Nissan Pathfinder (2011 year). Instruction — part 372
OIL SEAL
EM-87
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OIL SEAL
Removal and Installation of Valve Oil Seal
INFOID:0000000006708848
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-78, "Removal and Installation"
.
3. Remove valve lifters. Refer to
EM-78, "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:0000000006708849
REMOVAL
1. Remove engine under cover. Refer to
EXT-15, "Removal and Installation"
.
2. Remove drive belt. Refer to
EM-14, "Removal and Installation"
.
3. Remove engine cooling fan assembly. Refer to
CO-21, "Removal and Installation (Crankshaft driven
.
4. Remove crankshaft pulley. Refer to
EM-53, "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
2011 Pathfinder
EM-88
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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:0000000006708850
REMOVAL
1. Remove transmission assembly. Refer to
TM-193, "2WD : Removal and Installation"
(2WD models),
197, "4WD : Removal and Installation"
(4WD models).
2. Remove driveplate. Refer to
.
3. Remove rear oil seal with a suitable tool.
CAUTION:
Be careful not to damage crankshaft and cylinder block.
PBIC2931E
SEM715A
PBIC2931E
PBIC2932E
2011 Pathfinder
OIL SEAL
EM-89
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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
: — (J-49815)
: — (J-8092)
PBIC2933E
SBIA0281E
2011 Pathfinder
EM-90
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CYLINDER HEAD
CYLINDER HEAD
Exploded View
INFOID:0000000006247033
Removal and Installation
INFOID:0000000006247034
REMOVAL
1. Remove camshaft. Refer to
EM-78, "Removal and Installation"
.
2. Remove intake manifold. Refer to
EM-30, "Removal and Installation"
3. Remove exhaust manifold. Refer to
EM-33, "Removal and Installation (Exhaust Manifold)"
4. Remove front final drive assembly (4WD only). Refer to
DLN-390, "Removal and Installation"
5. Remove water inlet and thermostat assembly (left bank). Refer to
CO-29, "Removal and Installation"
6. Remove water outlet, water pipe and heater pipe (left bank). Refer to
CO-31, "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
2011 Pathfinder
CYLINDER HEAD
EM-91
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7. Remove cylinder head bolts in reverse order as shown using
suitable tool and power tool to remove cylinder heads (right and
left banks).
8. 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
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
2011 Pathfinder
EM-92
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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 are re-used, check their outer diame-
ters before installation. Refer to
(Cylinder Head Bolts Outer Diameter).
Measure the tightening angle using Tool.
SEM532G
Step a
: 98.1 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
2011 Pathfinder
CYLINDER HEAD
EM-93
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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 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) or
MA-20, "FOR MEXICO : Fluids and Lubricants"
• 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:
*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
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
EM-94
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CYLINDER HEAD
Exploded View
INFOID:0000000006247035
Disassembly and Assembly
INFOID:0000000006247036
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
2011 Pathfinder
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