NISSAN X-TRAIL 2003 Electronic Repair Manual

CAMSHAFT
EM-41
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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.
lNo.1 cylinder compression TDC.
lUse 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).
lNo.4 cylinder compression TDC.
9. If out of specifications, adjust as follows.
ADJUSTMENT
lPerform adjustment depending on selected head thickness of valve lifter.
lThe 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 toEM-33, "
Removal and Installation".
2. Remove the valve lifters at the locations that are outside the standard.
KBIA0248E
Cylinder No.1 No.2 No.3 No.4
Valve INT EXH INT EXH INT EXH INT EXH
Measurable´´´x
KBIA0185E
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)
Cylinder No.1 No.2 No.3 No.4
Valve INT EXH INT EXH INT EXH INT EXH
Measurable x´x´
KBIA0249E

EM-42
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CAMSHAFT
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.
lValve lifter thickness calculation.
Thickness of replacement valve lifter = t1+ ( C1 — C2 )
t1 = Thickness of removed valve lifter.
C1 = Measured valve clearance.
C2=Standard valve clearance.
lThickness of a new valve lifter can be identified by stamp
marks on the reverse side (inside the cylinder).
Stamp mark 696 indicates 6.96mm (0.2740in) 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 specifications 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.
Valve clearance:
Unit: mm (in)
*: Approximately 20°C(68°F)
KBIA0057E
Intake : 0.36 mm (0.0142 in)
Exhaust : 0.37 mm (0.0146 in)
KBIA0119E
Cold* (reference data) Hot
Intake 0.24 - 0.32 (0.009 - 0.013) 0.32 - 0.40 (0.013 - 0.016)
Exhaust 0.26 - 0.34( 0.010 - 0.013) 0.33 - 0.41 (0.013 - 0.016)

TIMING CHAIN
EM-43
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TIMING CHAINPFP:13028
Removal and InstallationEBS009R2
KBIA0120E
1 Oil rings 2 Camshaft sprocket (INT) 3 Camshaft sprocket (EXH)
4 Chain tensioner 5 Spring 6 Chain tensioner plunger
7 Timing chain slack guide 8 Timing chain 9 Front cover
10 Chain guide 11Intake valve timing control solenoid
valve12 Intake valve timing control cover
13 Engine mounting bracket 14 Crankshaft pulley bolt 15 Crankshaft pulley
16 Front oil seal 17 Balancer unit timing chain tensioner 18 Oil pump drive spacer
19 Crankshaft sprocket 20 Timing chain tension guide 21 Balancer unit timing chain
22 Balancer unit

