engine NISSAN X-TRAIL 2003 Electronic Repair Manual

CAMSHAFT
EM-149
[YD22DDTi]
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CAMSHAFTPFP:13001
Removal and InstallationEBS00BOI
CAUTION:
Apply new engine oil to parts marked in illustration before installation.
lThis engine will have a different valve arrangement from normal
DOHC 4-valve type engines. As both camshafts on this engine
have intake and exhaust camshafts, in this chapter they are
named as follows:
lRefer to the figure for intake and exhaust valve arrangement.
(The camshafts have, alternately, either an intake valve or an
exhaust valve.)
REMOVAL
1. Drain engine coolant. Refer toCO-30, "Changing Engine Coolant".
2. Remove charge air cooler. Refer toEM-114, "
Removal and Installation".
3. Remove air duct and air inlet pipe. Refer toEM-112, "
Removal and Installation".
4. Remove rocker cover. Refer toEM-147, "
Removal and Installation".
5. Remove vacuum pump. Refer toEM-131, "
Removal and Installation".
SBIA0177E
1. Camshaft bracket 2. Camshaft (right side) 3. Camshaft ( left side)
4. Camshaft sprocket (right side) 5. Camshaft sprocket (left side) 6. Adjusting shim
7. Valve lifter 8. Cylinder head
.
Camshaft (Right side) : Intake manifold side
Camshaft (Left side) : Exhaust manifold side
SBIA0178E

EM-150
[YD22DDTi]
CAMSHAFT
6. Remove injection tube and fuel injector. Refer toEM-135, "Removal and Installation".
7. Remove secondary timing chain. Refer toEM-158, "
Removal and Installation".
8. Set the No. 1 cylinder at TDC on its compression stroke.
9. Remove the camshaft stroke.
lLoosen the camshaft gear installation bolt by fixing the hexag-
onal portion of the camshaft.
10. Remove the camshaft.
lPlace distinguishing marks on the right and left sides with
paint.
lLoosen and remove the installation bolt in reverse order
shown in the figure.
11. Remove the adjusting shim and valve lifter.
lRemove by taking notice of the installation position, and place
outside engine in order to prevent confusion.
INSPECTION AFTER REMOVAL
Visual Check of Camshaft
lCheck the camshaft for one sided wear or scratches.
lReplace the camshaft if there are abnormalities.
Camshaft Runout
lPrepare V-block on a flat surface and secure camshaft journals
No. 1 and No. 5.
lSet the dial gauge vertically on journal No. 3.
lRotate camshaft in one direction by hand, then read needle
movement on dial indicator. (Total indicator reading)
Height of Cam Nose
Measure by using a micrometer.
JEM159G
JEM160G
Limit : 0.04 mm (0.0016 in)
JEM161G
Standard:
Intake : 39.505 - 39.695 mm (1.5553 - 1.5628 in
Exhaust : 39.905 - 40.095 mm (1.5711 - 1.5785 in)
SEM549A

