Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Nissan Micra 2003-2006 Approved sma EM-CR-001
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CAMSHAFT
CAMSHAFT
Removal and Installation To ESM
PBIC1438E
1. Camshaft bracket (No. 2 - 5) 2. Camshaft bracket (No. 1) 3. Camshaft (intake)
4. Camshaft (exhaust) 5. Valve lifter 6. Camshaft sprocket (intake)
7. Camshaft sprocket (exhaust) 8. Chain tensioner 9. Cylinder head front cover
10. Timing chain 11. Cylinder head 12. O-ring
13. Camshaft position sensor (PHASE)
REMOVAL
1. Remove RH front fender protector.
2. Secure the engine position using one of the following methods. Remove RH engine mount stay and
engine mount bracket (upper). Refer to EM-69, "Removal and Installation" on ESM.
q Mount engine slingers and hook with hoist. Refer to EM-69, "Removal and Installation" on ESM.
q Support the oil pan bottom with a jack stand, etc.
3. Remove rocker cover. Refer to EM-33, "ROCKER COVER" on ESM.
4. Remove the camshaft position sensor (PHASE) from the back of the cylinder head if necessary.
CAUTION:
q Handle camshaft position sensor (PHASE) with care. Avoid impacts.
q The tip of the sensor is magnetic, so do not let metal dust get on it or place it next to objects
which can be affected by magnets.
5. Remove RH headlamp. Refer to LT-6, "HEADLAMP-CONVENTIONAL TYPE" on ESM.
6. Remove the cylinder head front cover.
7. Following the procedure below, place cylinder No. 1 at TDC of its compression stroke
EM-1
CAMSHAFT
a. Turn the crankshaft pulley clockwise as seen from the engine
front, and match up the crankshaft pulley TDC mating mark (no
color) (2) with the timing indicator (1) on the front cover.
PBIC1305E
b. Confirm mating marks (1) stamped on intake and exhaust
sprockets are located as shown.
q If there is no position mark at the position in the figure, turn
the crankshaft pulley once more to position them as in the fig-
ure.
c. Make sure mating marks on intake and exhaust camshaft
sprockets are located as shown in the figure, then paint mating
marks on the timing chain links.
PBIC1306E
8. Make sure the intake camshaft sprocket is in the most advanced position.
CAUTION:
Installation and removal of the intake camshaft sprocket must be done in the most advanced posi-
tion for the following reasons, so make sure you follow the procedure exactly.
q The sprocket (1) and vane (camshaft coupling) (3) are
designed to spin and move within the range of a certain
angle.
q With the engine stopped the vane (3) is in the most
retarded position. It will not spin because it is locked to
the sprocket side by the internal lock pin (2).
q If the camshaft sprocket mounting bolts are turned in the
situation described above (the most retarded position),
the lock pin (2) will become damaged and cause malfunc-
tions because of the increased horizontal load (cutting
force) on the lock pin (2). PBIC1439E
q Put the intake camshaft sprocket in the most advance position
in the following steps.
CAUTION:
The chain tensioner must not be removed before doing this step.
NOTE:
The spinning direction in the following description is as seen from the engine front.
a. Immobilize the hexagonal part of the camshaft with a wrench (1)
to prevent the intake camshaft from moving.
PBIC1308E
EM-2
CAMSHAFT
b. Apply air pressure with an air gun (2) to the advanced angle side
oil passage of the intake valve timing control on the top surface
of the No. 1 camshaft bracket (1).
Compression pressure
: 300 kPa (3.00 bar, 3 kg/cm2, 43.5 psi) or more
NOTE:
The air pressure is used to move the lock pin into the disengage
position.
q Keep applying air pressure until step "e" is completed.
PBIC1309E
CAUTION:
q Be sure not to damage the oil passage with the tip of the air gun.
q Wipe all the oil off on the top surface of the No. 1 camshaft bracket to prevent oil from being
blown with the air, and the area around the air gun should be covered with a rag when applying
air pressure. Eye protection should be worn as needed.
c. Turn the intake camshaft slowly counter-clockwise in direction A
(towards the intake manifold).
q Keep the air pressure on.
