Infiniti QX56 (Z62). Manual - part 656

 

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Infiniti QX56 (Z62). Manual - part 656

 

 

EM-64

< REMOVAL AND INSTALLATION >

TIMING CHAIN

24. Remove oil pump and oil pump drive spacer.

25. Remove front oil seal from front cover using suitable tool.

• Use screwdriver for removal.

CAUTION:

Be careful not to damage front cover.

26. Remove O-rings (1), (2), (3) from cylinder heads and cylinder

block.

27. Remove oil filter (for valve timing control solenoid valve), if necessary.

28. Remove timing chain tensioner cover from front cover, if necessary.

• Use seal cutter [SST: KV10111100 (J-37228)] to cut liquid gasket for removal.

29. Remove timing chain tensioner (bank 1) as per the following:

NOTE:
To remove timing chain and related parts, start with those on bank 1. The procedure for removing parts on
bank 2 is omitted because it is the same as that for bank 1. 

a.

Push both sides of spring (A) against spring tension, and then
press in plunger with a slack guide (2).

b.

Insert a stopper pin (A) into the body hole, and then fix it with the
plunger pushed in.

30. Remove high pressure fuel pump camshaft.
31. Remove tension guide and slack guide.

32. Remove exhaust camshaft sprocket as per the following:

• Secure the hexagonal portion of exhaust camshaft using a wrench to loosen mounting bolt.

33. Remove timing chain and crankshaft sprocket.

CAUTION:

After removing timing chain, never turn crankshaft and camshaft separately, or valves will strike
the piston head.

34. Remove intake camshaft sprocket as per the following:

JPBIA3473ZZ

1

: Timing chain tensioner (bank 1)

JPBIA2369ZZ

JPBIA2370ZZ

TIMING CHAIN

EM-65

< REMOVAL AND INSTALLATION >

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• Secure the hexagonal portion (located in between journal No.1

and journal No. 2) of drive shaft (A) using a wrench (B) to
loosen mounting bolt.

NOTE:
The figure shows an example of bank 2.

CAUTION:

• Never loosen the mounting bolt by securing anything other than the camshaft (drive shaft) hexago-

nal portion or with tensioning the timing chain.

• When holding the hexagonal part of camshaft (drive shaft) with a wrench, be careful not to allow the

wrench to cause interference with other parts.

• Never disassemble camshaft sprocket. [Never loosen bolts

(B) as shown in the figure.]

35. Use scraper to remove all traces of old liquid gasket from front cover and opposite mating surfaces.

• Remove old liquid gasket from bolt hole and thread.

INSTALLATION

: Engine front

JPBIA2302ZZ

A

:  Intake 

JPBIA3507ZZ

A

: Remove old liquid gasket that is stuck

B

: Bolt hole

JPBIA0051ZZ

EM-66

< REMOVAL AND INSTALLATION >

TIMING CHAIN

NOTE:
• The above figure shows the relationship between the matching 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. 

- Intake camshaft sprocket, exhaust camshaft sprocket
- Tension guide
- Slack guide
• To install timing chain and related parts, start with those on bank 2. The procedure for installing parts on

bank 1 is omitted because it is the same as that for installation on bank 2.

1.

High pressure fuel pump camshaft

2.

Intake camshaft sprocket (bank 2)

3.

Exhaust camshaft sprocket (bank 2)

4.

Timing chain (bank 2)

5.

Slack guide (bank 2)

6.

Chain oil jet (bank 2)

7.

Timing chain tensioner (bank 2)

8.

Crankshaft sprocket (bank 2 side)

9.

Crankshaft sprocket (bank 1 side)

10.

Chain oil jet (bank 1)

11. Tension guide (bank 1)

12.

Timing chain (bank 1)

13.

Exhaust camshaft sprocket (bank 1) 14. Intake camshaft sprocket (bank 1)

15.

Timing chain tensioner (bank 1)

16.

Slack guide (bank 1)

17. Tension guide (bank 2)

18.

Dowel pin

A:

Matching mark (copper link)

B:

Matching mark (punched)

C:

Matching mark (outer groove)

D:

Matching mark (white link)

E.

Matching mark (notched)

F.

Matching mark (yellow link)

G.

Crankshaft key

JPBIA3482ZZ

TIMING CHAIN

EM-67

< REMOVAL AND INSTALLATION >

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1.

Check that crankshaft key (1) and dowel pin (A) of each cam-
shaft are located as shown in the figure.

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 (INT and EXH).
• Install onto correct side by checking with identification mark

(A) on surface.

Exhaust side:

• Secure the hexagonal portion of exhaust camshaft using a wrench to tighten mounting bolt. Refer to

EM-74, "Exploded View"

.

Intake side:

• Secure the hexagonal portion (located in between journal No.1

and journal No. 2) of drive shaft (A) using a wrench (B) to
tighten mounting bolt. Refer to 

EM-74, "Exploded View"

.

NOTE:
The figure shows an example of bank 2.

3.

Install high pressure fuel pump camshaft.

4.

Install timing chains as per the following:

a.

Install crankshaft sprockets for both banks.
• Install each crankshaft sprocket so that its flange side (the

larger diameter side without teeth) (A) 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

: Straight up 

JPBIA2109ZZ

JPBIA2110ZZ

: Engine front

JPBIA2302ZZ

1

: Crankshaft sprocket (bank 1 side)

2

: Crankshaft sprocket (bank 2 side)

JPBIA3542ZZ

 

 

 

 

 

 

 

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