Nissan Pathfinder (2010 year). Manual — part 371

EM-96

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[VQ40DE]

CYLINDER HEAD

• Check valve spring pressure at the specified spring height.

• If the installation load or load with valve open is out of the standard, replace valve spring.

Standard:

Intake and exhaust

Free height

: 47.07 mm (1.8531 in)

Installation height

: 37.00 mm (1.4567 in)

Installation load

: 166 - 188 N (16.9 - 19.2 kg, 37 - 42 lb)

Height during valve open

: 27.20 mm (1.0709 in)

Load with valve open

: 373 - 421 N (38.0 - 42.9 kg, 84 - 95 lb)

SEM113

2010 Pathfinder

ENGINE ASSEMBLY

EM-97

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REMOVAL AND INSTALLATION

ENGINE ASSEMBLY

Exploded View

INFOID:0000000005260473

Removal and Installation

INFOID:0000000005260474

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.

1.

Rear engine mounting insulator 4WD 2. Rear engine mounting insulator 2WD 3. LH engine mounting bracket (upper)

4.

LH heat shield plate

5. LH engine mounting insulator

6. LH engine mounting bracket (lower)

7.

RH engine mounting bracket (lower)

8. RH engine mounting insulator

9. RH heat shield plate

10. RH engine mounting bracket (upper)

AWBIA0721GB

2010 Pathfinder

EM-98

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ENGINE ASSEMBLY

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 procedures in the applica-

ble sections.

• 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-29, "Garage Jack and

Safety Stand"

.

REMOVAL

Preparation

1. Remove front and rear engine under covers, if equipped. Refer to

EXT-14, "Removal and Installation"

.

2. Drain engine oil. Refer to

LU-9, "Changing Engine Oil"

.

3. Remove engine oil filter.
4. Drain engine coolant. Refer to

CO-12, "Changing Engine Coolant"

.

5. Partially drain A/T fluid. Refer to

TM-157, "Changing the A/T Fluid (ATF)"

.

6. Remove the front wheels and tires. Refer to

WT-49, "Rotation"

.

7. Remove the front fender protectors. Refer to

EXT-23, "Removal and Installation of Front Fender Protec-

tor"

.

8. Release fuel pressure. Refer to

EC-495, "Fuel Pressure Check"

.

9. Remove the engine hood. Refer to

DLK-191, "Removal and Installation of Hood Assembly"

.

10. Disconnect the battery negative terminal. Refer to

PG-78, "Removal and Installation"

.

11. Remove engine room cover. Refer to

EM-25, "Removal and Installation"

.

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

EM-26, "Removal

and Installation"

.

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

CO-16, "Removal and Installation"

.

15. Remove the drive belts. Refer to

EM-14, "Removal and Installation"

.

16. Remove the engine cooling fan. Refer to

CO-19, "Removal and Installation (Crankshaft driven type)"

.

17. Disconnect the engine room harness from the engine side and set it aside.
18. Disconnect the engine harness grounds.
19. Disconnect the reservoir tank for power steering from engine and move it aside.
20. Disconnect power steering oil pump from engine. Move it from its location and secure with a rope. Refer to

ST-24, "Removal and Installation"

.

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

HA-39, "Removal and Installation for Compres-

sor"

.

22. Disconnect brake booster vacuum line.
23. Disconnect EVAP line.
24. Disconnect the fuel hose at the engine side connection. Refer to

EM-46, "Removal and Installation"

.

25. Disconnect the heater hoses at cowl, and install plugs to avoid leakage of engine coolant.
26. Remove the A/T oil level indicator and indicator tube.
27. Remove front final drive assembly (4WD models). Refer to

DLN-353, "Removal and Installation"

.

28. Remove three way catalyst. Refer to

EM-32, "Removal and Installation (Three Way Catalyst)"

.

2010 Pathfinder

ENGINE ASSEMBLY

EM-99

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29. Install engine slingers into left bank and right bank.

30. Remove front frame crossmember.
31. Remove transmission. Refer to

TM-191, "2WD : Removal and

Installation"

(2WD models) or

TM-195, "4WD : Removal and

Installation"

(4WD models).

32. Lift with hoist and secure the engine in position.
33. Remove engine assembly from vehicle, avoiding interference

with vehicle body.

CAUTION:

• Before and during this lifting, always check if any harnesses are left connected.

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

NOTE:

The procedure is described assuming that you use a engine holding the surface, to which transmission is

installed.

• Remove drive plate. Refer to

EM-121, "Dowel Pin Alignment"

.

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 fuel tube and fuel injector assembly. Refer to

EM-46, "Removal and Installation"

.

- Remove intake manifold. Refer to

EM-30, "Removal and Installation"

.

- Remove rocker cover. Refer to

EM-42, "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.

35. Remove generator. Refer to

CHG-21, "Removal and Installation"

.

36. Remove engine mounting insulator bracket (upper) with 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 reassembly.

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

etrain components.

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-16, "For North America"

.

• 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:

Engine slinger torque:

28.0 N·m (2.9 kg-m, 21 ft-lb)

WBIA0624E

2010 Pathfinder

EM-100

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ENGINE ASSEMBLY

* 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

Leakage

Leakage

Exhaust gas

—

Leakage

—

2010 Pathfinder

ENGINE UNIT

EM-101

< DISASSEMBLY AND ASSEMBLY >

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DISASSEMBLY AND ASSEMBLY

ENGINE UNIT

Exploded View

INFOID:0000000005260475

1.

Reinforcement plate

2.

Drive plate

3.

Rear oil seal

4.

Sub harness

5.

Knock sensor

6.

Water connector

7.

Cylinder block

8.

Oil jet

9.

Thrust bearing

10. Pilot converter

11. Main bearing

12. Crankshaft

13. Crankshaft key

14. Lower cylinder block

15. Lower cylinder block bolt

16. Connecting rod bolt

17. Connecting rod bearing cap

18. Connecting rod bearing

19. Connecting rod

20. Snap ring

21. Piston pin

22. Piston

23. Oil ring

24. Second ring

25. Top ring

WBIA0582E

2010 Pathfinder

EM-102

< DISASSEMBLY AND ASSEMBLY >

[VQ40DE]

ENGINE UNIT

Disassembly and Assembly

INFOID:0000000005260476

DISASSEMBLY

NOTE:

Explained here is how to disassemble with engine stand supporting transmission surface. When using differ-

ent type of engine stand, some steps may be different.
1. Remove engine assembly from vehicle. Refer to

EM-97, "Removal and Installation"

.

2. Remove both exhaust manifolds. Refer to

EM-33, "Removal and Installation (Exhaust Manifold)"

.

1.

Cylinder block

2.

Gasket

3.

Cylinder block heater

4.

Connector protector cap

PBIC2936E

2010 Pathfinder

ENGINE UNIT

EM-103

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3. Lift engine, and mount to engine stand.

CAUTION:

Before removing the hanging chains, make sure engine

stand is stable and there is no risk of overturning.

• A widely use engine stand can be used.

CAUTION:

Use engine stand that has a load capacity [approximately

220 kg (441 lb) or more] large enough for supporting the

engine weight.

4. Drain engine coolant by removing the cylinder block drain plugs

(A), (B), (C) and (D) from cylinder block as shown.

NOTE:

For Canada, (D) is not plug but block heater.

PBIC0805E

PBIC0085E

WLIA0020E

2010 Pathfinder