Infiniti EX35. Manual - part 714

 

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Infiniti EX35. Manual - part 714

 

 

TIMING CHAIN

EM-55

< ON-VEHICLE REPAIR >

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a.

Remove lower mounting bolt (A).

b.

Loosen upper mounting bolt (B) slowly, and then turn timing
chain tensioner (primary) (1) on the upper mounting bolt so that
plunger (C) is fully expanded.
NOTE:
Even if plunger is fully expanded, it is not dropped from the body
of timing chain tensioner (primary).

c.

Remove upper mounting bolt, and then remove timing chain ten-
sioner (primary).

33. Remove internal chain guide (1), and slack guide (2).

34. Remove timing chain (primary) and crankshaft sprocket.

CAUTION:

After removing timing chain tensioner (primary), never turn crankshaft and camshaft separately, or
valves will strike the piston heads.

35. Remove timing chain (secondary) and camshaft sprockets as follows:

a.

Attach suitable stopper pin (2) to the timing chain tensioners
(secondary) (1).

NOTE:
• Use approximately 0.5 mm (0.02 in) dia. hard metal pin as a

stopper pin.

• For removal of timing chain tensioners (secondary), refer to

EM-67, "Exploded View"

. [Removing camshaft bracket (No. 1)

is required.]

b.

Remove camshaft sprocket mounting bolts (INT and EXH).

JPBIA1537ZZ

JPBIA0086ZZ

A

:  Bank  1

B

:  Bank  2

JPBIA0087ZZ

EM-56

< ON-VEHICLE REPAIR >

TIMING CHAIN

• Secure the hexagonal portion of camshaft using a wrench to

loosen mounting bolts.

c.

Remove timing chain (secondary) together with camshaft
sprockets.

CAUTION:

• Never loosen the mounting bolts with securing anything

other than the camshaft hexagonal portion or with ten-
sioning the timing chain.

• Never disassemble. [Never loosen bolts (A) and (B) as

shown in the figure.]

36. Remove timing chain tensioners (secondary) from cylinder head as follows, if necessary.

a.

Remove camshaft brackets (No. 1). Refer to 

EM-67, "Exploded View"

.

b.

Remove timing chain tensioners (secondary) with a stopper pin attached.

37. Use a scraper to remove all traces of old liquid gasket from front

and rear timing chain cases and oil pan (upper), and liquid gas-
ket mating surfaces.

CAUTION:

Be careful not to allow gasket fragments to enter oil pan.

38. Remove old liquid gasket from bolt hole and thread.

INSTALLATION

NOTE:
The below figure shows the relationship between the matching mark on each timing chain and that on the cor-
responding sprocket, with the components installed.

KBIA4379J

JPBIA0096ZZ

JPBIA0050ZZ

A

: Remove sticking old liquid gasket

B

: Bolt hole

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TIMING CHAIN

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1.

Install timing chain tensioners (secondary) to cylinder head as follows if removed. Refer to 

EM-50,

"Exploded View"

.

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 noses, it is generally accepted
camshaft is placed for the same direction of the figure.

3.

Install timing chains (secondary) and camshaft sprockets as follows:

CAUTION:

Matching marks between timing chain and sprockets slip easily. Confirm all matching mark posi-
tions repeatedly during the installation process.

1.

Internal chain guide

2.

Camshaft sprocket (INT)

3.

Timing chain (secondary)

4.

Camshaft sprocket (EXH)

5.

Timing chain tensioner (primary)

6.

Slack guide

7.

Timing chain (primary)

8.

Crankshaft sprocket

9.

Water pump

10. Timing chain tensioner (secondary)

A.

Matching mark [punched (back side)]

B.

Matching mark (yellow link)

C.

Matching mark (punched)

D.

Matching mark (orange link)

E.

Matching mark (notched)

F.

Crankshaft key

Camshaft dowel pin

: At cylinder head upper face side in each bank.

Crankshaft key

: At cylinder head side of bank 1.

JPBIA0066ZZ

JPBIA0094ZZ

EM-58

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TIMING CHAIN

a.

Push plunger of timing chain tensioner (secondary) and keep it
pressed in with a stopper pin (A).

b.

Install timing chains (secondary) and camshaft sprockets.
• Align the matching marks on timing chain (secondary) (orange

link) with the ones on intake and exhaust camshaft sprockets
(punched), and install them.

NOTE:
• Figure shows bank 1 (rear view).
• Matching marks for camshaft sprockets are on the back side

of camshaft sprockets (secondary).

• There are two types of matching marks, circle and oval

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

• Align dowel pin camshafts with the groove or dowel hole on sprockets, and install them.
• On the intake side, align dowel pin on camshaft front end with pin groove on the back side of camshaft

sprocket, and install them.

• On the exhaust side, align dowel pin on camshaft front end with pin hole on camshaft sprocket, and

install them.

• In case that positions of each matching mark and each dowel pin are not fit on matching 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.

• Check the matching marks (punched) (D) on each camshaft

sprocket are positioned on the matching marks (orange link)
(C) on timing chain (secondary).

NOTE:
Matching mark (punched) in the figure is for checking loose at
this step.

JPBIA0095ZZ

A

:  Camshaft  sprocket (INT) back face

B

: Orange link

C

: Matching mark (Circle)

D

: Matching mark (Oval)

E

: Dowel groove

F

: Matching mark (2 oval)

G

:  Camshaft  sprocket (EXH) back face

H

: Matching mark (2 circle)

I

: Dowel hole

J

: Timing chain (secondary)

Bank 1

: Use circle type.

Bank 2

: Use oval type.

A

:  Intake  side

B

: Exhaust side

JPBIA1791ZZ

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