by lightly tapping with
plastic hammer until it contacts and does not go further.
8. Install front oil seal on front cover.  Apply new engine oil to both oil seal lip and dust seal lip.
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TIMING CHAINEM-207
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 Install it so that each seal lip is oriented as shown in the figure.
CAUTION:
Be careful not to scratch or make burrs on circumference
of oil seal.
 Using front oil seal drift (commerc ial service tool), press fit until
the height of front oil seal is level with the mounting surface.
 Make sure the garter spring is in position and seal lips not inverted.
9. Install chain tensioner cover to front cover.  Apply a continuous bead of liquid gasket with tube presser
(commercial service tool) to front cover as shown in the figure.
Use Genuine RTV Silicone Seal ant or equivalent. Refer to
GI-44, "
Recommended Chemical Product and Sealant".
10. Install front cover as follows:
a. Install new O-rings onto cyli nder heads (right and left bank) and
cylinder block.
SEM715A
Front oil seal drift
Outer diameter : 56 mm (2.20 in)
Inner diameter : 49 mm (1.93 in)
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EM-208
< SERVICE INFORMATION >[VK45DE]
TIMING CHAIN
b. Apply a continuous bead of liquid gasket with tube presser
(commercial service tool) to front cover as shown in the figure.
Use Genuine RTV Silicone Seal ant or equivalent. Refer to
GI-44, "
Recommended Chemical Product and Sealant".
c. make sure again that the mating marks on timing chain and that on each sprocket are aligned. Then, install front cover.
CAUTION:
Be careful to avoid interferen ce with the front end of oil
pump drive spacer. Such interf erence may damage front oil
seal.
d. Tighten mounting bolts in numerical order as shown in the fig- ure.
 There are four type mounting bolts.
e. After all mounting bolts are tightened, retighten t hem in numerical order as shown in the figure.
CAUTION:
Be sure to wipe off any excessive liquid gasket leaking onto surface mating with oil pan.
11. Install intake valve timing control cover as follows:
a. At the back of intake valve timing control cover, in stall new seal rings (three for each bank) to the area to
be inserted into camshaft sprocket (INT).
CAUTION:
Do not spread seal ring excessively to avoid breaks and deformation.
b. Install new O-rings on front cover.
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TIMING CHAINEM-209
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c. Apply a continuous bead of liquid gasket with tube presser
(commercial service tool) to intake valve timing control covers as
shown in the figure.
Use Genuine RTV Silicone Seal ant or equivalent. Refer to
GI-44, "
Recommended Chemical Product and Sealant".
d. Tighten mounting bolts in numerical order as shown in the fig- ure.
12. Install intake valve timing control position sensor, intake valve timing control solenoid valve and camshaft position sensor (PHASE) to intake valve timing control cover and front cover if removed.
 Be sure to tighten mounting bolts with flanges completely seated.
13. Install oil pan and oil strainer. Refer to EM-183, "
Component".
14. Install crankshaft pulley as follows:
a. Fix crankshaft with ring gear stopper [SST: J-45476].
b. Install crankshaft pulley, taking care not to damage front oil seal.  Install according to dowel pin of oil pump drive spacer.
 Lightly tapping its center with plastic hammer, insert pulley.CAUTION:
Do not tap pulley on the side surface where belt is installed (outer circumference).
c. Apply engine oil onto threaded parts of crankshaft pulley bolt and seating area.
d. Tighten crankshaft pulley bolt.
e. Put a paint mark on crankshaft pulley aligning with angle mark on crankshaft pulley bolt.
f. Further tighten by 90 degrees. (Angle tightening)  Check the tightening angle by referencing to the notches. Theangle between two notches is 90 degrees.
15. Rotate crankshaft pulley in normal direction (clockwise when viewed from engine front) to confirm it turns smoothly.
16. Install in the reverse order of removal after this step. NOTE:
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: 93.1 N·m (9.5 kg-m, 69 ft-lb)
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EM-210
< SERVICE INFORMATION >[VK45DE]
TIMING CHAIN
If hydraulic pressure inside timing chain tensioner drops after removal/installation, slack in guide may gen-
erate a pounding noise during and just after engine start. However, this does not indicate an unusualness.
Noise will stop after hydraulic pressure rises.
INSPECTION AFTER INSTALLATION
Inspection for Leaks
The followings are procedures for checking fluids leak, lubricates leak and exhaust gases 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, che ck again for fuel leakage at connection points.
 Run engine to check for unusual noise and vibration.
 Warm up engine thoroughly to make sure there is no leak age of fuel, exhaust gases, or any oil/fluids includ-
ing engine oil and engine coolant.
 Bleed air from lines and hoses of applic able 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. 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
Exhaust gases — Leakage —
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CAMSHAFTEM-211
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CAMSHAFT
ComponentINFOID:0000000001325790
 Refer to
GI-8, "Component" for symbols in the figure.
Removal and InstallationINFOID:0000000001325791
REMOVAL
1. Remove engine assembly from vehicle. Refer to EM-237, "Component".
2. Remove timing chain. Refer to EM-199, "
Component".
1. Cylinder head (right bank) 2. Camshaft bracket (No. 2 to 5) 3. Valve lifter
4. Camshaft bracket (No. 1) 5. Washer 6. Camshaft (EXH)
7. Camshaft sprocket (EXH) 8. Camshaf t sprocket (INT) 9. Camshaft (INT)
10. Bracket 11. Cylinder head (left bank) 12. Valve lifter
13. Camshaft (INT) 14. Camshaft sprocket (INT) 15. Camshaft sprocket (EXH)
16. Camshaft (EXH) 17. Camshaft bracket (No. 1) 18. Washer
19. Camshaft bracket (No. 2 to 5) 20. Camshaft bracket (No. 6)
A. Refer to EM-211
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