Nissan Xterra. Manual - part 353

EM-40

< REMOVAL AND INSTALLATION >

[VQ40DE]

IGNITION COIL

IGNITION COIL

Exploded View

INFOID:0000000009484461

Removal and Installation

INFOID:0000000009484462

REMOVAL (LH)

1. Move aside harness, harness bracket, and hoses located above ignition coil.
2. Disconnect harness connector from ignition coil.
3. Remove ignition coil.

CAUTION:

Do not shock ignition coil.

INSTALLATION (LH)

Installation is in the reverse order of removal.

REMOVAL (RH)

1. Remove intake manifold collector. Refer to 

EM-25, "Removal and Installation"

.

2. Move aside harness, harness bracket, and hoses located above ignition coil.
3. Disconnect harness connector from ignition coil.
4. Remove ignition coil.

CAUTION:

Do not shock ignition coil.

INSTALLATION (RH)

Installation is in the reverse order of removal.

1.

Ignition coil

2.

Spark plug

PBIC2901E

ROCKER COVER

EM-41

< REMOVAL AND INSTALLATION >

[VQ40DE]

C

D

E

F

G

H

I

J

K

L

M

A

EM

N

P

O

ROCKER COVER

Exploded View

INFOID:0000000009484463

Removal and Installation

INFOID:0000000009484464

REMOVAL (LH)

1. Remove ignition coils. Refer to 

EM-40, "Removal and Installation"

.

2. Separate engine harness removing their brackets from rocker covers.
3. Remove harness bracket from cylinder head, if necessary. 
4. Disconnect the intake valve timing control solenoid valve (LH bank). Refer to 

EM-51, "Exploded View"

.

5. Remove PCV hoses from rocker covers.
6. Remove oil filler cap from rocker cover (LH), if necessary.
7. Remove the rocker cover bolts using power tool in reverse order

as shown.
•

: Front

1.

Oil filler cap

2.

PCV hose

3.

PCV valve

4.

O-ring

5.

Rocker cover (RH)

6.

PCV hose

7.

Rocker cover gasket (RH)

8.

Rocker cover gasket (LH)

9.

Rocker cover (LH)

10. PCV hose

PBIC2905E

AWBIA0729ZZ

EM-42

< REMOVAL AND INSTALLATION >

[VQ40DE]

ROCKER COVER

8. Remove rocker cover.
9. Remove rocker cover gaskets from rocker covers.
10. Use scraper to remove all traces of liquid gasket from cylinder head and camshaft bracket (No. 1).

CAUTION:

Do not scratch or damage the mating surface when cleaning off old liquid gasket.

INSTALLATION (LH)

1. Apply liquid gasket using Tool to joint of rocker cover, cylinder

head and camshaft bracket (No. 1) as follows:

Use Genuine RTV Silicone Sealant or equivalent. Refer to

GI-21, "Recommended Chemical Products and Sealants"

.

NOTE:

The figure shows an example of LH side [zoomed in shows

camshaft bracket (No. 1)].

a. Apply liquid gasket to joint part of camshaft bracket (a) (No. 1)

and cylinder head.

b. Apply liquid gasket (b) 90

° to figure (a).

2. Install new rocker cover gasket to rocker cover.
3. Install rocker cover.

• Check to be sure rocker cover gasket is not dropped from installation groove of rocker cover.

4. Tighten the rocker cover bolts in two steps in numerical order as

shown.
•

: Front

5. Install oil filer cap to rocker cover (LH), if removed.
6. Install PCV hose.

• Insert PCV hose by 25 to 30 mm (0.98 to 1.18 in) from connector end.

• When installing, be careful not to twist or come in contact with other parts.

7. Installation of the remaining components is in the reverse order of removal.

• Check engine oil level and adjust as necessary. Refer to 

LU-7, "Inspection"

.

REMOVAL (RH)

1. Remove intake manifold collector. Refer to 

EM-25, "Removal and Installation"

.

CAUTION:

Perform this step when engine is cold.

2. Separate engine harness removing their brackets from rocker covers.

Tool number

: WS39930000 (

—

)

PBIC2474E

1st step

: 1.96 N·m (0.20 kg-m, 17 in-lb)

2nd step

: 8.33 N·m (0.85 kg-m, 74 in-lb)

AWBIA0729ZZ

ROCKER COVER

EM-43

< REMOVAL AND INSTALLATION >

[VQ40DE]

C

D

E

F

G

H

I

J

K

L

M

A

EM

N

P

O

3. Remove harness bracket from cylinder head (RH). Refer to 

EM-88, "Removal and Installation"

.

4. Disconnect the intake valve timing control solenoid valve (RH bank). Refer to 

EM-51, "Exploded View"

.

5. Remove ignition coils. Refer to 

EM-40, "Removal and Installation"

.

6. Remove PCV hoses from rocker cover.
7. Remove PCV valve and O-ring from rocker cover (RH), if necessary.

CAUTION:

Do not reuse O-ring.

8. Remove the rocker cover bolts using power tool in reverse order

as shown.
•

: Front

9. Remove rocker cover.
10. Remove rocker cover gaskets from rocker covers.
11. Use scraper to remove all traces of liquid gasket from cylinder head and camshaft bracket (No. 1).

CAUTION:

Do not scratch or damage the mating surface when cleaning off old liquid gasket.

INSTALLATION (RH)

1. Apply liquid gasket using Tool to joint part among rocker cover,

cylinder head and camshaft bracket (No. 1) as follows:

Use Genuine RTV Silicone Sealant or equivalent. Refer to

GI-21, "Recommended Chemical Products and Sealants"

.

NOTE:

The figure shows an example of LH side [zoomed in shows

camshaft bracket (No. 1)].

a. Apply liquid gasket to joint part of camshaft bracket (a) (No. 1)

and cylinder head.

b. Apply liquid gasket (b) 90

° to figure (a).

2. Install new rocker cover gasket to rocker cover.
3. Install rocker cover.

• Check to be sure rocker cover gasket is not dropped from installation groove of rocker cover.

AWBIA0730ZZ

Tool number

: WS39930000 (

—

)

PBIC2474E