EM-154
[YD22DDTi]
CAMSHAFT
Valve Clearance
EBS00BOJ
INSPECTION
lWhen the camshaft or parts in connection with valves are
removed or replaced, and a malfunction has occurred (poor
starting, idling, or other malfunction) due to the mis adjustment
of the valve clearance, inspect as follows.
lInspect and adjust when the engine is cool (at normal tempera-
ture).
lBe careful of the intake and exhaust valve arrangement. The
valve arrangement is different from that in a normal engine.
NOTE:
The camshafts have, alternately, either an intake valve or an
exhaust valve.(Refer to illustration)
1. Drain engine coolant. Refer toCO-30, "
Changing Engine Coolant".
2. Remove charge air cooler. Refer toEM-114, "
Removal and Installation".
3. Remove air duct and air inlet pipe. Refer toEM-112, "
Removal and Installation".
4. Remove rocker cover. Refer toEM-147, "
Removal and Installation".
5. Remove vacuum pump. Refer toEM-131, "
Removal and Installation".
6. Remove injection tube and fuel injector. Refer toEM-135, "
Removal and Installation".
7. Remove secondary timing chain. Refer toEM-158, "
Removal and Installation"
Check valve clearance while engine is cold and not running.
8. Set the No. 1 piston to TDC on its compression stroke.
lTurn crankshaft pulley clockwise so that the knock pin on
camshaft LH faces straight above. (No position indicator, etc.
is provided on the crankshaft pulley.)
9. Put an alignment mark with paint, etc. on the crankshaft pulley
and on the oil pump as an angle indicator.
10. While referring to the figure, measure the valve clearance
marked in the table below.
lThe injection order is 1-3-4-2.
SBIA0178E
SBIA0179E
JEM177G
Measuring pointNo. 1 No. 2 No. 3 No. 4
INT EXH INT EXH INT EXH INT EXH
When the No. 4
cylinder is in the
TDCXXX X
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CAMSHAFT
EM-155
[YD22DDTi]
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lMeasure the valve clearance using a fine feeler gauge when
the engine is cool (at normal temperature).
11. Set the No. 4 cylinder at TDC by rotating the crankshaft clock-
wise once.
12. While referring to the figure, measure the valve clearance
marked in the table below.
13. If the valve clearance is outside the specification, adjust as fol-
lows.
ADJUSTMENTS
lRemove the adjusting shim for parts which are outside the spec-
ified valve clearance.
1. Remove the spill tube. Refer toEM-135, "
Removal and Installa-
tion".
2. Extract the engine oil on the upper side of the cylinder head (for
theairblowinginstep7).
3. Rotate the crankshaft to face the camshaft for adjusting shims
that are to be removed upward.
4. Grip the camshaft with camshaft pliers, them using the camshaft
as a support point, push the adjusting shim downward to com-
press the valve spring.
CAUTION:
Do not damage the camshaft, cylinder head and the outer
circumference of the valve lifter.Valve clearance (Cold):
Standard:
Intake : 0.24 - 0.32 mm (0.0094 - 0.0126 in)
Exhaust : 0.26 - 0.34 mm (0.0102 - 0.0134 in)
SBIA0181E
Measuring pointNo. 1 No. 2 No. 3 No. 4
INT EXH INT EXH INT EXH INT EXH
When the No. 4
cylinder is in the
TDCXX XX
SBIA0182E
SBIA0183E
SBIA0184E

EM-158
[YD22DDTi]
SECONDARY TIMING CHAIN
SECONDARY TIMING CHAIN
PFP:13028
Removal and InstallationEBS00BOG
CAUTION:
lAfter removing timing chain, do not turn crankshaft and camshaft separately, or valves will strike
piston heads.
lWhen installing camshafts, chain tensioners, oil seals or other sliding parts, lubricate contacting
surfaces with new engine oil.
lApply new engine oil to parts marked in illustration before installation.
REMOVAL
lFor preparative work for removing/installing secondary timing chain to remove/install electronic fuel supply
pump. Refer toEM-138, "
FUEL SUPPLY PUMP".
lTo prepare for removing/installing secondary timing chain to remove/install camshaft. Refer toEM-149,
"Removal and Installation".
1. Remove coolant reservior tank.
2. Remove RH engine mount insulator and bracket. Rfer toEM-184, "
Removal and Installation".
3. Pull power steering reservoir tank out of brackets to move power steering piping.
CAUTION:
To avoid removing power steering reservoir tank out of brackets move it with power steering pip-
ing aside.
SBIA0188E

SECONDARY TIMING CHAIN
EM-159
[YD22DDTi]
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4. Remove front chain case.
lLoosen fixing bolts in the reverse order of that shown in the
figure and remove them.
lRemove No. 6, 10 and 11 bolts with the rubber washer as
space is limited for pulling them out.
CAUTION:
lWhile front chain case is removed, cover openings to
prevent entry of foreign material into engine.
lDo not remove two mass dampers on the back of cover.
5. Set the No. 1 piston to TDC on its compression stroke.
lTurn crankshaft pulley clockwise so that the alignment mark
(punched mark) on each camshaft sprocket is positioned as
showninthefigure.
lNo position indicator is provided on the crankshaft pul-
ley.
lWhen installing, color coded links on the secondary tim-
ing chain can be used as alignment marks. Marking may
not be necessary for removal; however, make alignment
marks as required because the alignment mark on fuel
supply pump sprocket may not be easy to see.
6. Remove chain tensioner.
a. Push the plunger of chain tensioner and keep it pressed with a
push pin.
b. Using a hexagon-head wrench [face to face: 5 mm, (0.20 in)
SST], remove bolts to remove chain tensioner.
JEM121G
SBIA0189E
SEM515G
JEM124G
SBIA0227E

PRIMARY TIMING CHAIN
EM-163
[YD22DDTi]
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PRIMARY TIMING CHAINPFP:13028
Removal and InstallationEBS00BR5
CAUTION:
lAfter removing timing chain, do not turn crankshaft and camshaft separately, or valves will strike
piston heads.
lWhen installing camshafts, chain tensioners, oil seals or other sliding parts, lubricate contacting
surfaces with new engine oil.
lApply new engine oil to parts marked in illustration before installation.

