Infiniti QX56 (JA60). Manual - part 478

EM-66

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OIL SEAL

• Press-fit until the height of the front oil seal is level with the

mounting surface using suitable tool.

CAUTION:

• Do not damage front timing chain case and crankshaft.

• Press-fit straight and avoid causing burrs or tilting of the

oil seal.

3. Apply engine oil onto the threaded parts of the crankshaft pulley bolt and seating area.
4. Align the matchmark on the crankshaft pulley bolt flange and the

crankshaft pulley, install crankshaft pulley and tighten bolt to

specifications using Tool. 

5. Remove Tool (A).

6. Installation of the remaining components is in the reverse order of removal.

Removal and Installation of Rear Oil Seal

INFOID:0000000005149006

REMOVAL

1. Remove the transmission assembly. Refer to 

TM-186, "Removal and Installation (2WD)"

 or 

TM-188,

"Removal and Installation (4WD)"

.

2. Before removing the drive plate, put a match mark (A) on the

crankshaft and drive plate for alignment during installation

3. Remove the drive plate.

PBIC2931E

Crankshaft pulley bolt torque
Step 1

: 93.1 N·m (9.5 kg-m, 69 ft-lb)

Step 2

: additional 90

° (angle tightening)

Tool number

: KV10112100 (BT-8653-A)

KBIA2519E

Tool number

:  —  (J-47245) 

LBIA0455E

ALBIA0522ZZ

OIL SEAL

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• Holding the crankshaft pulley bolt, lock the crankshaft to

remove the drive plate bolts.

• Remove drive plate bolts diagonally.

CAUTION:

• Do not damage the drive plate. Especially, avoid deform-

ing and damaging the signal plate teeth (circumference

position).

• Keep magnetic materials away from signal plate.

• Place the drive plate with the signal plate surface facing

upward.

4. Remove the rear oil seal using suitable tool.

CAUTION:

Do not damage crankshaft or oil seal retainer surface.

INSTALLATION

1. Apply new engine oil to both the oil seal lip and dust seal lip of the new rear oil seal.
2. Install the rear oil seal.

• Install the rear oil seal so that each seal lip is oriented as

shown.

• Press-fit the rear oil seal using suitable tool.

CAUTION:

• Do not damage the crankshaft or cylinder block.

• Press-fit the oil seal straight to avoid causing burrs or

tilting.

• Do not touch grease applied onto the oil seal lip.

• Do not damage or scratch the outer circumference of

the rear oil seal.

• Tap until flattened with the front edge of the oil seal retainer. 

3. Installation of the remaining components is in the reverse order of removal. Refer to 

EM-83, "Disassembly

and Assembly"

, 

TM-186, "Removal and Installation (2WD)"

, 

TM-188, "Removal and Installation (4WD)"

.

CAUTION:

• When replacing an engine or transmission you must make sure the dowels are installed cor-

rectly during re-assembly.

• Improper alignment caused by missing dowels may cause vibration, oil leaks or breakage of

drivetrain components.

KBIA2491E

WBIA0437E

SEM715A

WBIA0438E

EM-68

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CYLINDER HEAD

CYLINDER HEAD

Exploded View

INFOID:0000000005149007

Removal and Installation

INFOID:0000000005149008

REMOVAL

1. Remove the engine assembly from the vehicle. Refer to 

EM-78, "Removal and Installation"

.

2. Remove the following components and related parts:

• Drive belt auto tensioner drive belts and idler pulley. Refer to 

EM-14, "Drive Belt Auto Tensioner and

Idler Pulley"

.

• Thermostat housing and hose. Refer to 

CO-22, "Removal and Installation"

.

• Oil pan and oil strainer. Refer to 

EM-33, "Removal and Installation"

. 

• Fuel tube and fuel injector assembly. Refer to 

EM-40, "Removal and Installation"

. 

• Intake manifold. Refer to 

EM-26, "Removal and Installation"

. 

• Rocker cover. Refer to 

EM-38, "Removal and Installation"

.

3. Remove the crankshaft pulley, front cover, oil pump, and timing chain. Refer to 

EM-45, "Removal and

Installation"

.

4. Remove the camshaft sprockets and camshafts. Refer to 

EM-53, "Removal and Installation"

.

5. Remove the cylinder head bolts in reverse of order shown.
6. Remove the cylinder heads.

INSPECTION AFTER REMOVAL

 Cylinder Head Bolts Diameter

1.

Harness bracket

2.

Engine coolant temperature sensor

3.

Washer

4.

Cylinder head gasket (LH)

5.

Cylinder head (RH)

6.

Cylinder head bolt

7.

Cylinder head gasket (RH)

8.

Cylinder head (LH)

KBIA2528E

PBIC0068E

CYLINDER HEAD

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• Cylinder head bolts are tightened by plastic zone tightening

method. Whenever the size difference between d1 and d2 exceeds

the limit, replace the bolt with a new one. 

• If reduction of diameter appears in a position other than d2, use it

as d2 point.

INSTALLATION

1. Install a new cylinder head gasket.
2. Install the cylinder head. Follow the steps below to tighten the

bolts in the numerical order shown.

CAUTION:

• If cylinder head bolts are re-used, check their diameters

before installation. Refer to "Cylinder Head Bolts Diame-

ter".

a. Apply engine oil to threads and seating surface of the bolts.

b. Measure the tightening angle using Tool.

CAUTION:

Measure the tightening angle using Tool. Do not measure

visually. 

3. Installation of the remaining components is in the reverse order of removal.

INSPECTION AFTER INSTALLATION

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

lower than required quantity, fill to the specified level. Refer to 

MA-13, "Fluids and Lubricants"

.

• Use procedure below to check for fuel leakage.

• Turn ignition switch ON (with engine stopped). With fuel pressure applied to the fuel piping, check for fuel

leakage at the 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 timing chain tensioner drops after removal and installation, slack in the guide

may generate a pounding noise during and just after engine start. However, this is normal. Noise will stop

after hydraulic pressure rises.

• Warm up engine thoroughly to make sure there is no leakage of fuel, exhaust gas, or any oils/fluids including

engine oil and engine coolant.

• Bleed air from passages in lines and hoses, such as in cooling system.

Limit (d1 - d2)

: 0.23 mm (0.0091 in)

KBIA0189E

PBIC0068E

Step a : 44.1 N·m (4.5 kg-m, 33 ft-lb) 
Step b : 70

° clockwise

Step c : Loosen in the reverse order of tightening.
Step d : 44.1 N·m (4.5 kg-m, 33 ft-lb)
Step e : 60

° clockwise

Step f

: 60

° clockwise

Tool number

: KV10112100 (BT-8653-A)

WBIA0603E