NISSAN X-TRAIL 2003 Electronic Repair Manual

CAMSHAFT
EM-151
[YD22DDTi]
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Camshaft Oil Clearance
Measure by using a micrometer.
Camshaft Bracket Inner Diameter
lInstall camshaft bracket and tighten bolts to the specified torque.
lMeasure inner diameter of camshaft bracket using an inside
micrometer.
Camshaft Oil Clearance Calculations
(Oil clearance) = (Camshaft bracket inner diameter) – (Camshaft journal outer diameter)
lIf it exceeds the standard value, refer to the standard value of each unit, then replace the camshaft and/or
cylinder head.
NOTE:
As the camshaft bracket is manufactured with the cylinder head, it is impossible to replace only the camshaft
bracket.
Camshaft End Play
lSet the dial gauge to the front end of the camshaft. Measure the
end play by moving the camshaft in the direction of the axle.
lIf end play exceeds the limit, replace camshaft and measure
camshaft end play again.
lIf end play still exceeds the limit after replacing camshaft,
replace cylinder head.Camshaft journal outer diameter:
Standard:
NO. 1 : 30.435 - 30.455 mm
(1.1982 - 1.1990 in) dia.
NO.2,3,4,5 :23.935-23.955mm
(0.9423 - 0.9431 in) dia.
SEM012A
Camshaft bracket inner diameter:
Standard:
NO. 1 : 30.500 - 30.521 mm
(1.2008 - 1.2016 in) dia.
NO. 2, 3, 4, 5 : 24.000 - 24.021 mm
(0.9449 - 0.9457 in) dia.
JEM162G
Standard : 0.045 - 0.086 mm (0.0018 - 0.0034 in) dia.
Standard : 0.070 - 0.148 mm (0.0028 - 0.0058 in)
Limit : 0.24 mm (0.0094 in)
PBIC0366E

EM-152
[YD22DDTi]
CAMSHAFT
Camshaft Sprocket Runout
1. Install sprocket on camshaft.
2. Measure camshaft sprocket runout.
3. If it exceeds the limit, replace camshaft sprocket.
Visual Inspection of Valve Lifter and Adjusting Shim
lCheck lifter side for any signs of wear or damage. Replace if
there are any abnormalities.
lCheck cam nose contact and sliding surfaces for wear and
scratches. Replace if there are any abnormalities.
Valve Lifter Bore Diameter
Measure the outer diameter of the valve lifter with a micrometer.
Valve Lifter Inner Diameter
Measure the bore diameter of the cylinder head valve lifter with an
inside micrometer.
Valve Lifter Clearance Calculations
(Clearance) = (Valve lifter bore diameter) – (Valve lifter outer diameter)
If it exceeds the standard value, refer to the outer diameter and bore diameter standard values and replace
valve lifter and/or cylinder head.Runout (Total indicator reading):
: Less than 0.15 mm (0.0059 in)
JEM164G
SEM160D
Standard : 29.960 - 29.975 mm (1.1795 - 1.1801 in) dia.
SEM961E
Standard : 30.000 - 30.021 mm (1.1811 - 1.1819 in) dia.
PBIC0367E
Standard : 0.025 - 0.061 mm (0.0010 - 0.0024 in)

CAMSHAFT
EM-153
[YD22DDTi]
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INSTALLATION
1. Install the valve lifter and adjusting shim.
lMake sure that these are installed in the same position as before the removal process.
2. Install the camshaft.
lIdentify camshafts by the paint position and screw hole at the
rear end.
lInstall so that knock pins are positioned in the directions
showninthefigure.
3. Install camshaft brackets.
lInstall correctly, identifying brackets by the journal No. and
front mark on top surface.
4. Tighten bolts in the order shown in the figure according to the
following procedure:
a. Tighten to 2.0 N·m (0.2 kg-m, 17 in-lb).
lMake sure camshaft thrusting parts (on rear side) securely fit
in their mating parts on the cylinder head.
b. Tighten to 6 N·m (0.6 kg-m, 52 in-lb).
c. Tighten to 12 to 13 N·m (1.2 to 1.4 kg-m, 9 to 10 ft-lb).
5. Install camshaft sprockets.
lCamshaft sprockets are commonly used for RH and LH.
lAlign camshaft sprocket and dowel pin on camshaft, and
install.
lHolding the hexagonal part of camshaft with a wrench, tighten bolt securing camshaft sprocket.
6. Before installing spill tube after installing secondary timing chain, check and adjust valve clearance. Refer
toEM-154, "
Va l v e C le a r a n c e".
7. Hereafter, install in the reverse order of removal.Camshaft RH : Paint is at position A without screw hole.
Camshaft LH : Paint is at position B with screw hole.
JEM173G
SEM516G
JEM175G
JEM160G

