Nissan Pathfinder (2011 year). Manual — part 374
ENGINE ASSEMBLY
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26. Install engine slingers into left bank and right bank.
27. Remove front frame crossmember.
28. Remove transmission. Refer to
(2WD models) or
(4WD models).
29. Remove engine mounting insulator bracket (upper) with power
tool.
30. Lift with hoist and secure the engine in position.
31. Remove engine mount bracket bolts.
32. Remove engine assembly from vehicle, avoiding interference with vehicle body.
CAUTION:
• Before and during this lifting, always check if any harnesses are left connected.
33. 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
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-47, "Removal and Installation"
- Remove intake manifold. Refer to
EM-30, "Removal and Installation"
- Remove rocker cover. Refer to
EM-43, "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.
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 engine, check oil/fluid levels including engine coolant and engine oil. If less than required
quantity, fill to the specified level. Refer to
MA-18, "FOR USA AND CANADA : Fluids and Lubricants"
(United
States and Canada) and (Mexico).
• Use procedure below to check for fuel leakage.
• Turn ignition switch ON (with engine stopped). With fuel pressure applied to fuel piping, check for fuel leak-
age at 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.
• After cooling down engine, again check oil/fluid levels including engine oil and engine coolant. Refill to spec-
ified level, if necessary.
• Summary of the inspection items:
Engine slinger torque:
28.0 N·m (2.9 kg-m, 21 ft-lb)
WBIA0624E
2011 Pathfinder
EM-104
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ENGINE ASSEMBLY
*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
Transmission/
transaxle fluid
A/T and CVT Models
Leakage
Level/Leakage
Leakage
M/T Models
Level/Leakage
Leakage
Level/Leakage
Other oils and fluids*
Level
Leakage
Level
Fuel
Leakage
Leakage
Leakage
Exhaust gas
—
Leakage
—
2011 Pathfinder
ENGINE UNIT
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UNIT DISASSEMBLY AND ASSEMBLY
ENGINE UNIT
Exploded View
INFOID:0000000006247040
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
2011 Pathfinder
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Disassembly and Assembly
INFOID:0000000006247041
DISASSEMBLY
NOTE:
The following procedures explain how to disassemble the engine with the engine stand fastened to the bell
housing. Some steps may be different if using a different type of engine stand.
1. Remove engine assembly from vehicle. Refer to
EM-101, "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
2011 Pathfinder
ENGINE UNIT
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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.
• Any widely used commercially available engine stand can be
used.
CAUTION:
Use an engine stand that has a load capacity large
enough for supporting the engine weight [approximately
220 kg (441 lb) or more].
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
2011 Pathfinder
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ENGINE UNIT
5. Remove cylinder head. Refer to
EM-90, "Removal and Installation"
6. Remove sub harness, and remove knock sensors.
CAUTION:
Handle sensor carefully; do not shock or drop.
7. Remove pilot converter using Tool as necessary.
8. Remove piston and connecting rod assembly as follows:
• Before removing piston and connecting rod assembly, check the connecting rod side clearance. Refer to
EM-116, "Inspection After Disassembly"
CAUTION:
Be careful not to drop connecting rod bearing or scratch the surface.
9. Position crankshaft pin corresponding to connecting rod to be removed onto the bottom dead center.
10. Remove connecting rod bearing cap.
11. Push piston and connecting rod assembly out of the cylinder
head side using suitable tool.
CAUTION:
Be careful not to damage the cylinder wall or crankshaft pin
resulting from an interference of the connecting rod big
end.
12. Remove connecting rod bearings from connecting rod and connecting rod bearing cap.
CAUTION:
Identify installation position, and store them without mixing them up.
13. Remove piston rings from piston.
• Before removing piston rings, check the piston ring side clearance. Refer to
.
• Remove piston rings using piston ring expander or suitable
tool.
CAUTION:
• When removing piston rings, be careful not to damage
piston.
• Be careful not to damage piston rings by expanding them
excessively.
14. Remove piston from connecting rod as follows:
Tool number
: ST16610001 (J-23907)
WBIA0583E
PBIC2940E
PBIC0087E
2011 Pathfinder
ENGINE UNIT
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a. Remove snap ring using snap ring pliers.
b. Heat piston to 60
°
to 70
°
C (140
°
to 158
°
F) with industrial use
drier or equivalent.
c. Push out piston pin with drift which has an outer diameter of
approximately 20 mm (0.79 in).
15. Remove lower cylinder block bolts.
• Before loosening lower cylinder block bolts, measure the crankshaft end play. Refer to
.
• Loosen lower cylinder block bolts in reverse order as shown in
several different steps.
NOTE:
Use TORX socket (size E14) for bolts No. 1 to 16 (M10 bolt).
16. Remove lower cylinder block.
• Cut liquid gasket for removal. Refer to
EM-6, "Precaution for Liquid Gasket"
.
CAUTION:
Be careful not to damage the mounting surfaces.
17. Remove crankshaft.
18. Pull rear oil seal out from rear end of crankshaft.
PBIC1638E
PBIC1639E
PBIC0262E
PBIC2941E
Tool number
: KV10111100 (J-37228)
2011 Pathfinder
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ENGINE UNIT
NOTE:
When replacing rear oil seal without removing lower cylinder block, use a suitable tool to pull the rear oil
seal installed between crankshaft and cylinder block out.
CAUTION:
Be careful not to damage crankshaft or cylinder block.
19. Remove main bearings and thrust bearings from cylinder block and lower cylinder block.
CAUTION:
• Do not drop main bearing, or scratch the surface.
• Identify installation positions, and store them without mixing them up.
20. Remove oil jet.
ASSEMBLY
1. Fully air-blow engine coolant and engine oil passages in cylinder block, cylinder bore and crankcase to
remove any foreign material.
WARNING:
Use goggles to protect your eyes.
2. Install each plug to cylinder block as shown.
• Apply sealant to the thread of water drain plugs (A) and (B).
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-14, "Recommended Chemical Products and Sealants"
.
• Apply sealant to the thread of plug (C).
Use Genuine High Strength Thread Locking Sealant or
• Apply sealant to the threads of plug (D).
Use Anaerobic Liquid Gasket or equivalent. Refer to
14, "Recommended Chemical Products and Sealants"
.
NOTE:
For Canada, (D) is not plug but block heater. Refer to
• Replace washers with new washers.
• Tighten each plug as specified below.
Block Plug and Block Heater Installation
3. Install oil jet.
WLIA0020E
Part
Washer
Tightening Torque
A
No
19.6 N·m (2.0 kg-m, 14 ft-lb)
B
Reuse
No
9.8 N·m (1.0 kg-m, 87 in-lb)
New
6.0 N·m (0.61 kg-m, 53 in-lb)
C
Yes
116 N·m (11.8 kg-m, 85 ft-lb)
D
Plug
Yes
62 N·m (6.3 kg-m, 46 ft-lb)
Block heater
73.5 N·m (7.5 kg-m, 54 ft-lb)
2011 Pathfinder
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