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Nissan Titan A60. Manual - part 459

CAMSHAFT VALVE CLEARANCE

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< PERIODIC MAINTENANCE >

9. 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).
•

: Engine 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

10. 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-58, "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-114, "Standard

and Limit"

5. Install the selected valve lifter.

WBIA0713E

KBIA0057E

KBIA0119E

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< PERIODIC MAINTENANCE >

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-114, "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-114, "Standard and Limit"

COMPRESSION PRESSURE

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< PERIODIC MAINTENANCE >

COMPRESSION PRESSURE

Checking Compression Pressure

INFOID:0000000006179387

1. Warm up the engine thoroughly. Then stop the engine.
2. Release the fuel pressure. Refer to

EC-473, "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-16, "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 gaskets may be leaking, or a valve in adjacent cylinders

may be damaged. Inspect and repair as required.

7. Installation of the components is 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-30, "System 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

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< REMOVAL AND INSTALLATION >

ENGINE ROOM COVER

REMOVAL AND INSTALLATION

ENGINE ROOM COVER

Removal and Installation

INFOID:0000000006179388

CAUTION:

Do not damage or scratch engine room cover when installing or removing.

REMOVAL

• Remove the engine room cover bolts and engine room cover.

INSTALLATION

Installation is in the reverse order of removal.

WBIA0795E

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