2001 NISSAN X-TRAIL crankshaft

TIMING CHAIN
EM-45
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●Secure crankshaft pulley with a pulley holder, and tighten the bolt.
●Perform angle tightening with the following procedure.
a. Apply new engine oil to thread and seat surfaces of mounting bolt.
b. Tighten to 37.3 to 47.1 N·m (3.8 to 4.8 kg-m, 28 to 34 ft-lb).
c. put a paint mark on front cover, mating with any one of six easy
to recognize stamp marks on bolt flange.
d. Turn another 60° to 66° [Target: 60°].
●Check vertical mounting angle with movement of one stamp
mark.
12. Install remaining parts in reverse order of removal.
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CAMSHAFT
EM-47
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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.
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EM-48
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CAMSHAFT
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.
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Intake : Signal plate shape for camshaft position
(PHASE) sensor.
Exhaust : Cone end shape.
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CAMSHAFT
EM-53
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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)
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Measuring position No.1 CYL. No.2 CYL. No.3 CYL. No.4 CYL.
No.1 cylinder at
TDCINT X X
EXH X X
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EM-54
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CAMSHAFT
●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
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Intake : 0.36 mm (0.0142 in)
Exhaust : 0.37 mm (0.0146 in)

CAMSHAFT
EM-55
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●Thickness of a new valve lifter can be identified by stamp
marks on the reverse side (inside the cylinder).
Stamp mark 696 indicates 6.96 mm (0.2740 in) in thickness.
Available thickness of valve lifter: 26 sizes with range 6.96 to
7.46 mm (0.2740 to 0.2937 in) in steps of 0.02 mm (0.0008 in)
(when manufactured at factory).
5. Install the selected valve lifter.
6. Install camshaft.
7. Manually turn crankshaft pulley a few turns.
8. Check that valve clearances for cold engine are within specifica-
tions by referring to the specified values.
9. After completing the repair, check valve clearances again with the specifications for warmed engine. Make
sure the values are within specifications.
*: Reference data at approximately 20°C (68°F) Valve clearance standard:
Hot Intake : 0.32 - 0.40 mm (0.013 - 0.016 in)
Exhaust : 0.33 - 0.41 mm (0.013 - 0.016 in)
Cold* Intake : 0.24 - 0.32 mm (0.009 - 0.013 in)
Exhaust : 0.26 - 0.34 mm (0.010 - 0.013 in)
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EM-56
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OIL SEAL
OIL SEAL
PFP:12279
Removal and Installation of Valve Oil SealEBS00KNM
REMOVAL
1. Remove camshaft. Refer to EM-46, "CAMSHAFT" .
2. Remove valve lifter. Refer to EM-46, "
CAMSHAFT" .
3. Rotate crankshaft, and set piston whose oil seal is to be
removed to top dead center. This prevents valve from dropping
inside cylinder.
CAUTION:
When rotating crankshaft, be careful to avoid scarring the
front cover with the timing chain.
4. Remove valve collet, valve spring retainer and valve spring with
SST. Refer to EM-59, "
CYLINDER HEAD" .
5. Remove valve oil seal with SST.
INSTALLATION
1. Apply new engine oil to valve oil seal joint surface and seal lip.
2. Press in valve oil seal to the position shown in the figure with
SST.
3. Install followings in the reverse order of removal.
Removal and Installation of Front Oil SealEBS00KNN
REMOVAL
1. Remove the parts listed below.
●Under cover (with splash cover).
●Drive belts. Refer to EM-12, "DRIVE BELTS" .
●Crank pulley. Refer to EM-37, "TIMING CHAIN" .
2. Remove front oil seal.
CAUTION:
Be careful not to damage front cover and crankshaft.
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SEM093F
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OIL SEAL
EM-57
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INSTALLATION
1. Apply new engine oil to new front oil seal joint surface and seal
lip.
2. Press in front oil seal to the position in the figure with suitable
tool.
CAUTION:
●Be careful not to damage front cover.
●Press fit oil seal straight to avoid causing burrs or tilting.
●Refer to figure for press fit direction of front oil seal.
3. Install followings in the reverse order of removal.
Removal and Installation of Rear Oil SealEBS00KNO
REMOVAL
1. Remove transaxle or automatic transaxle assembly. Refer to MT-15, "TRANSAXLE ASSEMBLY" (M/T) or
AT- 4 1 8 , "
REMOVAL AND INSTALLATION" (A/T).
2. Remove rear oil seal.
CAUTION:
Be careful not to damage crankshaft and cylinder block.
INSTALLATION
1. Apply new engine oil to new rear oil seal joint surface and seal lip.
2. Install rear oil seal with a suitable drift.
CAUTION:
●Do not touch grease applied onto oil seal lip.
●Be careful not to damage crankshaft and cylinder block.
●Press fit oil seal straight to avoid causing burrs or tilting.
●Refer to figure for press fit direction of rear oil seal.
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