Infiniti QX56 (Z62). Manual - part 658

EM-72

< REMOVAL AND INSTALLATION >

TIMING CHAIN

d.

Being careful not to move seal ring from the installation groove,
align dowel pins on front cover with dowel pin holes (C) to install
valve timing control covers.

e.

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

14. Install camshaft position sensor and valve timing control solenoid valve (RH and LH) to valve timing con-

trol cover, if removed.
• Be sure to tighten mounting bolts with flanges completely seated.

15. Install oil pan (upper). Refer to 

EM-57, "Exploded View"

.

16. Install oil pan (lower) and oil strainer. Refer to 

EM-54, "Exploded View"

.

17. Install water pump pulley. Refer to 

CO-18, "Exploded View"

.

18. Install crankshaft pulley. 

• Fix the crankshaft as instructed in the removal procedure. Refer to 

EM-96, "FRONT OIL SEAL :

Removal and Installation"

.

a.

Install crankshaft pulley, taking care not to damage front oil seal.

b.

Apply engine oil onto threaded parts of crankshaft pulley bolt and seating area.
• Lightly tapping its center with plastic hammer, insert crankshaft pulley.

CAUTION:

Never tap crankshaft pulley on the side surface where belt is installed (outer circumference).

c.

Tighten crankshaft pulley bolt.

d.

Put a paint mark (A) on crankshaft pulley (1) aligning with angle
mark (B) on crankshaft pulley bolt. 

e.

Tighten crankshaft pulley bolt (clockwise).

• Check the tightening angle by referencing to the notches. The

angle between two notches is 90 degrees.

19. Rotate crankshaft pulley in normal direction (clockwise when viewed from engine front) to confirm it turns

smoothly.

20. Install in the reverse order of removal.

Inspection

INFOID:0000000006289567

INSPECTION AFTER DISASSEMBLY

Timing Chain

A

:  Bank  2

B

:  Bank  1

JPBIA3476ZZ

: 205 N·m (21 kg-m, 151 ft-lb)

 Angle tightening: 90 degrees (c)

JPBIA2066ZZ

TIMING CHAIN

EM-73

< REMOVAL AND INSTALLATION >

C

D

E

F

G

H

I

J

K

L

M

A

EM

N

P

O

Check for cracks and any excessive wear at link plates and roller
links of timing chain. Replace timing chain if necessary.

INSPECTION AFTER ASSEMBLY

Inspection for Leakage

The following are procedures for checking fluid leakage, lubricant leakage.

• Before starting engine, check oil/fluid levels including engine coolant and engine oil. If any are less than the

required quantity, fill them to the specified level. Refer to 

MA-10, "Fluids and Lubricants"

.

• Follow the procedure below to check for fuel leakage.
- Turn ignition switch to the “ON” position (with engine stopped). With fuel pressure applied to fuel piping,

check for fuel leakage at connection points.

- Start engine. With engine speed increased, check again for fuel leakage at connection points.
• Run engine to check for unusual noise and vibration.

NOTE:
If hydraulic pressure inside chain tensioner drops after removal/installation, slack in guide may generate a
pounding noise during and just after the engine start. However, this does not indicate a malfunction. The
noise will stop after hydraulic pressure rises.

• Warm up engine thoroughly to check that there is no leakage of fuel, or any oil/fluids including engine oil and

engine coolant.

• Bleed air from lines and hoses of applicable lines, such as in cooling system.
• After cooling down engine, again check oil/fluid levels including engine oil and engine coolant. Refill them to

the specified level, if necessary.

Summary of the inspection items:

* Power steering fluid, brake fluid, etc.

A

:  Crack

B

:  Wear

JPBIA0091ZZ

Items

Before starting engine

Engine running

After engine stopped

Engine coolant

Level

Leakage

Level

Engine oil

Level

Leakage

Level

Transmission / 
transaxle fluid

AT & CVT Models

Leakage

Level / Leakage

Leakage

MT Models

Level / Leakage

Leakage

Level / Leakage

Other oils and fluids*

Level

Leakage

Level

Fuel

Leakage

Leakage

Leakage

EM-74

< REMOVAL AND INSTALLATION >

CAMSHAFT

CAMSHAFT

Exploded View

INFOID:0000000006289568

1.

VVEL actuator motor assembly 
(bank 2)

2.

Gasket

3.

VVEL actuator housing assembly 
(bank 2)

4.

Washer

5.

VVEL ladder assembly (bank 2)

6.

Exhaust camshaft (bank 2)

7.

Cylinder head (bank 2)

8.

Cylinder head (bank 1)

9.

Exhaust camshaft (bank 1)

10. VVEL ladder assembly (bank 1)

11.

VVEL actuator housing assembly 
(bank 1)

12. Gasket

13.

VVEL actuator motor assembly 
(bank 1)

14.

VVEL control shaft position sensor 
(bank 1)

15.

VVEL control shaft position sensor 
(bank 2)

A.

Comply with the installation proce-
dure when tightening. Refer to 

EM-

75, "Removal and Installation"

.

B.

View B

C.

View C

Refer to 

GI-4, "Components"

 for symbols in the figure.

JSBIA0403GB

CAMSHAFT

EM-75

< REMOVAL AND INSTALLATION >

C

D

E

F

G

H

I

J

K

L

M

A

EM

N

P

O

Removal and Installation

INFOID:0000000006289569

REMOVAL

CAUTION:

• Never loosen adjusting bolts (A), mounting bolts (black color) (B) of VVEL ladder assembly and

mounting bolts (C) of VVEL control shaft position sensor. If loosened, the stroke of cam lift becomes
out of adjustment. In such case, replacement of VVEL ladder assembly and cylinder head assembly
is required. 

• Never loosen the mounting bolts (C) of the VVEL control shaft position sensor. VVEL control shaft

position sensor mounting bolts are required to be loosened for adjustment only when using a new
VVEL ladder assembly. Refer to 

EC-150, "Work Procedure"

.

NOTE:
VVEL ladder assembly cannot be replaced as a single part, because it is machined together with cylinder
head assembly.
1.

Remove VVEL actuator motor assembly. Refer to 

EM-36, "Exploded View"

.

2.

Remove rocker covers (bank 1 and bank 2). Refer to 

EM-33, "Exploded View"

.

3.

Remove VVEL actuator housing assembly. Refer to 

EM-36, "Exploded View"

.

4.

Remove front cover, camshaft sprockets, and timing chains. Refer to 

EM-61, "Exploded View"

.

5.

Remove VVEL ladder assembly.

JPBIA3512ZZ

VVEL control shaft position sensor mounting bolt

: 7.0 N·m (0.71 kg-m, 62 in-lb)