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Nissan Pathfinder (2009 year). Manual - part 395

CYLINDER HEAD

EM-217

< ON-VEHICLE REPAIR >

[VK56DE]

Press the valve guide from the camshaft side to the dimensions
as shown.

WARNING:

Cylinder head contains heat. When working, wear protec-
tive equipment to avoid getting burned.

Ream the cylinder head valve guide using suitable tool.

VALVE SEAT CONTACT

• After confirming that the dimensions of the valve guides and valves

are within specifications, perform this procedure.

• Apply prussian blue (or white lead) onto the contacting surface of

the valve seat to check the condition of the valve contact on the
surface.

• Check if the contact area band is continuous all around the circum-

ference.

• If not, grind to adjust the valve fit and check again. If the contacting

surface still has NG conditions even after the re-check, replace the
valve seat.

VALVE SEAT REPLACEMENT

When the valve seat is removed, replace it with oversized (0.5 mm, 0.020 in) valve seat.

Bore out the old seat until it collapses. Boring should not continue beyond the bottom face of the seat
recess in the cylinder head. Set the machine depth stop to ensure this.

Ream the cylinder head recess diameter for service valve seat.

• Be sure to ream in circles concentric to the valve guide center.
• This will enable valve seat to fit correctly.

KBIA2530E

Valve guide hole diameter:

Intake and exhaust

: 6.000 - 6.018 mm (0.2362
- 0.2369 in)

SEM932C

SBIA0322E

Oversize [0.5 mm (0.020 in)] (Service):

Intake

: 38.500 - 38.516 mm (1.5157 - 1.5164 in)

Exhaust

: 32.700 - 32.716 mm (1.2874 - 1.2880 in)

SEM795A

2009 Pathfinder

EM-218

< ON-VEHICLE REPAIR >

[VK56DE]

CYLINDER HEAD

Heat the cylinder head to 110

to 130

C (230

to 266

F) by

soaking it in heated oil.

Cool the valve seats well with dry ice. Force fit the valve seat into the cylinder head.

WARNING:

• Cylinder head contains heat. When working, wear protective equipment to avoid getting burned.

CAUTION:

• Avoid directly touching cold valve seats.

Finish the seat to the specified dimensions using suitable tool.
Refer to

EM-250, "Standard and Limit"

CAUTION:

When using valve seat cutter, firmly grip the cutter handle
with both hands. Then, press on the contacting surface all
around the circumference to cut in a single drive. Improper
pressure on the cutter or cutting many different times may
result in stage valve seat.

Grind to obtain the dimensions indicated as shown.
• Using compound, grind to adjust valve fitting.

Check again for normal contact.

VALVE SPRING SQUARENESS

SEM008A

SEM934C

KBIA2531E

KBIA2544E

2009 Pathfinder

CYLINDER HEAD

EM-219

< ON-VEHICLE REPAIR >

[VK56DE]

• Set try square along the side of valve spring and rotate the spring.

Measure the maximum clearance between the top face of spring
and try square.

• If measurement is not within specifications, replace the valve

spring.

VALVE SPRING DIMENSIONS AND VALVE SPRING PRESSURE LOAD

• Check the valve spring pressure at the specified spring height.

• If measurement is not within specifications, replace the valve spring.

Limit

: Less than 2.2 mm (0.087 in)

PBIC0080E

Standard:

Intake and exhaust

Free height:

50.58 mm (1.9913 in)

Installation height:

37.0 mm (1.457 in)

Installation pressure:

165.8 - 187.0 N (16.9 -
19.1 kg, 37- 42 lb)

Height during valve open:

28.2 mm (1.110 in)

Load with valve open:

314.8 - 355.0 N (32.1 -
36.2 kg, 71 - 80 lb)

SEM113

2009 Pathfinder

EM-220

< REMOVAL AND INSTALLATION >

[VK56DE]

ENGINE ASSEMBLY

REMOVAL AND INSTALLATION

ENGINE ASSEMBLY

Exploded View

INFOID:0000000003939573

Removal and Installation

INFOID:0000000003939574

WARNING:

• Situate vehicle on a flat and solid surface.
• Place chocks at front and back of rear wheels.
• For engines not equipped with engine slingers, attach proper slingers and bolts described in PARTS

CATALOG.

CAUTION:

• Always be careful to work safely, avoid forceful or uninstructed operations.
• Do not start working until exhaust system and engine coolant are cooled sufficiently.
• If items or work required are not covered by the engine section, follow the applicable procedures.
• Always use the support point specified for lifting.
• Use either 2-point lift type or separate type lift. If board-on type is used for unavoidable reasons,

support at the rear axle jacking point with transmission jack or similar tool before starting work, in
preparation for the backward shift of center of gravity.

• For supporting points for lifting and jacking point at rear axle, refer to

GI-41, "Garage Jack and

Safety Stand"

REMOVAL

Preparation

Remove air dam using power tool.

Rear engine mounting insulator

RH heat shield plate

RH engine mounting insulator

RH engine mounting bracket

LH engine mounting insulator

LH engine mounting bracket

LH heat shield plate

Front

AWBIA0454GB

2009 Pathfinder

ENGINE ASSEMBLY

EM-221

< REMOVAL AND INSTALLATION >

[VK56DE]

Remove engine undercover using power tool.

