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4. Remove Intake valve timing control cover.
a. Loosen bolts in reverse order shown in the figure.
b. Disconnect intake valve timing control solenoid NISSAN X-TRAIL 2001 Service Repair Manual CAMSHAFT
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4. Remove Intake valve timing control cover.
a. Loosen bolts in reverse order shown in the figure.
b. Disconnect intake valve timing control solenoid](/manual-img/5/57405/w960_57405-96.png)
CAMSHAFT
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4. Remove Intake valve timing control cover.
a. Loosen bolts in reverse order shown in the figure.
b. Disconnect intake valve timing control solenoid valve harness
connector, and remove intake valve timing control solenoid
valve.
c. Remove the cover using Tool (Seal cutter).
5. Set No. 1 cylinder at TDC on its compression stroke with the fol-
lowing procedure.
a. Open splash cover on RH undercover.
b. Rotate crankshaft pulley clockwise, and align mating marks for
TDC with timing indicator on front cover.
c. At the same time, make sure that the mating marks on camshaft
sprockets are located as shown in the figure.
●If not, rotate crankshaft pulley one more turn to line up the
mating marks to the positions in the figure.
6. Pull chain guide between camshaft sprockets out through front
cover.
7. Remove camshaft sprockets with the following procedure.
a. Line up the mating marks on camshaft sprockets, and paint an
indelible mating mark on timing chain link plate.
b. Push in tensioner plunger. Insert a stopper pin into hole on ten-
sioner body to fix chain tensioner and remove it.
●Use wire of 0.5 mm (0.02 in) in diameter as a stopper pin.
KBIA0085E
KBIA0190E
KBIA0115E
KBIA0048E
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c. Secure hexagonal part of camshaft with a tool such as a span-
ner. Loosen camshaft sprocket mounting bolts and remove the
camshaft sprockets.
CAUTION:
Do not NISSAN X-TRAIL 2001 Service Repair Manual EM-48
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c. Secure hexagonal part of camshaft with a tool such as a span-
ner. Loosen camshaft sprocket mounting bolts and remove the
camshaft sprockets.
CAUTION:
Do not](/manual-img/5/57405/w960_57405-97.png)
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c. Secure hexagonal part of camshaft with a tool such as a span-
ner. Loosen camshaft sprocket mounting bolts and remove the
camshaft sprockets.
CAUTION:
Do not rotate crankshaft or camshaft while timing chain is
removed. It causes interference between valve and piston.
NOTE:
Chain tension holding work is not necessary. Crank sprocket
and timing chain do not disconnect structurally while front cover
is attached.
8. Loosen mounting bolts in the reverse order shown in the figure,
and remove camshaft brackets and camshafts.
●Remove No. 1 camshaft bracket by slightly tapping it with a
soft tool such as a plastic hammer.
9. Remove valve lifter.
●Check mounting positions, and store them without mixing
them up.
INSTALLATION
1. Install valve lifter.
●Install them in the same positions they were in prior to removal.
2. Install camshaft.
●Distinction between intake and exhaust camshafts is per-
formed with a difference of shapes of rear end.
●Install camshafts so that dowel pins on the front side are posi-
tioned as shown in the figure.
KBIA0049E
SBIA0255E
Intake : Signal plate shape for camshaft position
(PHASE) sensor.
Exhaust : Cone end shape.
KBIA0246E
KBIA0051E
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3. Install camshaft brackets.
●Install by referring to identification mark on upper surface
mark.
●Install so that identification mark can be correctly read when
viewed from the exhaust side.
●Install No. 1 camshaft bracket as follow.
–Apply liquid gasket to No. 1 camshaft bracket as in illustration.
Use Genuine Liquid Gasket or equivalent.
CAUTION:
After installation, be sure to wipe off any excessive liquid
gasket leaking from part “A” (both on right and left
sides).
●Apply liquid gasket to camshaft bracket contact surface on the
front cover backside.
●Apply liquid gasket to the outside of bolt hole on front cover.
Use Genuine Liquid Gasket or equivalent.
●For No. 1 camshaft bracket near mounting position, and
install it without disturbing the liquid gasket applied to the sur-
faces.
SBIA0256E
SBIA0257E
SBIA0258E
SBIA0259E
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4. Tighten fixing bolts of camshaft brackets as follows.
a. Tighten in the order from No. 9 to 11 with tightening torque 2. 0
N·m (0.2 kg-m, 17 in-lb).
b. Tighten in the order NISSAN X-TRAIL 2001 Service Repair Manual EM-50
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4. Tighten fixing bolts of camshaft brackets as follows.
a. Tighten in the order from No. 9 to 11 with tightening torque 2. 0
N·m (0.2 kg-m, 17 in-lb).
b. Tighten in the order](/manual-img/5/57405/w960_57405-99.png)
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4. Tighten fixing bolts of camshaft brackets as follows.
a. Tighten in the order from No. 9 to 11 with tightening torque 2. 0
N·m (0.2 kg-m, 17 in-lb).
b. Tighten in the order from No. 1 to 8 with tightening torque 2.0
N·m (0.2 kg-m, 17 in-lb).
c. Tighten all bolts in the specified order with tightening torque 5.9
N·m (0.6 kg-m, 52 in-lb).
d. Tighten in the order from No. 1 to 11 with tightening torque 9.0 to
11.8 N·m (0.92 to 1.20 kg-m, 80 to 104 in-lb).
CAUTION:
After tightening fixing bolts of camshaft brackets, be sure
to wipe off excessive liquid gasket from the parts listed below.
