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Nissan Frontier. Manual - part 754

CYLINDER HEAD

EM-205

< REMOVAL AND INSTALLATION >

[VQ40DE]

CYLINDER HEAD

Exploded View

INFOID:0000000009478141

Removal and Installation

INFOID:0000000009478142

REMOVAL

NOTE:

When removing components such as hoses, tubes/lines, etc., cap or plug openings to prevent fluid from spill-

ing.
1. Remove camshaft. Refer to

EM-193, "Removal and Installation"

2. Remove intake manifold. Refer to

EM-145, "Removal and Installation"

3. Remove exhaust manifold. Refer to

EM-148, "Removal and Installation (Exhaust Manifold)"

4. Remove front final drive assembly (4WD models). Refer to

DLN-191, "Removal and Installation"

5. Remove water inlet and thermostat assembly (left bank). Refer to

CO-55, "Removal and Installation"

6. Remove water outlet, water pipe and heater pipe. Refer to

CO-57, "Removal and Installation"

Rubber plug

Cylinder head (left bank)

Cylinder head bolt

Cylinder head (right bank)

Harness bracket

Cylinder head gasket (right bank)

Cylinder head gasket (left bank)

PBIC2934E

EM-206

< REMOVAL AND INSTALLATION >

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CYLINDER HEAD

7. Remove cylinder head bolts in reverse order as shown using

suitable tool and power tool to remove cylinder heads (right and

left banks).

8. Remove cylinder head gaskets.

INSPECTION AFTER REMOVAL

Cylinder Head Bolts Outer Diameter

• Cylinder head bolts are tightened by plastic zone tightening

method. Whenever the size difference between (d1) and (d2)

exceeds the limit, replace the bolt with a new one.

• If reduction of outer diameter appears in a position other than (d2),

use it as (d2) point.

Cylinder Head Distortion

NOTE:

When performing this inspection, cylinder block distortion should be also checked. Refer to

EM-230, "Inspec-

tion After Disassembly"

1. Using suitable tool, wipe off oil, scale, gasket, sealant and carbon deposits from surface of cylinder head.

CAUTION:

Do not allow gasket fragments to enter engine oil or engine coolant passages.

2. At each of several locations on bottom surface of cylinder head,

measure the distortion in six directions.

• If measured distortion exceeds the limit, replace cylinder head.

INSTALLATION

PBIC2057E

Limit [(d1) - (d2)]

: 0.11 mm (0.0043 in)

PBIC2480E

Limit

: 0.1 mm (0.004 in)

SEM861E

CYLINDER HEAD

EM-207

< REMOVAL AND INSTALLATION >

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1. Install new cylinder head gasket.
2. Turn crankshaft until No. 1 piston is set at TDC.

• Crankshaft key should line up with the right bank cylinder cen-

ter line as shown.

3. Install cylinder head follow the steps below to tighten cylinder

head bolts in numerical order as shown.

CAUTION:

If cylinder head bolts are re-used, check their outer diame-

ters before installation. Refer to

EM-205, "Removal and

Installation"

(Cylinder Head Bolts Outer Diameter).

Measure the tightening angle using Tool.

SEM532G

Step a

: 98.1 N·m (10 kg-m, 72 ft-lb)

Step b

: Loosen to 0 N·m in the reverse order of tight-
ening.

Step c

: 39.2 N·m (4.0 kg-m, 29 ft-lb)

PBIC2057E

Tool number

: KV10112100 (BT-8653-A)

Step d

: 90

° clockwise

Step e

: 90

° clockwise

WBIA0581E

EM-208

< REMOVAL AND INSTALLATION >

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CYLINDER HEAD

4. After installing cylinder head, measure distance between front

end faces of cylinder block and cylinder head (left and right

banks).

• If the measured value is out of the standard, re-install cylinder

head.

5. Installation of the remaining parts is in the reverse order of removal.

INSPECTION AFTER INSTALLATION

• 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-16, "FOR USA AND CANADA : Fluids and Lubricants"

(United

States and Canada). Refer to

MA-18, "FOR MEXICO : Fluids and Lubricants"

(Mexico).

• 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 leak-

age 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 and 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 gas, or any oils/fluids including

engine oil and engine coolant.

• Bleed air from passages in lines and hoses, such as in cooling system.

• After cooling down engine, again check oil/fluid levels including engine oil and engine coolant. Refill to spec-

ified level, if necessary.

• Summary of the inspection items:

*Power steering fluid, brake fluid, etc.

Standard

: 14.1 - 14.9 mm (0.555 - 0.587 in)

EMQ0662D

Item

Before starting engine

Engine running

After engine stopped

Engine coolant

Level

Leakage

Level

Engine oil

Level

Leakage

Level

Transmission/
transaxle fluid

A/T and CVT Models

Leakage

Level/Leakage

Leakage

M/T Models

Level/Leakage

Leakage

Level/Leakage

Other oils and fluids*

Level

Leakage

Level

Fuel

Leakage

Exhaust gas

—

Leakage

—

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