Infiniti FX35, FX50 (S51). Manual - part 980

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TIMING CHAIN

b.

Install timing chains.

Bank 2 (F):

• Install timing chain so that the matching mark (outer groove)

(B) on camshaft sprocket is aligned with the copper link (A) on
timing chain, while the matching mark (punched) (C) on crank-
shaft sprocket is aligned with the yellow link (D) one on timing
chain, as shown in the figure.

Bank 1 (G):

• Install timing chain so that the matching mark (outer groove)

(B) on camshaft sprocket is aligned with the copper link (A) on
timing chain, while the matching mark (notched) (E) on crank-
shaft sprocket is aligned with the yellow link (D) one on timing
chain, as shown in the figure.

4.

Install slack guides and tension guides onto correct side by
checking with identification mark (A) on surface.

CAUTION:

Never overtighten slack guide mounting bolt (2). It is nor-
mal for a gap (A) to exist under the bolt seats when mount-
ing bolt are tightened to the specification.

5.

Install timing chain tensioner as per the following:

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1

: Slack guide (bank 2)

2

: Tension guide (bank 2)

3

: Slack guide (bank 1)

4

: Tension guide (bank 1)

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1

: Slack guide

3

: Cylinder block

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a.

Fix the plunger at the most compressed position using a stopper
pin (A).
• Remove any dirt and foreign materials completely from the

back and the mounting surfaces of timing chain tensioner.

b.

Pull out stopper pin after installing, and then release plunger.

6.

Check again that the matching marks on sprockets and timing chain have not slipped out of alignment.

7.

Install oil pump drive chain as per the following:

a.

Install oil pump drive chain tensioner.
• Fix the tensioner at the most compressed position using a stopper pin. and then install it.

b.

Install the oil pump sprocket (crankshaft side), oil pump sprocket (oil pump side) and oil pump drive chain
at the same time.
• Install each oil pump sprocket so that its flange side (the larger

diameter side without teeth) (A) faces in the direction shown in
the figure.

NOTE:
There is no matching mark in the oil pump related parts.

c.

Hold the two flat parts of oil pump shaft, and then tighten the oil
pump sprocket (oil pump side) nut.

CAUTION:

Secure the oil pump shaft with the two flat parts.

d.

Securely pull out the stopper pin (A) after installing the oil pump
drive chain.
• Check that the tension is applied to the oil pump drive chain

(1)  after installing.

8.

Install front oil seal on front cover. Refer to .

EM-194, "FRONT OIL SEAL : Removal and Installation"

.

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1

: Oil pump sprocket (crankshaft side)

2

: Oil pump sprocket (oil pump side)

3

:  Oil  pump

4

: Crankshaft

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: Oil pump sprocket (oil pump side)

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TIMING CHAIN

9.

Install timing chain tensioner cover (2) to front cover (1).

• 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 Sealant or an equivalent. Refer
to 

GI-16, "Recommended Chemical Products and Seal-

ants"

.

10. Install oil filter (for valve timing control solenoid valve) (1) in the

direction shown in the figure, if removed.
• Check that the oil filter does not protrude from the upper sur-

face of front cover (2) after installation.

11. Install front cover as per the following:

a.

Install new O-ring (1), (2) onto cylinder heads and cylinder block.

a

: 

φ

3.4 - 4.4 mm (0.134 - 0.173 in)

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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 Sealant or equivalent. Refer to

GI-16, "Recommended Chemical Products and Sealants"

.

c.

Check again that the matching marks on timing chain and that
on each sprocket are aligned. Then, install front cover.

CAUTION:

Be careful not to damage front oil seal by interference with
front end of crankshaft.

d.

Tighten mounting bolts in numerical order as shown in the fig-
ure.

• There are three types of mounting bolts.

e.

After all mounting bolts are tightened, retighten them in numerical order as shown in the figure.

CAUTION:

Be sure to wipe out any excessive liquid gasket leaking onto surface mating with oil pan.

12. Install valve timing control cover as per the following:

A

: Junction between cylinder block and cylinder head

B

:  Protrusion

c

: 4.3 - 5.3 mm (0.169 - 0.209 in)

d

: 

φ

3.4 - 4.4 mm (0.134 - 0.173 in)

e

: 

φ

4.0 - 5.6 mm (0.157 - 0.220 in)

f

: 

φ

4.8 - 5.8 mm (0.189 - 0.228 in)

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A : 20 mm (0.79 in)

B : 45 mm (1.77 in)

C : 80 mm (3.15 in)

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