Nissan Pathfinder (2009 year). Manual - part 379

OIL SEAL

EM-89

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OIL SEAL

Removal and Installation of Valve Oil Seal

INFOID:0000000003939507

REMOVAL

1.

Turn crankshaft until the cylinder requiring new oil seals is at TDC. This will prevent valve from dropping
into cylinder.

2.

Remove camshaft relating to valve oil seal to be removed. Refer to 

EM-81, "Removal and Installation"

.

3.

Remove valve lifters. Refer to 

EM-81, "Removal and Installation"

.

4.

Remove valve collet, valve spring retainer and valve spring
using Tool.

CAUTION:

When working, take care not to damage valve lifter holes.

• Compress valve spring using Tool attachment, adapter.

Remove valve collet with magnet hand.

5.

Remove valve oil seal using Tool.

INSTALLATION

1.

Apply new engine oil to new valve oil seal joint surface and seal lip.

2.

Press in valve oil seal to specified height "H" using Tool.

NOTE:
Dimension "H": height measured before valve spring seat instal-
lation.

3.

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

Removal and Installation of Front Oil Seal

INFOID:0000000003939508

REMOVAL

1.

Remove engine undercover using power tools.

2.

Remove drive belts. Refer to 

EM-13, "Removal and Installation"

.

3.

Remove engine cooling fan assembly. Refer to 

CO-19, "Removal and Installation (Crankshaft driven

type)"

.

4.

Remove crankshaft pulley. Refer to 

EM-61, "Removal and Installation"

.

Tool numbers

: KV10116200 (J-26336-B)

: KV10115900 (J-26336-20)

: KV10109220 (

—

)

WBIA0578E

Tool number

: KV10107902 (J-38959)

WBIA0489E

Tool number

: 

—

(J-39386)

Intake and exhaust

: 14.3 - 14.9 mm (0.563 - 0.587 in)

WBIA0490E

2009 Pathfinder

EM-90

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OIL SEAL

5.

Remove front oil seal using suitable tool.

CAUTION:

Be careful not to damage front timing chain case and crank-
shaft.

INSTALLATION

1.

Apply new engine oil to both oil seal lip and dust seal lip of new front oil seal.

2.

Install front oil seal.
• Install front oil seal so that each seal lip is oriented as shown.

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

ing surface using suitable tool.

- Suitable drift: outer diameter 60 mm (2.36 in), inner diameter

50 mm (1.97 in).

CAUTION:

• Be careful not to damage front timing chain case and

crankshaft.

• Press-fit straight and avoid causing burrs or tilting oil

seal.

3.

Installation is in the reverse order of removal after this step.

Removal and Installation of Rear Oil Seal

INFOID:0000000003939509

REMOVAL

1.

Remove transmission assembly. Refer to 

TM-214, "2WD : Removal and Installation"

 (2WD models), 

TM-

218, "4WD : Removal and Installation"

 (4WD models).

2.

Remove driveplate. Refer to 

EM-107, "Exploded View"

.

3.

Remove rear oil seal with a suitable tool.

CAUTION:

Be careful not to damage crankshaft and cylinder block.

PBIC2931E

SEM715A

PBIC2931E

PBIC2932E

2009 Pathfinder

OIL SEAL

EM-91

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INSTALLATION

1.

Apply new engine oil to new rear oil seal joint surface and seal lip.

2.

Install rear oil seal so that each seal lip is oriented as shown.

• Install new rear oil seal using Tool.

CAUTION:

• Be careful not to damage crankshaft and cylinder block.
• Press-fit oil seal straight to avoid causing burrs or tilt-

ing.

• Do not touch grease applied onto oil seal lip.

• Press in rear oil seal to the position as shown.

3.

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

CAUTION:

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

rectly during reassembly.

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

drivetrain components.

SEM715A

Tool number

: KV991J0120 (J-47128)

LBIA0454E

SBIA0281E

2009 Pathfinder

EM-92

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CYLINDER HEAD

CYLINDER HEAD

Exploded View

INFOID:0000000003939510

Removal and Installation

INFOID:0000000003939511

REMOVAL

1.

Remove camshaft. Refer to 

EM-81, "Removal and Installation"

.

2.

Remove intake manifold. Refer to 

EM-29, "Removal and Installation"

.

3.

Remove exhaust manifold. Refer to 

EM-31, "Removal and Installation"

.

4.

Remove water inlet and thermostat assembly. Refer to 

CO-27, "Removal and Installation"

.

5.

Remove water outlet, water pipe and heater pipe. Refer to 

CO-29, "Removal and Installation"

.

