2001 NISSAN X-TRAIL lock

EM-42
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TIMING CHAIN
2. Tighten mounting bolt in the numerical order shown in the figure
with the following procedure, and install balancer unit.
CAUTION:
When reusing a mounting bolt, check its outer diameter
before installation, Refer to EM-41, "
INSPECTION AFTER
REMOVAL" .
a. Apply new engine oil to threads and seat surfaces of mounting
bolts.
b. Tighten them to 45.2 to 51.0 N·m (4.6 to 5.2 kg-m, 34 to 37 ft-lb).
c. Turn them another 90 to 95° (Target: 90°).
d. Fully loosen to 0 N·m (0 kg-m, 0 ft-lb).
●Loosen in the reverse order of tightening.
e. Tighten them to 45.2 to 51.0 N·m (4.6 to 5.2 kg-m, 34 to 37 ft-lb).
f. Turn them another 90 to 95° (Target: 90°).
CAUTION:
Check tightening angle with an angle wrench or a protrac-
tor. Do not make judgment by visual check alone.
3. Install crankshaft sprocket and timing chain for balancer unit.
●Make sure that crankshaft sprocket is positioned with mating
marks on block and sprocket meeting at the top.
●Install it by lining up mating marks on each sprocket and tim-
ing chain.
4. Install timing chain tensioner for balancer unit.
NOTE:
Chain guide and tensioner move freely with the caulking pin as
the axle. Therefore, bolt hole position of the three points could
be changed during removal. If points change, temporarily fix the
two mounting bolts on the chain guide, and move the tensioner
to mate the bolt holes.
●Be careful not to let mating marks of each sprocket and timing
chain slip.
●After installation, make sure the mating marks have not
slipped, then remove stopper pin and release tensioner.
KBIA0122E
KBIA0080E
KBIA0123E
KBIA0124E

TIMING CHAIN
EM-43
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5. Install timing chain and related parts.
●Install by lining up mating marks on each sprocket and timing
chain.
NOTE:
Before installing chain tensioner, it is possible to change the
position of mating mark on timing chain for that on each
sprocket for alignment.
CAUTION:
For the above reason, after the mating marks are aligned,
keep them aligned by holding them with a hand.
●Before and after installing chain tensioner, check again to
make sure that mating marks have not slipped.
●After installing chain tensioner, remove stopper pin, and make
sure that tensioner moves freely.
●To avoid skipped teeth, do not move crankshaft and camshaft
until front cover is installed.
6. Install front oil seal to front cover.
●Using a drift of 56 mm (2.20 in) dia, press oil seal in until it is
flush with front end surface of front cover.
CAUTION:
Be careful not to cause damage or burr to circumference of
oil seal.
7. Install front cover with the following procedure.
a. Install O-rings to cylinder head and cylinder block.
b. Apply liquid gasket to positions specified in the figure.
Use Genuine Liquid gasket or equivalent.
●Application instruction differs depending on the part.
c. Make sure that mating marks of timing chain and each sprocket
are still aligned. Then install front cover.
CAUTION:
●Do not let air conditioning and power steering piping
interfere with upper part of front cover.
●Be careful not to damage front oil seal by interference
with front end of crankshaft.
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SBIA0266E
SBIA0267E

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.
KBIA0085E
KBIA0190E
KBIA0115E
KBIA0048E

CAMSHAFT
EM-51
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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

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)
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
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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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SEM715A
SBIA0280E
SEM715A

CYLINDER HEAD
EM-61
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●Intake manifold collector, intake manifold and fuel tube assembly; Refer to EM-16, "INTAKE MANI-
FOLD" .
●Water control valve and housing; Refer to CO-20, "THERMOSTAT AND WATER CONTROL VALVE" .
4. Remove front cover and timing chain. Refer to EM-37, "
TIMING CHAIN" .
5. Remove camshaft. Refer to EM-46, "
CAMSHAFT" .
6. Securely support bottom of cylinder block with a jack or equivalent tool, and remove the hoist that was
supporting it.
7. Remove cylinder head loosening bolts in reverse order shown in
the figure.
INSPECTION AFTER REMOVAL
Outer Diameter of Cylinder Head Bolts
●Cylinder head bolts are tightened by plastic zone tightening
method. Whenever the size difference between d1 and d2
exceeds the limit, replace them with new one.
●If reduction of outer diameter appears in a position other than
d2, use it as d2 point.
INSTALLATION
1. Install cylinder head gasket.
2. Follow the steps below to tighten fixing bolts in the order shown
in figure to install cylinder head.
CAUTION:
●If cylinder head bolts are re-used, check their outer diam-
eters before installation. Refer to EM-61, "
Outer Diameter
of Cylinder Head Bolts" .
●In step “c”, loosen bolts in the reverse order of that indi-
cated in figure.
a. Apply new engine oil to threads and seating surface of mounting
bolts.
b. Tighten all bolts to 98.1 N·m (10 kg-m, 72 ft-lb).
c. Completely loosen to 0 N·m (0 kg-m, 0 ft-lb).
d. Tighten all bolts to 34.3 to 44.1 N·m (3.5 to 4.5 kg-m, 26 to 32 ft-lb).
e. Turn all bolts 75° to 80° (target: 75°) degrees clockwise.
KBIA0058E
Limit (d1 – d2): More than 0.23 mm (0.0091 in).
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KBIA0058E

EM-62
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CYLINDER HEAD
f. Turn all bolts 75° to 80° (target: 75°) degrees clockwise again.
CAUTION:
Check and confirm the tightening angle by using angle
wrench or protractor. Avoid judgment by visual inspection
without the tool.
3. Install followings in reverse order of removal.
Disassembly and AssemblyEBS00KNR
CAUTION:
●When installing camshafts, chain tensioners, oil seals or other sliding parts, lubricate contacting
surface with new engine oil.
●Apply new engine oil to threads and seat surface when installing cylinder head, camshaft
sprocket, crankshaft pulley and camshaft bracket.
●Attach tags to valve lifters so as not to mix them up.
KBIA0059E
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1. Valve Collet 2. Valve spring retainer 3. Valve spring (with valve spring seat)
4. Valve oil seal 5. Valve guide 6. Cylinder head
7. Valve seat (INT) 8. Valve (INT) 9. Valve (EXH)
10. Valve seat (EXH) 11. Spark plug 12. Spark plug tube