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Nissan Pathfinder (2010 year). Manual - part 378

EM-152

< ON-VEHICLE MAINTENANCE >

[VK56DE]

SPARK PLUG

SPARK PLUG

Exploded View

INFOID:0000000005260501

Removal and Installation

INFOID:0000000005260502

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/

, 85 psi)

Cleaning time

: Less than 20 seconds

SMA773C

2010 Pathfinder

SPARK PLUG

EM-153

< ON-VEHICLE MAINTENANCE >

[VK56DE]

• 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

< ON-VEHICLE MAINTENANCE >

[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

EM-161, "Exploded View"

4. Remove the RH bank and LH bank rocker covers using power tool. Refer to

EM-174, "Removal and

Installation"

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

EM-155

< ON-VEHICLE MAINTENANCE >

[VK56DE]

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

EM-244,

"Standard and Limit"

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

< ON-VEHICLE MAINTENANCE >

[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

EM-244,

"Standard and Limit"

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

< ON-VEHICLE MAINTENANCE >

[VK56DE]

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

EM-244, "Standard

and Limit"

5. Install the selected valve lifter.

WBIA0713E

KBIA0057E

KBIA0119E

2010 Pathfinder

EM-158

< ON-VEHICLE MAINTENANCE >

[VK56DE]

CAMSHAFT VALVE CLEARANCE

6. Install the camshaft.
7. Manually turn the crankshaft pulley a few turns.
8. Make sure the valve clearances for a cold engine are within specifications. Refer to

EM-244, "Standard

and Limit"

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

EM-244, "Standard and Limit"

2010 Pathfinder

COMPRESSION PRESSURE

EM-159

< ON-VEHICLE MAINTENANCE >

[VK56DE]

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

EC-958, "Fuel Pressure Check"

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

, 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

EC-566, "Description"

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

Content .. 376 377 378 379 ..