Drain the engine coolant. Refer to

CO-41, "Changing Engine Coolant"

Partially drain the A/T fluid. Refer to

TM-182, "Changing the A/T Fluid (ATF)"

Drain the transfer fluid. Refer to

DLN-133, "Replacement"

Remove the engine hood. Refer to

DLK-192, "Removal and Installation of Hood Assembly"

Release the fuel pressure. Refer to

EC-951, "Fuel Pressure Check"

Remove the engine room cover using power tool. Refer to

EM-166, "Removal and Installation"

Remove the air duct and air cleaner case assembly. Refer to

EM-167, "Removal and Installation"

10. Disconnect the vacuum hose between the vehicle and engine and set it aside.
11. Remove the radiator assembly and hoses. Refer to

CO-45, "Removal and Installation"

12. Remove the drive belts. Refer to

EM-155, "Removal and Installation"

13. Remove the fan blade. Refer to

CO-49, "Removal and Installation (Crankshaft Driven Type)"

14. Disconnect the engine room harness from the fuse box and set it aside.

15. Disconnect the ECM.

16. Disconnect the engine room harness from the engine side and set it aside.
17. Disconnect the engine harness grounds.

18. Disconnect the power steering reservoir tank from the engine and move it aside.

19. Disconnect the power steering oil pump from the engine. Move it aside and secure it using suitable wire or

rope. Refer to

ST-21, "Removal and Installation"

20. Remove the A/C compressor bolts and set the compressor aside. Refer to

HA-40, "Removal and Installa-

tion for Compressor"

21. Disconnect the brake booster vacuum line.

22. Disconnect the EVAP line.

23. Disconnect the fuel hose at the engine side connection. Refer to

EM-182, "Removal and Installation"

24. Disconnect the heater hoses at the cowl, and install plugs to avoid leakage of engine coolant.

25. Remove the A/T oil level indicator and indicator tube upper bolts.

26. Remove the front final drive assembly. Refer to

DLN-376, "Removal and Installation"

27. Remove the exhaust manifolds. Refer to

EM-172, "Removal and Installation"

28. Remove the A/T. Refer to

TM-218, "4WD : Removal and Installation"

29. Install the engine slingers into the left bank cylinder head (A)

and right bank cylinder head (B).

30. Lift using a hoist and secure the engine in position.

31. Remove engine mounting insulator bolts.
32. Remove the engine assembly from the vehicle, avoid interfer-

ence with the vehicle body.

CAUTION:

• Before and during lifting, always check if any harnesses

are left connected.

33. Remove the parts that may restrict installation of the engine to the engine stand.

NOTE:
This procedure is described assuming that you use an engine stand mounting to the surface to which the
transmission mounts.

Engine slinger torque:

45.0 N·m (4.6 kg-m, 33 ft-lb)

AWBIA0088ZZ

2009 Pathfinder

EM-222

< REMOVAL AND INSTALLATION >

[VK56DE]

ENGINE ASSEMBLY

Before removing the drive plate, put a match mark (A) on the
crankshaft and drive plate for alignment during installation.

Lock the drive plate using Tool (A).

CAUTION:

• Do not damage the ring gear teeth or the signal plate teeth

behind the ring gear when setting Tool.

• Keep magnetic materials away from signal plate.
NOTE:
Remove the bolts diagonally.

Remove the drive plate.

CAUTION:

• Never place drive plate with signal plate facing down.
• When handling the signal plate, take care not to damage

or scratch it.

• Handle the signal plate in a manner that prevents it from

becoming magnetized.

CAUTION:

Use an engine stand that has a load capacity [approximately 240kg (529 lb) or more] large enough
for supporting the engine weight.
• If the load capacity of the stand is not adequate, remove the following parts beforehand to

reduce the potential risk of overturning the stand.

- Remove the fuel tube and fuel injector assembly. Refer to

EM-182, "Removal and Installation"

- Remove the intake manifold. Refer to

EM-168, "Removal and Installation"

- Remove the ignition coil. Refer to

EM-179, "Removal and Installation"

- Remove the rocker cover. Refer to

EM-180, "Removal and Installation"

- Other removable brackets.

CAUTION:

Before removing the hanging chains, make sure the engine stand is stable and there is no risk of
overturning.

34. Remove the generator. Refer to

CHG-20, "Removal and Installation"

35. Remove the engine mounting insulator and bracket using power tool.

INSTALLATION

Installation is in the reverse order of removal.

CAUTION:

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

during re-assembly.

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

etrain components.

ALBIA0522ZZ

Tool number

: — (J-47245)

LBIA0455E

PBIC2938E

2009 Pathfinder

ENGINE ASSEMBLY

EM-223

< REMOVAL AND INSTALLATION >

[VK56DE]

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.

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

Exhaust gas

—

Leakage

—

2009 Pathfinder

EM-224

< DISASSEMBLY AND ASSEMBLY >

[VK56DE]

ENGINE UNIT

DISASSEMBLY AND ASSEMBLY

ENGINE UNIT

Exploded View

INFOID:0000000003939575

Knock sensor sub-harness

Knock sensor

Cylinder block

Main bearing upper

Top ring

Second ring

Oil ring

Crankshaft key

Piston

10.

Connecting rod

11.

Snap ring

12.

Piston pin

13.

Connecting rod bearing

14.

Connecting rod bearing cap

15.

Main bearing cap

WBIA0471E

2009 Pathfinder

Content .. 393 394 395 396 ..