Nissan Murano Z51. Manual - part 648

EM-64

< REMOVAL AND INSTALLATION >

TIMING CHAIN

2.

Check that dowel pin (A) and crankshaft key (1) 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. Never misidentify (ignore big
dia. side).

3.

Install timing chain (secondary) and camshaft sprockets (INT and EXH) 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 stopper pin (A).

b.

Install timing chain (secondary) (1) and camshaft sprockets (INT
and EXH).

NOTE:
Figure shows bank 1 (rear view).
• Align the mating marks on timing chain (secondary) (orange

link) with the ones on camshaft sprockets (INT and EXH)
(punched), and install them.
NOTE:
• Mating marks for camshaft sprocket (INT) are on the back

side of camshaft sprocket (secondary).

• There are two types of mating mark, circle and oval types.

They should be used for the bank 1 and bank 2, respectively.

• Align dowel pin on camshafts with the groove or hole on sprockets, and install them.

Camshaft dowel pin

: At cylinder head upper face side in each bank

Crankshaft key

: At cylinder head side of bank 1

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A

: Camshaft sprocket (INT) back face

B

: Orange link

C

: Mating mark (Circle)

D

: Camshaft sprocket (EXH) back face

E

: Mating mark (2 circle on front face)

F

: Dowel pin groove

G

: Mating mark (2 ovals on front face)

H

: Mating mark (Oval)

I

: Dowel pin hole

Bank 1

: Use circle type.

Bank 2

: Use oval type.

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TIMING CHAIN

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< REMOVAL AND INSTALLATION >

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• On the intake side, align dowel pin on the camshaft front end with dowel pin hole on the back side of

camshaft sprocket, and install them.

• On the exhaust side, align dowel pin on camshaft front end with dowel 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 eas-
ier, make a mating mark (A) 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 wrench at the hexagonal portion to

tighten mounting bolts.

d.

Pull stopper pins (B) out from timing chain tensioners (second-
ary) (1).

4.

Install tension guide.

5.

Install timing chain (primary) as follows:

a.

Install crankshaft sprocket (1).

• Check the mating marks on crankshaft sprocket face the front

of the engine.

b.

Install timing chain (primary).

B

: Mating mark (orange link)

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A

:  Bank  1

C

:  Bank  2

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: Crankshaft side

B

: Engine front

C

: Mating mark (front side)

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EM-66

< REMOVAL AND INSTALLATION >

TIMING CHAIN

• Install timing chain (primary) so the mating mark (punched) (B)

on camshaft sprocket (INT) (1) is aligned with the pink link (A)
on timing chain, while the mating mark (notched) (C) on crank-
shaft sprocket (2) is aligned with the orange link (D) 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).

6.

Install internal chain guide (1) and slack guide (2).

CAUTION:

Never over tighten slack guide mounting bolt (2). It is nor-
mal for a gap (A) to exist under the bolt seat when mounting
bolt is tightened to specification.

3

:  Water  pump

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: Tension guide

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: Slack guide

3

: Cylinder block

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TIMING CHAIN

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< REMOVAL AND INSTALLATION >

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7.

Install the timing chain tensioner (primary) with the following procedure:

a.

Pull plunger stopper tab (A) up (or turn lever downward) so as to
remove plunger stopper tab from the ratchet of plunger (D).
NOTE:
Plunger stopper tab and lever (C) are synchronized.

b.

Push plunger into the inside of tensioner body.

c.

Hold plunger in the fully compressed position by engaging
plunger stopper tab with the tip of ratchet.

d.

To secure lever, insert stopper pin (E) through hole of lever into
tensioner body hole (B).
• The lever parts and the tab are synchronized. Therefore, the

plunger will be secured under this condition.

NOTE:
Figure shows the example of 1.2 mm (0.047 in) diameter thin screwdriver being used as the stopper pin.

e.

Install timing chain tensioner (primary) (1).
• 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 (A) after installing, and then release plunger.

8.

Check again that the mating marks on each sprocket and each timing chain have not slipped out of align-
ment.

9.

Install new O-rings (1) on rear timing chain case.

10. 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 figure. 

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A

:  Bank  1

B

:  Bank  2

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A

:  Oil  seal  lip

B

: Dust seal lip

: Engine inside

: Engine outside

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