Nissan Pathfinder (2010 year). Instruction — part 378
EM-152
< ON-VEHICLE MAINTENANCE >
[VK56DE]
SPARK PLUG
SPARK PLUG
Exploded View
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Removal and Installation
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REMOVAL
1. Remove ignition coil. Refer to
EM-173, "Removal and Installation"
2. Remove spark plug using suitable tool.
CAUTION:
Do not drop or shock it.
INSPECTION AFTER REMOVAL
• Do not use a wire brush for cleaning.
• If the spark plug tip is covered with carbon, a spark plug cleaner
may be used.
1. Ignition coil
2. Spark plug
WBIA0796E
SEM294A
Cleaner air pressure : Less than 588 kPa (5.9 bar, 6 kg/
cm
2
, 85 psi)
Cleaning time
: Less than 20 seconds
SMA773C
2010 Pathfinder
SPARK PLUG
EM-153
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• Checking and adjusting spark plug gap is not required between
change intervals.
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
Do not drop or shock spark plug.
*: Always check with the Parts Department for the latest parts information
SMA806CA
Make
NGK
Standard type*
DILFR5A-11
Gap (Nominal)
1.1 mm (0.043 in)
2010 Pathfinder
EM-154
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[VK56DE]
CAMSHAFT VALVE CLEARANCE
CAMSHAFT VALVE CLEARANCE
Valve Clearance
INFOID:0000000005260503
INSPECTION
NOTE:
Perform the following inspection after removal, installation or replacement of camshaft or valve-related parts,
or if there are unusual engine conditions due to changes in valve clearance over time (starting, idling, and/or
noise).
1. Warm up the engine. Then stop the engine.
2. Remove the engine room cover. Refer to
EM-160, "Removal and Installation"
3. Remove the air cleaner and air duct assembly. Refer to
4. Remove the RH bank and LH bank rocker covers using power tool. Refer to
.
5. Turn the crankshaft pulley in the normal direction (clockwise
when viewed from engine front) to align TDC identification notch
(without paint mark) with timing indicator.
6. At this time, make sure both the intake and exhaust cam noses
of No. 1 cylinder (top front on LH bank) face outside.
• If they do not face outside, turn crankshaft pulley once more.
KBIA2476E
KBIA0400J
2010 Pathfinder
CAMSHAFT VALVE CLEARANCE
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7. Measure valve clearances at the locations marked “
×
” as shown
in the table below (locations indicated with black arrow).
•
: Engine front
•
(black): Measurable at No.1 cylinder compression top dead
center
•
(white): Measurable at No. 3 cylinder compression top
dead center
• A: RH
• B: LH
• C: Exhaust
• D: Intake
NOTE:
Firing order 1-8-7-3-6-5-4-2
• No. 1 cylinder compression TDC
• Measure valve clearance using suitable tool. Refer to
CAUTION:
If the inspection was carried out with a cold engine, make
sure the values with a fully warmed up engine are still
within specifications.
8. Turn the crankshaft pulley clockwise 270
°
from the position of No. 1 cylinder compression TDC to obtain
No. 3 cylinder compression TDC.
Measuring position (RH bank)
No. 2 cyl
(E)
No. 4 cyl
(F)
No. 6 cyl
(G)
No. 8 cyl
(H)
No. 1 cylinder at TDC
EXH
×
INT
×
×
Measuring position (LH bank)
No. 1 cyl
(J)
No. 3 cyl
(K)
No. 5 cyl
(L)
No. 7 cyl
(M)
No. 1 cylinder at TDC
INT
×
×
EXH
×
×
WBIA0713E
KBIA0185E
2010 Pathfinder
EM-156
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[VK56DE]
CAMSHAFT VALVE CLEARANCE
9. Measure valve clearances at the locations marked “
×
” as shown
in the table below (locations indicated with white arrow).
•
: Engine front
•
(black): Measurable at No.1 cylinder compression top dead
center
•
(white): Measurable at No. 3 cylinder compression top
dead center
• A: RH
• B: LH
• C: Exhaust
• D: Intake
NOTE:
Firing order 1-8-7-3-6-5-4-2
• No. 3 cylinder compression TDC
• Measure valve clearance using suitable tool. Refer to
CAUTION:
If the inspection was carried out with a cold engine, make
sure the values with a fully warmed up engine are still
within specifications.
