Nissan Pathfinder (2007 year). Manual — part 241
CAMSHAFT
EM-85
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b.
Use feeler gauge, measure the clearance between valve lifter
and camshaft.
Valve clearance:
Unit: mm (in)
*: Approximately 80
°
C (176
°
F)
●
By referring to the figure, measure the valve clearances at
locations marked “
×
” as shown (locations indicated in the fig-
ure) with feeler gauge.
●
No. 1 cylinder at compression TDC
c.
Rotate crankshaft by 240
°
clockwise (when viewed from engine
front) to align No. 3 cylinder at TDC of its compression stroke.
NOTE:
Crankshaft pulley bolt flange has a stamped line every 60
°
. They
can be used as a guide to rotation angle.
SEM139D
Cold
Hot * (reference data)
Intake
0.26 - 0.34 (0.010 - 0.013)
0.304 - 0.416 (0.012 - 0.016)
Exhaust
0.29 - 0.37 (0.011 - 0.015)
0.308 - 0.432 (0.012 - 0.017)
Measuring position (right bank)
No. 1 CYL.
No. 3 CYL.
No. 5 CYL.
No. 1 cylinder at
compression TDC
EXH
×
INT
×
Measuring position (left bank)
No. 2 CYL.
No. 4 CYL.
No. 6 CYL.
No. 1 cylinder at
compression TDC
INT
×
EXH
×
PBIC2054E
PBIC2916E
EM-86
CAMSHAFT
2007 Pathfinder
●
By referring to the figure, measure the valve clearances at
locations marked “
×
” as shown in the table below (locations
indicated in the figure) with feeler gauge.
●
No. 3 cylinder at compression TDC
d.
Rotate crankshaft by 240
°
clockwise (when viewed from engine
front) to align No. 5 cylinder at TDC of compression stroke.
●
By referring to the figure, measure the valve clearances at
locations marked “
×
” as shown in the table below (locations
indicated in the figure) with feeler gauge.
●
No. 5 cylinder at compression TDC
Measuring position (right bank)
No. 1 CYL.
No. 3 CYL.
No. 5 CYL.
No. 3 cylinder at
compression TDC
EXH
×
INT
×
Measuring position (left bank)
No. 2 CYL.
No. 4 CYL.
No. 6 CYL.
No. 3 cylinder at
compression TDC
INT
×
EXH
×
PBIC2055E
PBIC2916E
Measuring position (right bank)
No. 1 CYL.
No. 3 CYL.
No. 5 CYL.
No. 5 cylinder at
compression TDC
EXH
×
INT
×
Measuring position (left bank)
No. 2 CYL.
No. 4 CYL.
No. 6 CYL.
No. 5 cylinder at
compression TDC
INT
×
EXH
×
PBIC2056E
CAMSHAFT
EM-87
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3.
For the measured value out of the standard, perform adjustment. Refer to
.
ADJUSTMENT
●
Perform adjustment depending on selected head thickness of valve lifter.
1.
Measure the valve clearance. Refer to
2.
Remove camshaft. Refer to
.
3.
Remove valve lifters at the locations that are out of the standard.
4.
Measure the center thickness of removed valve lifters with
micrometer.
5.
Use the equation below to calculate valve lifter thickness for replacement.
●
Thickness of new valve lifter can be identified by stamp marks
on the reverse side (inside the cylinder).
Intake
Available thickness of valve lifter: 27 sizes with range 7.88 to 8.40 mm (0.3102 to 0.3307 in) in steps of
0.02 mm (0.0008 in) (when manufactured at factory). Refer to
EM-136, "Available Valve Lifter"
KBIA0057E
Valve lifter thickness calculation:
t = t
1
+ (C
1
– C
2
)
t
= Valve lifter thickness to be replaced
t
1
= Removed valve lifter thickness
C
1
= Measured valve clearance
C
2
= Standard valve clearance:
Intake
: 0.30 mm (0.012 in)*
Exhaust
: 0.33 mm (0.013 in)*
*: Approximately 20
°
C (68
°
F)
KBIA0119E
Stamp mark
Thickness
788U
7.88 mm (0.3102 in)
790U
7.90 mm (0.3110 in)
·
·
·
·
840U
8.40 mm (0.3307 in)
EM-88
CAMSHAFT
2007 Pathfinder
Exhaust
Available thickness of valve lifter: 25 sizes with range 7.88 to 8.36 mm (0.3102 to 0.3291 in) in steps of
0.02 mm (0.0008 in) (when manufactured at factory). Refer to
EM-136, "Available Valve Lifter"
.
CAUTION:
Install identification letter at the end and top, “U” and “N”, at each of proper positions. (Be care-
ful of mis-installation between intake and exhaust.)
6.
Install selected valve lifter.
7.
Install camshaft. Refer to
.
8.
Manually turn crankshaft pulley a few turns.
9.
Make sure that the valve clearances for cold engine are within the specifications by referring to the speci-
fied values.
10. Installation of the remaining components is in the reverse order of removal.
11. Start the engine, and check for unusual noise and vibration.
Stamp mark
Thickness
N788
7.88 mm (0.3102 in)
N790
7.90 mm (0.3110 in)
·
·
·
·
N836
8.36 mm (0.3291 in)
OIL SEAL
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OIL SEAL
PFP:00100
Removal and Installation of Valve Oil Seal
EBS00QC2
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
3.
Remove valve lifters. Refer to
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 height "H" using Tool to specified
height.
NOTE:
Dimension "H": height measured before valve spring seat instal-
lation.
3.
Installation of the remaining components is in the reverse order
of removal.
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
EM-90
OIL SEAL
2007 Pathfinder
Removal and Installation of Front Oil Seal
EBS00QC3
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.
PBIC2931E
SEM715A
PBIC2931E
OIL SEAL
EM-91
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Removal and Installation of Rear Oil Seal
EBS00QC4
REMOVAL
1.
Remove transmission assembly. Refer to
AT-240, "TRANSMISSION ASSEMBLY"
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.
●
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.
3.
Installation of the remaining components is in the reverse order of removal.
PBIC2932E
SEM715A
SBIA0281E
Tool number
: KV991J0120 (J-47128)
LBIA0454E
EM-92
CYLINDER HEAD
2007 Pathfinder
CYLINDER HEAD
PFP:11041
On-Vehicle Service
EBS00QC5
CHECKING COMPRESSION PRESSURE
1.
Warm up engine thoroughly. Then, stop it.
2.
Release fuel pressure. Refer to
EC-79, "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
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