EM-44
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TIMING CHAIN
CAUTION:
Apply new engine oil to parts marked in illustration before installation.
REMOVAL
1. Remove the parts listed below.
lEngine hood
lUndercover
lPCV hose
lIgnition coil; Refer toEM-27, "Removal and Installation".
lRocker cover; Refer toEM-31, "Removal and Installation".
lEngine coolant reservoir tank
lAuxiliary drive belt; Refer toEM-13, "Removal and Installation".
lAlternator
lAuxiliary drive belt auto-tensioner; Refer toEM-14, "Removal and Installation of Auxiliary Drive Belt
Auto- tensioner".
lExhaust front tube; Refer toEX-2, "EXHAUST SYSTEM".
2. Remove A/C compressor from engine. Temporarily secure A/C compressor to vehicle side with a rope to
avoid putting a load on them.
3. Remove bracket mounting bolts for fixing A/C piping on right strut housing and exhaust manifold cover.
Doing so simplifies moving.
4. Move power steering pump with piping connected, and secure it to vehicle side temporarily.
5. Pull power steering reservoir tank out of brackets to move power steering piping.
CAUTION:
lTo avoid power steering fluid leakage, temporarily fix reservoir tank vertically.
6. Suspend engine with a hoist, and support the engine posture.
For installation of engine slingers, refer toEM-61, "
ENGINE ASSEMBLY"
7. Remove RH engine mount insulator.
8. Remove center member and rear engine mounting bracket.
9. Drain engine oil.
10. Remove oil pan upper and lower, and oil strainer. Refer toEM-24, "
Removal and Installation".
11. Remove Intake valve timing control cover.
a. Loosen bolts in reverse order shown in the figure.
b. Remove the cover using Tool (Seal cutter).
12. Pull chain guide between camshaft sprockets out through front
cover.
13. Set No.1 cylinder at TDC on its compression stroke with the fol-
lowing procedure.
a. Rotate crankshaft pulley clockwise and align mating marks to
timid indicator on front cover.
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TIMING CHAIN
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b. At the same time, make sure that the mating marks on camshaft
sprockets are located as shown in the figure.
lIf not, rotate crankshaft pulley one more turn to line up mating
marks to the positions in the figure.
14. Remove crankshaft pulley with the following procedure.
a. Fix crankshaft pulley with a pulley holder, loosen crankshaft pul-
ley mounting bolts, and pull the pulley out by 10mm (0.3937in).
b. Attach a pulley puller in the M 6 (0.24 in dia) thread hole on
crankshaft pulley, and remove crankshaft pulley.
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TIMING CHAIN
15. Remove front cover with following procedure.
a. Loosen mounting bolts in the reverse order shown in the figure,
and remove them.
b. Using a seal cutter, remove front cover.
CAUTION:
lBe careful not to damage mounting surface.
16. If front oil seal needs to be replaced, lift it with a screwdriver,
and remove it.
17. Remove timing chain with the following procedure.
a. Push in tensioner plunger. lnsert a stopper pin into hole on ten-
sioner body to fix chain tensioner and remove it.
lUse wire of 0.5mm (0.02in) in diameter as a stopper pin.
b. Secure hexagonal part of camshaft with a tool such as a span-
ner. Loosen camshaft sprocket mounting bolts and remove the
camshaft sprockets.
CAUTION:
lDo not rotate crankshaft or camshaft while timing chain
is removed. It causes interference between valve and pis-
ton.
18. Remove chain slack guide, tension guide, timing chain and oil
pump drive spacer.
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TIMING CHAIN
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19. Remove timing chain tensioner for balancer unit with the follow-
ing procedure.
a. Lift tensioner lever up, and release rachet claw for return proof.
b. Push tensioner sleeve in, and hold it.
c. Matching the hole on lever with the one on body, insert a stopper
pin to secure tensioner sleeve.
d. Remove timing chain tensioner for balancer unit.
20. Remove timing chain for balancer unit and crankshaft sprockets.
21. Loosen mounting bolts in reverse order shown in the figure, and
remove balancer unit.
lUse Torx socket (size E14)
CAUTION:
lDo not disassemble balancer unit.
INSPECTION AFTER REMOVAL
Timing Chain
Check timing chain for cracks or serious wear. If a malfunction is
detected, replace it.
Balancer Unit mounting bolt outer diameter.
lMeasure outer diameters (d1, d2) at the two positions shown in
the figure.
lMeasure d2 within the range A.
lIf the value difference (d1 – d2) exceeds the limit (a dimension
difference is large), replace it with a new one.
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PBIC0282E
Limit : 0.15 mm ( 0. 0059in) or more.
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EM-48
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TIMING CHAIN
INSTALLATION
NOTE:
lThe figure shows the relationship between the mating mark on
each timing chain and that on the corresponding sprocket, with
the components installed.
lBecause of parallel manufacture, there are two types of mark
(link colors) for timing chain.
1. Make suer that crankshaft key points straight up.
2. Tighten mounting bolt in the numerical order shown in the figure
with the following procedure, and install balancer unit.
CAUTION:
lWhen reusing a mounting bolt, check its outer diameter
before installation, Refer toEM-47, "
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 5.2kg-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).
lLoosen 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:
lCheck tightening angle with an angle wrench or a pro-
tractor. Do not make judgment by visual check alone.
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TIMING CHAIN
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3. Install crankshaft sprocket and timing chain for balancer unit.
lMake sure that crankshaft sprocket is positioned with mating
marks on block and sprocket meeting at the top.
lInstall 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.
lBe careful not to let mating marks of each sprocket and timing
chain slip.
lAfter installation, make sure the mating marks have not slipped,
then remove stopper pin and release tensioner.
5. Install timing chain and related parts.
lInstall 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 align-
ment.
CAUTION:
For the above reason, after the mating marks are aligned, keep
them aligned by holding them with a hand.
lBefore and after installing chain tensioner, check again to make
sure that mating marks have not slipped.
lAfter installing chain tensioner, remove stopper pin, and make
sure that tensioner moves freely.
lTo avoid skipped teeth, do not move crankshaft and camshaft
until front cover is installed.
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EM-50
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TIMING CHAIN
6. Install front oil seal to front cover.
lUsing a drift of 56 mm (2.20in) dia, press oil seal in until it is
flush with front end surface of front cover.
CAUTION:
lBe careful not to cause damage or burr to circumfer-
ence 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.
lApplication 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:
lDo not let air conditioning and power steering piping
interfere with upper part of front cover.
lBe careful not to damage front oil seal by interference
with front end of crankshaft.
d. Tighten mounting bolts in the numerical order shown in the fig-
ure.
e. After all bolts are tightened, retighten them to specified torque.
CAUTION:
Be sure to wipe off any excessive liquid gasket leaking to
surface for fitting oil pan.
8. Install chain guide between camshaft sprockets.
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