Measuring position (RH bank)
No. 2 cyl
(E)
No. 4 cyl
(F)
No. 6 cyl
(G)
No. 8 cyl
(H)
No. 3 cylinder at TDC
EXH
×
INT
×
Measuring position (LH bank)
No. 1 cyl
(J)
No. 3 cyl
(K)
No. 5 cyl
(L)
No. 7 cyl
(M)
No. 3 cylinder at TDC
INT
×
×
EXH
×
×
WBIA0713E
KBIA0185E
2010 Pathfinder
CAMSHAFT VALVE CLEARANCE
EM-157
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10. Turn the crankshaft pulley clockwise 90
°
from the position of No.
3 cylinder compression TDC (clockwise by 360
°
from the posi-
tion of No. 1 cylinder compression TDC) to measure the intake
and exhaust valve clearances of No. 6 cylinder (G) and the
exhaust valve clearance of No. 2 cylinder (E).
•
: Front
• A: RH
• B: LH
• C: Exhaust
• D: Intake
• E: No. 2 cylinder
• F: No. 4 cylinder
• G: No. 6 cylinder
• H: No. 8 cylinder
• J: No. 1 cylinder
• K: No. 3 cylinder
• L: No. 5 cylinder
• M: No. 7 cylinder
11. If out of specifications, adjust as necessary.
ADJUSTMENT
NOTE:
• Perform adjustment depending on the selected head thickness of the valve lifter.
• The specified valve lifter thickness is the dimension at normal temperatures. Ignore dimensional differences
caused by temperature. Use the specifications for hot engine condition to adjust.
1. Remove the camshaft. Refer to
EM-189, "Removal and Installation"
2. Remove the valve lifters at the locations that are out of specification.
3. Measure the center thickness of the removed valve lifters using
suitable tool.
4. Use the equation below to calculate the valve lifter thickness for
replacement.
• Valve lifter thickness calculation:
Thickness of replacement valve lifter = t1+ (C1 - C2)
t1 = Thickness of removed valve lifter
C1 = Measured valve clearance
C2= Standard valve clearance:
• Thickness of a new valve lifter can be identified by stamp
marks on the reverse side (inside the cylinder).
Stamp mark N788 indicates 7.88 mm (0.3102 in) in thickness.
• 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
5. Install the selected valve lifter.
WBIA0713E
KBIA0057E
KBIA0119E
2010 Pathfinder
EM-158
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CAMSHAFT VALVE CLEARANCE
6. Install the camshaft.
7. Instructionly turn the crankshaft pulley a few turns.
8. Make sure the valve clearances for a cold engine are within specifications. Refer to
.
9. After completing the repair, check the valve clearances again with the specifications for a warmed engine.
Make sure the values are within specifications. Refer to
.
2010 Pathfinder
COMPRESSION PRESSURE
EM-159
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COMPRESSION PRESSURE
Compression Pressure
INFOID:0000000005260504
CHECKING COMPRESSION PRESSURE
1. Warm up the engine thoroughly. Then stop the engine.
2. Release the fuel pressure. Refer to
.
CAUTION:
If CONSULT-III is not used to release fuel pressure leave the fuel pump fuse disconnected until
step 7.
3. Remove the spark plug from each cylinder. Refer to
EM-152, "Removal and Installation"
.
4. Connect the engine tachometer (not required in use of CONSULT-III).
5. Install the compression tester with Tool into the spark plug hole.
6. With the accelerator pedal fully depressed, turn the ignition
switch to “START” for cranking. When the gauge pointer stabi-
lizes, read the compression pressure and engine rpm. Perform
these steps to check each cylinder.
Unit: kPa (kg/cm
2
, psi) /rpm
CAUTION:
Always use a fully charged battery to obtain specified engine speed.
• If the engine speed is out of the specified range, check the battery liquid for proper gravity. Check the
engine speed again with normal battery gravity.
• If the compression pressure is below the minimum value, check the valve clearances and parts associ-
ated with the combustion chamber (valve, valve seat, piston, piston ring, cylinder bore, cylinder head,
cylinder head gasket). After checking, measure the compression pressure again.
• If some cylinders have low compression pressure, pour a 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, the piston rings may be worn out or damaged. Check
the piston rings and replace if necessary.
- If the compression pressure remains at a low level despite the addition of engine oil, the valves may be
malfunctioning. Check the valves for damage. Replace the 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, the cylinder head gaskets may be leaking, or a valve in adja-
cent cylinders may be damaged. Inspect and repair as required.
7. Install the components in the reverse order of removal.
8. Start the engine and confirm that it runs smoothly.
9. Perform trouble diagnosis. If DTC appears, erase it. Refer to
Tool number
: EG15050500 (J-45402)
Standard
Minimum
Deference limit be-
tween cylinders
1,520 (15.5, 220) / 200
1,324 (13.5, 192) / 200
98 (1.0, 14) / 200
WBIA0605E
2010 Pathfinder
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