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
.
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
INFOID:0000000010783764
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
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
JSBIA3308ZZ
ALBIA0882GB
Valve clearance
: Refer to
.
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
JSBIA3308ZZ
: 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
×
×
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