CAUTION:
Also be sure the wrench immobilizing the camshaft does
not come loose.
d. While doing the above, once you hear a click (the sound of the
internal lock pin disengaging) from inside the intake camshaft
sprocket, start turning the intake camshaft in the opposite direc-
tion, direction B (clockwise: towards the exhaust manifold) and
PBIC1440E
to the most advanced angle position.
q Keep the air pressure on.
q If there is no click, as soon as the vane (camshaft coupling) starts moving independently of the cam-
shaft sprocket, the lock pin has become disengaged.
q If the lock pin does not become disengaged, shake the wrench immobilizing the camshaft slightly.
q If this still does not help in disengaging the lock pin, tap the intake camshaft front very lightly with a plas-
tic hammer.
e. Once the vane starts to spin and then the camshaft sprocket starts to spin with the camshaft, it has
reached the most advanced position, so stop.
q Make sure the most advanced position locating intake valve
timing control advance mark (1) of vane (3) and alignment
mark (2) of sprocket (4) as shown in the figure.
PBIC1634E
EM-3
CAMSHAFT
9. Attach the stopper pin (1) such as a paper clip to secure the
plunger in the full compressed position and remove the chain
tensioner (2).
PBIC1312E
10. Keeping the wrench on the camshaft hexagonal part, loosen the
mounting bolts and remove the intake and exhaust camshaft
sprockets.
CAUTION:
q Make sure the tools do not come in contact with the A/C
piping.
q Do not loosen mounting bolts with securing anything
other than the camshaft hexagonal part or with tension-
ing the timing chain.
NOTE:
EMD0826D
With the front cover attached, the timing chain and crankshaft
sprocket will not come off, so there is no need to take steps to maintain the timing chain tension.
q The intake camshaft sprocket should be handled with the following precautions in mind.
CAUTION:
q When removing intake camshaft sprocket, using adhesive tape or equivalent, prevent vane from
rotating so that lock pin will not rejoin in the most retarded position.
q Handle it carefully, and avoid any chance of impact caused by dropping.
q Do not disassemble. (Do not loosen the four front bolts.)
NOTE:
While removing the intake camshaft sprocket, if the lock pin has been rejoined in the most retarded posi-
tion, do the following to restore it.
a. Reinstall the intake camshaft sprocket to the intake camshaft and tighten the mounting bolts enough to
prevent air leaking out when the air pressure is applied later.
CAUTION:
To prevent internal lock pin from damaging, keep the torque on the mounting bolts to the mini-
mum required to prevent air from escaping.
b. Apply the air pressure, disengage the lock pin following step 8, and turn the vane to the most advanced
position. (The timing chain need not be attached for this step.)
c. Remove the intake camshaft sprocket from camshaft.
11. Remove camshaft brackets.
q Loosen bolts in several steps in reverse order shown in the
figure.
12. Remove camshaft.
CAUTION:
Do not deform or damage intake camshaft rear end signal
plate.
13. Remove valve lifter.
q Identify installation position of each valve. Arrange removed
valve lifters so they cannot be mixed up. PBIC0969E
INSTALLATION
1. Install valve lifter.
EM-4
CAMSHAFT
q Install it in its original positions.
2. Install camshaft.
q You can distinguish between the intake and the exhaust by
looking at the different shapes of the front and rear ends of
the camshaft.
MBIB0204E
q Install the camshaft front ends dowel pin hole (1) and dowel
pin (2) so that they are positioned as shown in the figure.
PBIC1316E
3. Install camshaft brackets.
q Completely remove any foreign material on bottom surfaces
of camshaft brackets and top surface of cylinder head.
q Referring to the marks on top of the camshaft bracket, install
so that it is in the same position and facing the same direction
as when removed.
MBIB0206E
4. Tighten camshaft bracket bolts in the following order.
a. Bolt sizes vary with installation position. Refer to the following
when installing bolts.
Bolt color
1 - 10 : Black
11, 12 : Gold
b. First tighten bolts 9 through 12, then tighten bolts 1 through 8 in
numerical order.
PBIC0969E
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