1.

Rubber plug

2.

Cylinder head (left bank)

3.

Cylinder head bolt

4.

Cylinder head (right bank)

5.

Harness bracket

6.

Cylinder head gasket (right bank)

7.

Cylinder head gasket (left bank)

PBIC2934E

2009 Pathfinder

CYLINDER HEAD

EM-93

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6.

Remove cylinder head bolts in reverse order as shown using
suitable tool and power tool to remove cylinder heads (right and
left banks).

7.

Remove cylinder head gaskets.

INSPECTION AFTER REMOVAL

Cylinder Head Bolts Outer Diameter

• 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 outer diameter appears in a position other than “d2”,

use it as “d2” point.

Cylinder Head Distortion

NOTE:
When performing this inspection, cylinder block distortion should be also checked. Refer to 

EM-118, "Inspec-

tion After Disassembly"

.

1.

Using suitable tool, wipe off oil, scale, gasket, sealant and carbon deposits from surface of cylinder head.

CAUTION:

Do not allow gasket fragments to enter engine oil or engine coolant passages.

2.

At each of several locations on bottom surface of cylinder head,
measure the distortion in six directions.

• If it exceeds the limit, replace cylinder head.

INSTALLATION

PBIC2057E

Limit (“d1” – “d2”)

: 0.11 mm (0.0043 in)

PBIC2480E

Limit

: 0.1 mm (0.004 in)

SEM861E

2009 Pathfinder

EM-94

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CYLINDER HEAD

1.

Install new cylinder head gasket.

2.

Turn crankshaft until No. 1 piston is set at TDC.
• Crankshaft key should line up with the right bank cylinder cen-

ter line as shown.

3.

Install cylinder head follow the steps below to tighten cylinder
head bolts in numerical order as shown.

CAUTION:

If cylinder head bolts re-used, check their outer diameters
before installation. Refer to 

EM-92, "Removal and Installa-

tion"

 (Cylinder Head Bolts Outer Diameter).

Measure the tightening angle using Tool.

SEM532G

Step a

: 98 N·m (10 kg-m, 72 ft-lb) 

Step b

: Loosen to 0 N·m in the reverse order of tight-
ening.

Step c

: 39.2 N·m (4.0 kg-m, 29 ft-lb)

PBIC2057E

Tool number

: KV10112100 (BT-8653-A)

Step d

: 90

°

 clockwise

Step e

: 90

°

 clockwise

WBIA0581E

2009 Pathfinder

CYLINDER HEAD

EM-95

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4.

After installing cylinder head, measure distance between front
end faces of cylinder block and cylinder head (left and right
banks).

• If the measured value is out of the standard, re-install cylinder

head.

5.

Installation of the remaining parts 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-12, "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 oil/fluids including

engine oil and engine coolant.

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

specified level if necessary.

• Summary of the inspection items:

* Transmission/transaxle/CVT fluid, power steering fluid, brake fluid, etc.

Standard

: 14.1 - 14.9 mm (0.555 - 0.587 in) 

EMQ0662D

Item

Before starting engine

Engine running

After engine stopped

Engine coolant

Level

Leakage

Level

Engine oil

Level

Leakage

Level

Other oils and fluids*

Level

Leakage

Level

Fuel

Leakage

Leakage

Leakage

Exhaust gas

—

Leakage

—

2009 Pathfinder

EM-96

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CYLINDER HEAD

Exploded View

INFOID:0000000003939512

Disassembly and Assembly

INFOID:0000000003939513

DISASSEMBLY

1.

Remove spark plug.

2.

Remove valve lifter.
• Identify installation positions, and store them without mixing them up.

3.

Remove valve collet.
• Compress valve spring and remove valve collet with magnet

hand using Tool.

CAUTION:

When working, take care not to damage valve lifter holes.

4.

Remove valve spring retainer, valve spring and valve spring seat.

5.

Push valve stem to combustion chamber side, and remove valve.
• Identify installation positions, and store them without mixing them up.

1.

Valve lifter

2.

Valve collet

3.

Valve spring retainer

4.

Valve spring

5.

Valve oil seal

6.

Valve spring seat

7.

Valve guide

8.

Spark plug

9.

Spark plug tube

10. Cylinder head (right bank)

11.

Valve seat

12. Valve (EXH)

13.  Valve (INT)

14. Cylinder head (left bank)

PBIC2637E

Tool numbers

: KV10109220 (

—

)

: KV10116200 (J-26336-B)

: KV10115900 (J-26336-20)

WBIA0578E

2009 Pathfinder