●Mating surface of rocker cover.
●Mating surface of front cover. (When installed without front cover)
5. Install camshaft sprockets.
●Install them by lining up the mating marks on each camshaft
sprocket with the ones painted on the timing chain during
removal.
●Before installation of chain tensioner, it is possible to re-match
the marks on timing chain with the ones on each sprocket.
CAUTION:
●Aligned mating marks could slip. Therefore, after
matching them, hold the timing chain in place by hand.
●Before and after installing chain tensioner, check again
to make sure that mating marks have not slipped.
6. Install chain tensioner.
CAUTION:
After installation, pull the stopper pin off completely, and make sure that tensioner is released.
7. Install chain guide.
8. Install Intake valve timing control cover with the following proce-
dure.
a. Install Intake valve timing control solenoid valve to intake valve
timing control cover.
b. Install O-ring to front cover side.
c. Apply liquid gasket to the positions shown in the figure.
Use Genuine Liquid Gasket or equivalent.
d. Install Intake valve timing control cover.
●Tighten bolts in numerical order shown in the figure.
9. Check and adjust valve clearances. Refer to EM-53, "
Va l v e
Clearance" .
10. For the following operations, perform steps in the reverse order
of removal.
SBIA0255E
KBIA0115E
SBIA0260E
KBIA0085E
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INSPECTION AFTER REMOVAL
Camshaft Runout
●Put V-block on a precise flat table, and support No. 2 and 5 jour-
nal of camshaft.
●Set dial gauge vertical NISSAN X-TRAIL 2001 Service Repair Manual CAMSHAFT
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INSPECTION AFTER REMOVAL
Camshaft Runout
●Put V-block on a precise flat table, and support No. 2 and 5 jour-
nal of camshaft.
●Set dial gauge vertical](/manual-img/5/57405/w960_57405-100.png)
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INSPECTION AFTER REMOVAL
Camshaft Runout
●Put V-block on a precise flat table, and support No. 2 and 5 jour-
nal of camshaft.
●Set dial gauge vertically to No. 3 journal.
●Turn camshaft to one direction with hands, and measure cam-
shaft runout on dial gauge. (Total indicator reading)
Camshaft Cam Height
1. Measure camshaft cam height.
2. If wear is beyond the limit, replace camshaft.
Camshaft Journal Clearance
Outer Diameter of Camshaft Journal
Measure outer diameter of camshaft journal.
Inner Diameter of Camshaft Bracket
●Tighten camshaft bracket bolt with specified torque.
●Using inside micrometer, measure inner diameter of camshaft
bracket.
Calculation of Camshaft Journal Clearance
(Journal clearance) = (inner diameter of camshaft bracket) – (outer
diameter of camshaft journal).
●When out of the specified range above, replace either or both camshaft and cylinder head.
NOTICE:
Inner diameter of camshaft bracket is manufactured together with cylinder head. Replace the whole cylin-
der head assembly.Standard: Less than 0.02 mm (0.0008 in).
PBIC0038E
Standard cam height:
Intake : 45.665 - 45.855 mm (1.7978 - 1.8053 in)
Exhaust
QR20DE : 42.825 - 43.015 mm (1.6860 - 1.6935 in)
QR25DE : 43.975 - 44.165 mm (1.7313 - 1.7388 in)
PBIC0039E
Standard outer diameter:
No. 1 : 27.935 - 27.955 mm (1.0998 - 1.1006 in)
No. 2, 3, 4, 5 : 23.435 - 23.455 mm (0.9226 - 0.9234 in)
PBIC0040E
Standard:
No. 1 : 28.000 - 28.021 mm (1.1024 - 1.1032 in)
No. 2, 3, 4, 5 : 23.500 - 23.521 mm (0.9252 - 0.9260 in)
Standard: 0.045 - 0.086 mm (0.0018 - 0.0034 in)
PBIC0041E
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Camshaft End Play
●Install dial gauge in thrust direction on front end of camshaft.
Measure end play of dial gauge when camshaft is moved for-
ward/backward (in direction to axis).
●When out of the specified range, replace with new camshaft and
measure again.
●When out of the specified range again, replace with new cylinder
head.
Camshaft Sprocket Runout
1. Install camshaft in cylinder head.
2. Install camshaft sprocket to camshaft.
3. Measure camshaft sprocket runout.
4. If it exceeds the limit, replace camshaft sprocket.
Valve Lifter
Check if surface of valve lifter has any wear or cracks.
