Infiniti QX56 (JA60). Manual - part 469

EM-30

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EXHAUST MANIFOLD AND THREE WAY CATALYST

EXHAUST MANIFOLD AND THREE WAY CATALYST

Exploded View

INFOID:0000000005148989

Removal and Installation

INFOID:0000000005148990

REMOVAL

WARNING:

Perform the work when the exhaust and cooling system have cooled sufficiently.
1. Remove the engine undercover (rear) using power tool (4WD models).
2. Remove front final drive assembly (4WD models). Refer to 

DLN-215, "Removal and Installation"

.

3. Remove the main muffler assembly and center exhaust tube. Refer to 

EX-6, "Removal and Installation"

.

4. Remove the front exhaust tubes. Refer to 

EX-6, "Removal and Installation"

.

5. Remove front tires. Refer to 

WT-49, "Rotation"

.

6. Remove fender protectors. Refer to 

EXT-23, "Removal and Installation"

.

7. Remove the LH and RH air fuel ratio A/F sensors. 

• Follow steps below to remove each air fuel ratio A/F sensor.

a. Remove the harness connector of each air fuel ratio A/F sensor, and harness from bracket and middle

clamp.

1. Air fuel ratio A/F sensor 1 (bank 2)

2. Exhaust manifold cover (bank 2)

3.

Exhaust manifold (bank 2)

4. Gaskets

5. Exhaust manifold (bank 1)

6.

Exhaust manifold cover (bank 1)

7. Air fuel ratio A/F sensor 1 (bank 1)

A. Up

B. Coated face

C. Manifold side

D. Up mark

Front

AWBIA0453GB

EXHAUST MANIFOLD AND THREE WAY CATALYST

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b. Remove the air fuel ratio A/F sensors from both LH and RH

exhaust manifolds using Tool.

CAUTION:

• Do not damage the air fuel ratio A/F sensors

• Discard any air fuel ratio A/F sensor which has been

dropped from a height of more than 0.5m (19.7 in) onto a

hard surface such as a concrete floor. Replace it with a

new one.

8. Support the engine using a suitable tool. 
9. Remove the exhaust manifold (LH) (A) following the steps

below.
•

: Front

• B: Exhaust manifold (RH)

a. Remove the engine mounting insulator. Refer to 

EM-78,

"Exploded View"

.

b. Remove the exhaust manifold cover.
c. Remove the engine mounting bracket. Refer to 

EM-78,

"Exploded View"

.

d. Loosen the nuts in reverse order as shown using power tool.
e. Remove the exhaust manifold (LH) (A).

10. Remove the exhaust manifold (RH) (B) following the steps

below.
•

: Front

• A: Exhaust manifold (LH)

a. Remove the engine mounting insulator. Refer to 

EM-78,

"Exploded View"

.

b. Remove the exhaust manifold cover.
c. Remove the engine mounting bracket. Refer to 

EM-78,

"Exploded View"

.

d. Remove the oil level gauge guide. Refer to 

EM-33, "Exploded

View"

.

e. Loosen the nuts in reverse order as shown using power tool.
f.

Remove the exhaust manifold (RH) (B).

INSPECTION AFTER REMOVAL

Surface Distortion

• Check the flatness of each exhaust manifold flange surface using

suitable tools.

• If measurement exceeds the limit, replace the exhaust manifold.

INSTALLATION

Installation is in the reverse order of removal.

Tool number

:  —  (J-44626)

WBIA0630E

AWBIA0814ZZ

AWBIA0814ZZ

Flatness limit

: 0.3 mm (0.012 in)

KBIA2504E

EM-32

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EXHAUST MANIFOLD AND THREE WAY CATALYST

• Install new exhaust manifold gasket with the top of the triangular

up mark on it facing up and its coated face (gray side) toward the

exhaust manifold side.

• Tighten the exhaust manifold nuts LH and RH in the numerical

order shown. Then recheck the torque of the nuts.

- A: Exhaust manifold (LH)

- B: Exhaust manifold (RH)
-

: Front

• Before installing new air fuel ration A/F sensors, clean the exhaust system threads using suitable tool and

apply anti-seize lubricant.

CAUTION:

• Do not over tighten the air fuel ratio A/F sensors. Doing so may cause damage to the sensor,

resulting in the MIL coming on.

KBIA2553E

AWBIA0814ZZ

Oxygen sensor thread cleaner

:  (J-43879-12)

Oxygen sensor thread cleaner

:  (J-43897-18)

OIL PAN AND OIL STRAINER

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OIL PAN AND OIL STRAINER

Exploded View

INFOID:0000000005148991

Removal and Installation

INFOID:0000000005148992

REMOVAL

WARNING:

To avoid the danger of being scalded, never drain the engine oil when the engine is hot.
1. Drain engine oil. Refer to 

LU-9, "Changing Engine Oil"

.

2. Remove the engine. Refer to 

EM-78, "Removal and Installation"

.

3. Remove the oil pan (lower) using the following steps.

1.

Oil pan (upper)

2.

O-ring

3.

O-ring

4.

O-ring

5.

O-ring (with collar)

6.

Oil level gauge guide

7.

Oil level gauge

8.

O-ring

9.

Connector bolt

10.

Oil filter

11. Oil cooler

12. Relief valve

13.

Oil pressure switch

14. Gasket

15. Drain plug

16.

Oil pan (lower)

17. Oil strainer

KBIA2465E