PRIMARY TIMING CHAIN
EM-165
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REMOVAL
1. Remove coolant reservior tank.
2. Remove charge air cooler. Refer toEM-114, "
Removal and Installation".
3. Remove oil cleaner and air duct. Refer toEM-112, "
Removal and Installation".
4. Remove rocker cover. Refer toEM-147, "
Removal and Installation".
5. Remove RH engine mount insulator and bracket. Refer toEM-184, "
Removal and Installation".
6. Pull power steering reservoir tank out of brackets to move power steering piping.
CAUTION:
To avoid removing power steering reservoir tank out of brackets move it with power steering pip-
ing aside.
7. Remove oil pan. Refer toEM-125, "
Removal and Installation".
8. Remove oil filter bracket. Refer toLU-22, "
Removal and Installation".
9. Remove injection tube and fuel injector. Refer toEM-135, "
Removal and Installation".
10. Remove secondary timing chain and associated parts. Refer toEM-158, "
Removal and Installation".
11. When removing rear chain case, remove camshaft sprockets. Refer toEM-149, "
Removal and Installa-
tion".
12. Remove crankshaft pulley.
a. Hold crankshaft pulley with the pulley holder (SST).
b. Loosen crankshaft pulley fixing bolt and pull out the bolt approx-
imately 10 mm (0.39 in).
c. Using pulley puller (SST), remove crankshaft pulley.
lUse two M6 bolts with approx. 60 mm (2.36 in) shank length
for securing crankshaft pulley.
7. Chain guide 8. Spacer 9. Front chain case
10. Crankshaft pully 11. Front oil seal 12. Oil pump
13. Primary timing chain 14. Oil pump drive sprocket 15. Crankshaft sprocket
16. Secondary timing chain 17. Rear chain case 18. Power steering pump
JEM131G
JEM132G

EM-168
[YD22DDTi]
PRIMARY TIMING CHAIN
INSPECTION AFTER REMOVAL
Timing Chain
Check for cracks and excessive wear at roller links. Replace
chain if necessary.
INSTALLATION
1. Install rear chain case.
a. Apply a continuous bead of Genuine Liquid Gasket or eqivalent
on locations shown in the figure. Refer toEM-103, "
Precautions
for Liquid Gasket".
A: Apply bead so that it does not protrude into the oil passage.
B, C: Minimize overlapping area of bead, by starting and ending
at areas of bead as shown in the figure. Apply so that the portion
marked * comes at an external location but cannot be viewed
externally after engine assembly.
D: Leave the start and end areas of the bead slightly protruding
from the case surface.
SEM984C
JEM139G
SBIA0212E

EM-170
[YD22DDTi]
PRIMARY TIMING CHAIN
6. Install primary timing chain with fuel supply pump sprocket.
lWhen installing, match the alignment marks on sprockets with
color coded alignment marks (colored links) on the chain.
lInstall fuel supply pump sprocket washer with the surface
marked “F” (front mark) facing the front of the engine.
7. Install timing chain onto power steering pump sprocket and
through chain guide.
8. Use the positioning stopper pin (SST) to hold the fuel supply
pump sprocket and install the bolt.
lUsing a TORX wrench (SST), turn the pump shaft little by little
to adjust the position of the pump flange. Insert positioning
stopper pin (SST) into the hole 6 mm (0.24 in) in diameter on
the fuel supply pump sprocket so that the stopper pin goes
through the pump flange to the pump body. While the stopper
pinisinplace,installthebolt.
9. Install timing chain slack guide.
10. Install chain tensioner.
lPush the plunger of the chain tensioner. While keeping
plunger pressed down with a push pin, etc., install the chain
tensioner.
lAfter installation, pull out the push pin holding the plunger.
lCheck again that the alignment marks on the sprockets
and the colored alignment marks on timing chain are
aligned.
11. Install front oil seal to oil pump.
lUsing a suitable drift [62 mm (2.44 in) dia.], force fit the seal
until it hits the bottom.
lDo not touch lips of oil seal. Make sure seal surfaces are
free of foreign materials.
JEM136G
SBIA0208E
SBIA0209E
JEM134G
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