Nissan X-Trail 32. Manual - part 1065

STRUCTURE AND OPERATION

EM-157

< SYSTEM DESCRIPTION >

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OPERATION

VTC minimum phase (mechanical)

• The valve timing of the intake valve is set in the retarded angle.
• The valve timing of the exhaust valve is set in the advance angle.

VTC maxmum phase (mechanical)

• The valve timing of the intake valve is set in the advance angle.
• The valve timing of the exhaust valve is set in the retarded angle .

VTC intermediate lock phase [engine start (mechanical)]

• The valve timing of the intake valve is set in the intermediate lock

angle.

• The valve timing of the exhaust valve is set in the most advance

angle.

• Locking in the intermediate phase secures the cold startability and

reduces HC.

Intake and Exhaust System

INFOID:0000000010783763

STRUCTURE 

JSBIA3415GB

JSBIA3416GB

JSBIA3417GB

EM-158

< SYSTEM DESCRIPTION >

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STRUCTURE AND OPERATION

OPERATION

The intake valve timing control and exhaust valve timing control are controlled to the optimum combination by
the integrated engine control. For the integrated engine control, refer to 

EC-455, "ENGINE CONTROL SYS-

TEM : System Description"

.

Electric throttle control actuator

Gasket

Intake manifold

Gasket

Gasket

Exhaust manifold

Exhaust manifold cover (upper)

Exhaust manifold cover (lower)

Three way catalyst cover

JSBIA4478ZZ

JSBIA4463GB

CAMSHAFT VALVE CLEARANCE

EM-159

< BASIC INSPECTION >

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BASIC INSPECTION

CAMSHAFT VALVE CLEARANCE

Inspection and Adjustment

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INSPECTION

Perform inspection as follows after removal, installation or replacement of camshaft or valve-related parts, or if
there is unusual engine conditions regarding valve clearance. 
1.

Remove rocker cover. Refer to 

EM-189, "Exploded View"

.

2.

Measure the valve clearance with the following procedure:

a.

Set No. 1 cylinder at TDC of its compression stroke.
• Rotate crankshaft pulley 

 clockwise and align TDC mark (no

paint)  

 to timing indicator 

 on front cover.

• At the same time, check that both intake and exhaust cam

noses of No. 1 cylinder face outside as shown in the figure.

• If they do not face outside, rotate crankshaft pulley once more

(360 degrees) and align as shown in the figure.

b.

Use a feeler gauge, measure the clearance between valve lifter
and camshaft. 

: Paint marks

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Valve clearance

: Refer to 

EM-275, "Camshaft"

.

SEM139D

EM-160

< BASIC INSPECTION >

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CAMSHAFT VALVE CLEARANCE

• By referring to the figure, measure the valve clearances at

locations marked “

×

” as shown in the table below [locations

indicated with black arrow (

) in the figure] with a feeler

gauge.

c.

Rotate crankshaft pulley 

 one revolution (360 degrees) and

align TDC mark (no paint) 

 to timing indicator 

 on front cover. 

• By referring to the figure, measure the valve clearance at loca-

tions marked “

×

” as shown in the table below [locations indi-

cated with black arrow (

) in the figure] with a feeler gauge. 

3.

If out of standard, perform adjustment. Refer to "ADJUSTMENT".

ADJUSTMENT

• Perform adjustment depending on selected head thickness of valve lifter.

: No. 1 cylinder at compression TDC

: Intake side

: No. 1 cylinder

: No. 2 cylinder

: No. 3 cylinder

: No. 4 cylinder

: Exhaust side

: Engine front

JSBIA3309ZZ

Measuring position

No. 1 CYL.

No. 2 CYL.

No. 3 CYL.

No. 4 CYL.

No. 1 cylinder at compression TDC

INT

×

×

EXH

×

×

: Paint marks

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: No. 4 cylinder at compression TDC

: Intake side

: No. 1 cylinder

: No. 2 cylinder

: No. 3 cylinder

: No. 4 cylinder

: Exhaust side

: Engine front

JSBIA3310ZZ

Measuring position

No. 1 CYL.

No. 2 CYL.

No. 3 CYL.

No. 4 CYL.

No. 4 cylinder at compression TDC

INT

×

×

EXH

×

×