Nissan X-Trail 32. Manual — part 1046
CAMSHAFT
EM-81
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[MR20DD]
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Removal and Installation
INFOID:0000000010783720
CAUTION:
The rotating direction in the text indicates all directions seen from the engine front.
REMOVAL
1.
Remove the following parts.
• Intake manifold: Refer to
• Rocker cover: Refer to
• Front cover and timing chain related parts: Refer to
NOTE:
Removal of oil pump drive related part is not necessary.
2.
Remove camshaft position sensor (PHASE) and exhaust valve timing control position sensor from cam-
shaft bracket.
CAUTION:
• Handle camshaft position sensor (PHASE) and exhaust valve timing control position sensor
carefully and avoid impacts.
• Never disassemble camshaft position sensor (PHASE) and exhaust valve timing control position
sensor.
• Never place sensor where it is exposed to magnetism.
3.
Put the matching mark
on the camshaft sprocket (INT)
,
camshaft sprocket (EXH)
and the camshaft bracket
as
shown in the figure.
NOTE:
It prevents the knock pin of the camshaft (INT) from engaging
with the incorrect pin hole when installing the camshaft sprocket
(INT).
4.
Remove camshaft sprockets (INT and EXH).
• Secure hexagonal part
of camshaft with a wrench. Loosen
camshaft sprocket mounting bolts and remove camshaft
sprocket.
CAUTION:
• Never rotate crankshaft or camshaft while timing chain
is removed. It causes interference between valve and
piston.
• Never loosen the mounting bolts with securing anything
other than the camshaft hexagonal part or with tensioning the timing chain.
5.
Remove camshaft bracket with the following procedure:
a.
Loosen mounting bolts in reverse order as shown in the figure.
JPBIA4404ZZ
: Camshaft sprocket (INT)
: Camshaft sprocket (EXH)
JPBIA4405ZZ
: Engine front
JPBIA4406ZZ
EM-82
< UNIT DISASSEMBLY AND ASSEMBLY >
[MR20DD]
CAMSHAFT
b.
Cut liquid gasket by prying the position (
) shown in the figure,
and then remove the camshaft bracket.
CAUTION:
• Never damage the mating surface.
• A more adhesive liquid gasket is applied compared to pre-
vious types when shipped, so it should not be forced off
the position not specified.
6.
Remove camshafts.
7.
Remove valve lifters.
• Identify installation positions, and store them without mixing them up.
8.
Remove signal plate from camshaft, if necessary.
INSTALLATION
CAUTION:
Do not reuse O-rings.
1.
Install valve lifters.
• Install them in the original positions.
2.
Install camshafts.
• Clean camshaft journal to remove any foreign material.
• Distinguish between the intake and the exhaust by looking at
the different shapes of the front and rear ends of the camshaft
or using the identification colors
and
.
• Install camshafts so that camshaft dowel pins
on the front
side are positioned as shown in the figure.
NOTE:
Though camshaft does not stop at the positions as shown in
the figure, for the placement of cam nose, it is generally
accepted camshaft is placed for the same direction of the fig-
ure.
3.
Install camshaft bracket with the following procedure:
a.
Remove foreign material completely from camshaft bracket backside and from cylinder head installation
face.
: Engine front
JPBIA4407ZZ
: Camshaft (EXH)
: Camshaft (INT)
Identification color
Camshaft (EXH)
—
Brown
Camshaft (INT)
Purple
—
: Camshaft (EXH)
: Camshaft (INT)
JPBIA4408ZZ
JPBIA4409ZZ
CAMSHAFT
EM-83
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b.
Apply liquid gasket
to camshaft bracket as shown in the fig-
ure.
Use Genuine Liquid Gasket (Three Bond 1217H) or equiva-
lent.
c.
Tighten mounting bolts of camshaft brackets in the following
steps, in numerical order as shown in the figure.
• There are two types of mounting bolts. Refer to the following
for locating bolts.
i.
Tighten mounting bolts in numerical order.
ii.
Tighten mounting bolts in numerical order.
iii.
Tighten mounting bolts in numerical order.
CAUTION:
After tightening mounting bolts of camshaft brackets, be sure to wipe off excessive liquid gasket
from the mating surface of cylinder head.
4.
Install the camshaft sprocket to the camshaft with the following procedure.
: Plug hole inner wall
:
φ
3.4 - 4.4 mm (0.134 - 0.173 in)
: Engine front
: Engine outside
JPBIA4410ZZ
: Engine front
M6 bolts [thread length: 57.5 mm (2.264 in)]
: 13, 14, and 15 in the figure
M6 bolts [thread length: 35.0 mm (1.378 in)]
: Except the above
: 1.96 N·m (0.20 kg-m, 17 in-lb)
: 5.88 N·m (0.60 kg-m, 52 in-lb)
: 9.5 N·m (0.97 kg-m, 84 in-lb)
JPBIA4406ZZ
EM-84
< UNIT DISASSEMBLY AND ASSEMBLY >
[MR20DD]
CAMSHAFT
a.
When the camshaft sprocket (INT)
and camshaft sprocket
(EXH)
is removed, refer to the paint mark
put according to
step “3”. Securely align the knock pin and the pin hole, and then
install them.
b.
Tighten bolts in the following steps.
• Secure the hexagonal part of camshaft using wrench to tighten mounting bolt.
i.
Tighten camshaft mounting bolt.
ii.
Turn 30 degrees clockwise (angle tightening).
CAUTION:
Check the tightening angle by using an angle wrench [SST:
KV10112100] (B) or protractor. Never judge by visual
inspection without an angle wrench.
5.
Install timing chain and related parts. Refer to
.
6.
Inspect and adjust valve clearance. Refer to
EM-16, "Inspection and Adjustment"
7.
Install remaining parts in the reverse order of removal.
Inspection
INFOID:0000000010783721
INSPECTION AFTER REMOVAL
Camshaft Runout
1.
Put V-block on a precise flat table, and support No. 2 and 5 journal of camshaft.
CAUTION:
Never support No. 1 journal (on the side of camshaft sprocket) because it has a different diameter
from the other four locations.
2.
Set dial indicator (A) vertically to No. 3 journal.
3.
Turn camshaft to one direction with hands, and measure the
camshaft runout on dial indicator. (Total indicator reading)
4.
If it exceeds the limit, replace camshaft.
Camshaft Cam Height
: Camshaft bracket
JPBIA4404ZZ
: 35.0 N·m (3.6 kg-m, 26 ft-lb)
: Camshaft sprocket
: Camshaft hexagonal part
JPBIA4412ZZ
Standard and Limit
: Refer to
.
JSBIA2445ZZ
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