Nissan Pathfinder (2005 year). Instruction — part 248
OIL SEAL
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2005 Pathfinder
Removal and Installation of Front Oil Seal
EBS00NK1
REMOVAL
1.
Remove engine undercover using power tools.
2.
Remove drive belts. Refer to
.
3.
Remove engine cooling fan assembly. Refer to
.
4.
Remove crankshaft pulley. Refer to
.
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
mounting 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
EBS00NK2
REMOVAL
1.
Remove transmission assembly. Refer to
AT-245, "TRANSMISSION ASSEMBLY"
.
PBIC2931E
SEM715A
PBIC2931E
EM-90
OIL SEAL
2005 Pathfinder
2.
Remove rear oil seal with a suitable tool.
CAUTION:
Be careful not to damage crankshaft and cylinder block.
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.
●
Press in rear oil seal to the position as shown.
●
Press-fit rear oil seal using a suitable drift [outside diameter
104 mm (4.09 in), inside diameter 88 mm (3.46 in)].
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.
3.
Installation of the remaining components is in the reverse order of removal.
PBIC2932E
SEM715A
SBIA0281E
PBIC2933E
CYLINDER HEAD
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2005 Pathfinder
CYLINDER HEAD
PFP:11041
On-Vehicle Service
EBS00NK3
CHECKING COMPRESSION PRESSURE
1.
Warm up engine thoroughly. Then, stop it.
2.
Release fuel pressure. Refer to
EC-91, "FUEL PRESSURE RELEASE"
.
3.
Disconnect fuel pump fuse to avoid fuel injection during mea-
surement.
4.
Remove intake manifold collector. Refer to
.
5.
Remove spark plug from each cylinder. Refer to
.
6.
Connect engine tachometer (not required in use of CONSULT-ll).
7.
Install compression tester with adapter onto spark plug hole.
●
Use compression gauge whose picking up end inserted to
spark plug hole is smaller than 20 mm (0.79 in) in diameter.
Otherwise, it may be caught by cylinder head during removal.
8.
Turn ignition switch to “START” for cranking. When the gauge pointer stabilizes, read the compression
pressure and engine rpm. Perform these steps to check each cylinder.
Compression pressure:
Unit: kPa (kg/cm
2
, psi) /rpm
CAUTION:
Always use a fully changed battery to obtain specified engine speed.
●
If the engine speed is out of specified range, check battery liquid for proper gravity. Check engine
speed again with normal battery gravity.
BBIA0534E
PBIC0900E
SBIA0533E
Standard
Minimum
Differential limit between cylinders
1,275 (13.0, 185) / 300
981 (10.0, 142) / 300
98 (1.0, 14) / 300
EM-92
CYLINDER HEAD
2005 Pathfinder
●
If compression pressure is below minimum value, check valve clearances and parts associated with
combustion chamber (valve, valve seat, piston, piston ring, cylinder bore, cylinder head, cylinder head
gasket). After the checking, measure compression pressure again.
●
If some cylinders have low compression pressure, pour small amount of engine oil into the spark plug
hole of the cylinder to re-check it for compression.
●
If the added engine oil improves the compression, piston rings may be worn out or damaged. Check the
piston rings and replace if necessary.
●
If the compression pressure remains at low level despite the addition of engine oil, valves may be mal-
functioning. Check valves for damage. Replace valve or valve seat accordingly.
●
If two adjacent cylinders have respectively low compression pressure and their compression remains
low even after the addition of engine oil, cylinder head gaskets are leaking. In such a case, replace cyl-
inder head gaskets.
9.
After inspection is completed, install removed parts.
10. Start engine, and make sure that engine runs smoothly.
11. Perform trouble diagnosis. If DTC appears, erase it. Refer to
.
Removal and Installation
EBS00NK4
REMOVAL
1.
Remove camshaft. Refer to
.
2.
Remove intake manifold. Refer to
.
3.
Remove exhaust manifold. Refer to
EM-21, "Removal and Installation"
.
4.
Remove water inlet and thermostat assembly. Refer to
.
5.
Remove water outlet, water pipe and heater pipe. Refer to
.
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
CYLINDER HEAD
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6.
Remove cylinder head bolts in reverse order as shown using
commercial service 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 them with 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.
Tool number
: (J-24239-01)
PBIC2057E
Limit (“d1” – “d2”)
: 0.11 mm (0.0043 in)
PBIC2480E
Limit
: 0.1 mm (0.004 in)
SEM861E
EM-94
CYLINDER HEAD
2005 Pathfinder
INSTALLATION
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
.
SEM532G
Step a
: 98 N·m (10 kg-m, 72 ft-lb)
Step b
: Loosen to 0 N·m in the reverse order of
tightening.
Step c
: 39.2 N·m (4.0 kg-m, 29 ft-lb)
Step d
: 90
°
clockwise
Step e
: 90
°
clockwise
PBIC2057E
WBIA0581E
CYLINDER HEAD
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2005 Pathfinder
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
Inspection for Leaks
The following are procedures for checking fluid leaks, lubricant leaks and exhaust gases leaks.
●
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-11, "RECOMMENDED 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
leakage 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.
●
Warm up engine thoroughly to make sure there is no leakage of fuel, exhaust gases, or any oil/fluids
including engine oil and engine coolant.
●
Bleed air from lines and hoses of applicable lines, such as in cooling system.
●
After cooling down engine, again check oil/fluid levels including engine oil and engine coolant. Refill to the
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 fluid*
Level
Leakage
Level
Fuel
Leakage
Leakage
Leakage
Exhaust gases
—
Leakage
—
EM-96
CYLINDER HEAD
2005 Pathfinder
Disassembly and Assembly
EBS00NK5
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-A)
: KV10115900 (J-26336-20)
WBIA0578E
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