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
SBIA0180E

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-156
[YD22DDTi]
CAMSHAFT
5. With the valve spring in a compressed state, remove the cam-
shaft pliers by securely setting the outer circumference of the
valve lifter with the end of the lifter stopper.
lHold the lifter stopper by hand until the shim is removed.
CAUTION:
Do not retrieve the camshaft pliers forcefully, as the cam-
shaft will be damaged.
6. Move the rounded hole of the adjusting shim to the front with a
very thin screwdriver or like that.
lWhen the adjusting shim on the valve lifter will not rotate
smoothly, restart from step 4 to release the end of the lifter
stopper from touching the adjusting shim.
7. Remove the adjusting shim from the valve lifter by blowing air
through the rounded hole of the shim with an air gun.
CAUTION:
To prevent any remaining oil from being blown around,
thoroughly wipe the area clean and wear protective gog-
gles.
8. Remove the adjusting shim by using a magnetic hand.
9. Measure the thickness of the adjusting shim using a micrometer.
lMeasure near the center of the shim (the part that touches the
camshaft).
10. Select the new adjusting shim from the following methods.
SBIA0185E
SBIA0186E
SBIA0187E
Calculation method of the adjusting shim thickness:
R = Thickness of removed shim
N = Thickness of new shim
M = Measured valve clearance
Intake
N = R + [M - 0.28 mm (0.0010 in)]
Exhaust
N = R + [M - 0.30 mm (0.0118 in)]
FEM032

CAMSHAFT
EM-157
[YD22DDTi]
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lNew adjusting shims have the thickness stamped on the rear
side.
lShims are available in 33 size from 2.10 mm (0.0827 in) to
2.74 mm (0.1079 in), in steps of 0.02 mm (0.0008 in).
11. Fit the selected adjusting shim to the valve lifter.
CAUTION:
Place the stamped side of the adjusting shim to the valve
lifter.
12. Compress the valve spring using the camshaft pliers and
remove the lifter stopper.
13. Rotate the crankshaft 2 to 3 turns by hand.
14. Confirm that the valve clearance is within the specification.
Valve clearance:
*: Approximately 80°C (176°F)
15. Install remaining parts in reverse order of removal.
Stamped mark Shim thickness mm (in)
2.10
2.12
·
·
·
2.742.10 (0.0827)
2.12 (0.0835)
·
·
·
2.74 (0.1079)
JEM184G
SEM552G
Item Cold Hot* (Reference data)
Intake 0.24 -0.32 (0.0094 - 0.0126) 0.274 - 0.386 (0.0108 - 0.0152)
Exhaust 0.26 - 0.34 (0.0102 - 0.0134) 0.308 - 0.432 (0.0121 - 0.0170)

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

EM-160
[YD22DDTi]
SECONDARY TIMING CHAIN
7. Remove timing chain slack guide.
lUsing a hexagon-head wrench [face to face: 6 mm (0.24 in),
SST], remove bolt to remove timing chain slack guide.
8. Remove timing chain tension guide.
9. Remove secondary timing chain.
lTiming chain alone can be removed without removing sprock-
ets.
INSPECTION AFTER REMOVAL
Timing Chain
Check for cracks and excessive wear at roller links. Replace
chain if necessary.
SBIA0228E
JEM127G
SEM984C