Nissan Pathfinder (2006 year). Manual — part 242
CAMSHAFT
EM-83
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2006 Pathfinder
INSPECTION AFTER INSTALLATION
Inspection of Camshaft Sprocket (INT) Oil Groove
CAUTION:
●
Perform this inspection only when DTC P0011 or P0021 are detected in self-diagnostic results of
CONSULT-II and it is directed according to inspection procedure of EC section. Refer to
●
Check when engine is cold so as to prevent burns from any splashing engine oil.
1.
Check the engine oil level. Refer to
.
2.
Perform the following procedure so as to prevent the engine from being unintentionally started while
checking.
a.
Release fuel pressure. Refer to
EC-79, "FUEL PRESSURE RELEASE"
.
b.
Disconnect ignition coil and injector harness connectors.
3.
Remove intake valve timing control solenoid valve. Refer to
4.
Crank the engine, and then make sure that engine oil comes out
from camshaft bracket (No. 1) oil hole. End crank after checking.
WARNING:
Be careful not to touch rotating parts (drive belts, idler pul-
ley, and crankshaft pulley, etc.).
CAUTION:
Engine oil may squirt from intake valve timing control sole-
noid valve installation hole during cranking. Use a shop
cloth to prevent the engine components and the vehicle. Do
not allow engine oil to get on rubber components such as
drive belt or engine mount insulators. Immediately wipe off
any splashed engine oil.
●
Clean oil groove between oil strainer and intake valve timing control solenoid valve if engine oil does not
come out from camshaft bracket (No. 1) oil hole. Refer to
5.
Remove components between intake valve timing control solenoid valve and camshaft sprocket (INT),
and then check each oil groove for clogging.
●
Clean oil groove if necessary. Refer to
6.
After inspection, install removed parts.
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.
NOTE:
If hydraulic pressure inside timing chain tensioner drops after removal/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 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.
PBIC2869E
EM-84
CAMSHAFT
2006 Pathfinder
Summary of the inspection items:
* Transmission/transaxle/CVT fluid, power steering fluid, brake fluid, etc.
Valve Clearance
EBS00QC1
INSPECTION
In cases of removing/installing or replacing camshaft and valve-
related parts, or of unusual engine conditions due to changes in
valve clearance (found malfunctions during stating, idling or causing
noise), perform inspection as follows:
1.
Remove rocker covers (right and left banks). Refer to
EM-41, "Removal and Installation"
2.
Measure the valve clearance as follows:
a.
Set No. 1 cylinder at TDC of its compression stroke.
●
Rotate crankshaft pulley clockwise to align timing mark
(grooved line without color) with timing indicator.
●
Make sure that intake and exhaust cam noses on No. 1 cylin-
der (engine front side of right bank) are located as shown.
●
If not, rotate crankshaft one revolution (360
°
) and align as
shown.
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
SEM713A
KBIA1717J
SEM418G
CAMSHAFT
EM-85
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2006 Pathfinder
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
2006 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
2006 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
2006 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
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