Nissan Frontier. Manual - part 736

SPARK PLUG

EM-133

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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 the spark plug.

*: Always check with the Parts Department for the latest parts information.

Cleaner air pressure

: Less than 588 kPa (6 kg/cm

2

, 85 psi)

Cleaning time

: Less than 20 seconds

SMA806CA

Make

NGK

Standard type*

DILFR5A-11

Gap (nominal)

1.1 mm (0.043 in)

EM-134

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CAMSHAFT VALVE CLEARANCE

CAMSHAFT VALVE CLEARANCE

Valve Clearance

INFOID:0000000009478104

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. Remove the engine room cover using power tool. Refer to 

EM-140, "Removal and Installation"

.

2. Remove the air cleaner and air duct assembly. Refer to 

EM-141, "Removal and Installation"

.

3. Remove rocker covers (RH and LH banks). Refer to 

EM-158, "Removal and Installation"

.

4. 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 (A)

(grooved line without color) with timing indicator (B).

• Make sure that intake and exhaust cam noses on No. 1 cylin-

der (engine front side of RH bank) are located as shown.

• If not, rotate crankshaft one revolution (360

°) and align as

shown.

b. Use feeler gauge, measure the clearance between valve lifter

and camshaft.

Valve Clearance

Unit: mm (in)

1

: Approximately 20

°C (68°F)

AWBIA0719ZZ

SEM418G

SEM139D

Cold 

1

 (reference data)

Hot 

2

 (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)

CAMSHAFT VALVE CLEARANCE

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2

: Approximately 80

°C (176°F)

• Measure the valve clearances at locations marked “

×” as

shown in the table below (locations indicated in the illustration)

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.

• Measure the valve clearances at locations marked “

×” as

shown in the table below (locations indicated in the illustration)

with feeler gauge.

• No. 3 cylinder at compression TDC

Measuring position (RH bank)

No. 1 CYL.

No. 3 CYL.

No. 5 CYL.

No. 1 cylinder at 

compression TDC

EXH

×

INT

×

Measuring position (LH bank)

No. 2 CYL.

No. 4 CYL.

No. 6 CYL.

No. 1 cylinder at 

compression TDC

INT

×

EXH

×

PBIC2054E

PBIC2916E

Measuring position (RH bank)

No. 1 CYL.

No. 3 CYL.

No. 5 CYL.

No. 3 cylinder at 

compression TDC

EXH

×

INT

×

Measuring position (LH bank)

No. 2 CYL.

No. 4 CYL.

No. 6 CYL.

No. 3 cylinder at 

compression TDC

INT

×

EXH

×

PBIC2055E

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CAMSHAFT VALVE CLEARANCE

d. Rotate crankshaft by 240

° clockwise (when viewed from engine

front) to align No. 5 cylinder at TDC of compression stroke. 

• Measure the valve clearances at locations marked “

×” as

shown in the table below (locations indicated in the illustration)

with feeler gauge.

• No. 5 cylinder at compression TDC

5. For the measured value out of the standard, perform adjustment. 

ADJUSTMENT

• Perform adjustment depending on selected head thickness of valve lifter.
1. Measure the valve clearance. 
2. Remove camshaft. Refer to 

EM-193, "Removal and Installation"

.

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.

PBIC2916E

Measuring position (RH bank)

No. 1 CYL.

No. 3 CYL.

No. 5 CYL.

No. 5 cylinder at 

compression TDC

EXH

×

INT

×

Measuring position (LH bank)

No. 2 CYL.

No. 4 CYL.

No. 6 CYL.

No. 5 cylinder at 

compression TDC

INT

×

EXH

×

PBIC2056E

KBIA0057E