Valve Lifter Clearance
Outer Diameter of Valve Lifter
Measure outer diameter of valve lifter.Standard: 0.115 - 0.188 mm (0.0045 - 0.0074 in)
PBIC0042E
Runout: Less than 0.15 mm (0.0059 in)
KBIA0181J
KBIA0182E
Valve lifter outer diameter:
33.965 - 33.980mm (1.3372 - 1.3378 in)
SEM961E
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Valve Lifter Hole Diameter
Using inside micrometer, measure diameter of valve lifter hole of cyl-
inder head.
Calculation of Valve Lifter Clearance
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Valve Lifter Hole Diameter
Using inside micrometer, measure diameter of valve lifter hole of cyl-
inder head.
Calculation of Valve Lifter Clearance
(Valve](/manual-img/5/57405/w960_57405-102.png)
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Valve Lifter Hole Diameter
Using inside micrometer, measure diameter of valve lifter hole of cyl-
inder head.
Calculation of Valve Lifter Clearance
(Valve lifter clearance) = (hole diameter of valve lifter) – (outer diam-
eter of valve lifter).
●When out of specified range, referring to each specification of
outer and inner diameter, replace either or both valve lifter and
cylinder head.
Va l v e C l e a r a n c eEBS00LS3
INSPECTION
Perform inspection as follows after removal, installation or replacement of camshaft or valve-related parts, or if
there is unusual engine conditions due to changes in valve clearance over time (starting, idling, and/or noise).
1. Warm up engine. Then stop it.
2. Remove splash cover on RH undercover.
3. Remove rocker cover. Refer to EM-35, "
ROCKER COVER" .
4. Turn crankshaft pulley in normal direction (clockwise when
viewed from front) to align TDC identification notch (without
paint mark) with timing indicator.
5. At this time, check that the both intake and exhaust cam noses
of No. 1 cylinder face outside.
●If they do not face outside, turn crankshaft pulley once more.
6. By referring to the figure, measure valve clearances at locations
marked X as shown in the table below (locations indicated with
black arrow in figure) with a feeler gauge.
●No. 1 cylinder compression TDC.Standard: 34.000 - 34.021 mm (1.3386 - 1.3394 in)
Standard: 0.020 - 0.056 mm (0.0008 - 0.0022 in)
PBIC0043E
KBIA0190E
KBIA0400J
Measuring position No.1 CYL. No.2 CYL. No.3 CYL. No.4 CYL.
No.1 cylinder at
TDCINT X X
EXH X X
SBIA0261E
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●Use a feeler gauge, measure clearance between valve and
camshaft.
*: Reference data at approximately 20°C (68°F)
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●Use a feeler gauge, measure clearance between valve and
camshaft.
*: Reference data at approximately 20°C (68°F)
CAUTION:
If inspection was carried out with cold engi](/manual-img/5/57405/w960_57405-103.png)
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●Use a feeler gauge, measure clearance between valve and
camshaft.
*: Reference data at approximately 20°C (68°F)
CAUTION:
If inspection was carried out with cold engine, check that
values with fully warmed up engine are still within specifications.
7. Turn crankshaft one revolution (360°) and align mark on crankshaft pulley with pointer.
8. By referring to the figure, measure valve clearances at locations
marked X as shown in the table below (locations indicated with
black arrow in figure).
●No.4 cylinder compression TDC.
9. If out of specifications, adjust as follows.
ADJUSTMENT
●Perform adjustment depending on selected head thickness of valve lifter.
●The specified valve lifter thickness is the dimension at normal temperatures. Ignore dimensional differ-
ences caused by temperature. Use the specifications for hot engine condition to adjust.
1. Remove camshaft. Refer to EM-46, "
REMOVAL" .
2. Remove the valve lifters at the locations that are outside the standard.
3. Measure the center thickness of the removed valve lifters with a
micrometer.
4. Use the equation below to calculate valve lifter thickness for replacement.
●Valve lifter thickness calculation.
t = t1 + (C1 – C2)
t = Thickness of replacement valve lifter
t1 = Thickness of removed valve lifter.
C1 = Measured valve clearance.
C2 = Standard valve clearance in cold condition [approximately 20°C (68°F)]. Valve clearance standard:
Hot Intake : 0.304 - 0.416 mm (0.012 - 0.016 in)
Exhaust : 0.308 - 0.432 mm (0.012 - 0.017 in)
Cold* Intake : 0.24 - 0.32 mm (0.009 - 0.013 in)
Exhaust : 0.26 - 0.34 mm (0.010 - 0.013 in)
Measuring position No.1 CYL. No. 2 CYL. No.3 CYL. No.4 CYL.
No.4 cylinder at
TDCINT X X
EXH X X
KBIA0185E
SBIA0262E
KBIA0057E
Intake : 0.36 mm (0.0142 in)
Exhaust : 0.37 mm (0.0146 in)