NISSAN ALMERA N16 2003 Electronic Repair Manual

CAMSHAFT
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*: Approximately 20°C (68°F) (Reference data)
7. Turn crankshaft pulley a full turn to position No. 4 cylinder at TDC of its compression stroke.
8. Referring to figure, measure valve clearance of parts with × in
table below.
9. If outside the standard, adjust applicable valves as shown
below.
ADJUSTMENT (SHIMLESS TYPE)
●Perform adjustment depending on selected head thickness of valve lifter.
●The 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 to EM-32, "
Removal and Installation" .
2. Remove the valve lifters at the locations that are outside the standard.
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.
●Valve 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:Valve clearance standard:
Hot Intake : 0.304 - 0.416 mm (0.012 - 0.016 in)
Exhaust : 0.348 - 0.472 mm (0.014 - 0.019 in)
Cold* Intake : 0.25 - 0.33 mm (0.010 - 0.013 in)
Exhaust : 0.32 - 0.40 mm (0.013 - 0.016 in)
If an adjustment is done with cold engine, confirm reference values with hot engine are met.
Limit values with hot engine (reference) Intake : 0.21 - 0.47 mm (0.008 - 0.019 in)
Exhaust : 0.30 - 0.56 mm (0.012 - 0.022 in)
Cylinder No.1 No.2 No.3 No.4
Valve INT EXH INT EXH INT EXH INT EXH
No. 4 cylinder at TDC of
its compression stroke×× × ×
MBIB0225E
KBIA0057E
Intake : 0.36 mm (0.014 in)
Exhaust : 0.37 mm (0.015 in)

EM-44
[QG]
CAMSHAFT
●Thickness of a new valve lifter can be identified by stamp
marks on the reverse side (inside the cylinder).
Stamp mark 696 indicates 6.96 mm (0.2740 in) 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)
ADJUSTMENT (SHIM TYPE)
●Remove adjusting shim for valves with incorrect valve clearance by following the procedure below:
1. Using a rag, completely wipe off engine oil from surroundings of adjusting shim.
2. When removing adjusting shim from a cam, turn crankshaft
clockwise (viewed from front) to make cam nose face straight
up.
3. Turn valve lifter and adjusting shim to removal direction.
●Using a slotted screwdriver with extra-thin tip, turn valve lifter
cutout in direction shown by the arrow.
4. Using camshaft pliers (special service tool), pinch camshaft.
Turn tool up in direction shown by the arrow with camshaft being
a fulcrum. This will push down adjusting shim to allow valve
spring to be compressed.
CAUTION:
●Be careful not to damage camshaft and cylinder head.
●Be careful not to damage surroundings of valve lifter.
PBIC1077E
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)
MBIB0226E
KBIA1391J

CAMSHAFT
EM-45
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5. With valve spring compressed, securely place tip of lifter stopper
(special service tool) onto surroundings of valve spring. Then
remove camshaft pliers (special service tool).
CAUTION:
If camshaft pliers are suddenly turned back, lifter stopper
may contact and damage camshaft journals. Turn back
camshaft pliers carefully to remove.
6. Keep adjusting shim slightly up from valve lifter.
●Insert a slotted screwdriver with extra-thin tip into cutout on
valve lifter for this purpose.
7. Using a magnetic handle, remove adjusting shim.
8. Using a micrometer, measure thickness (t1) of removed adjust-
ing shim at camshaft contact face (around center).
9. Use following formula to select proper replacement adjusting shim.
●Formula to calculate adjusting shim thickness (unit: mm)
Thickness of replacement valve lifter = t1+ ( C1 - C2 )
t1 = Thickness of removed valve lifter
C1 = Measured valve clearance
C2=Standard valve clearance:
PBIC1013E
PBIC1014E
MBIB0229E
Hot engine:
Intake : 0.37 mm (0.015 in)
Exhaust : 0.40 mm (0.016 in)
Reference values with cold engine:
Intake : 0.30 mm (0.012 in)
Exhaust : 0.35 mm (0.014 in)

EM-46
[QG]
CAMSHAFT
●Thickness of new adjusting shim is indicated with stamped
mark on its back.
10. Install selected adjusting shim to valve lifter.
CAUTION:
Install shim with its stamp mark facing the valve lifter.
11. Using camshaft pliers (special service tool), compress valve spring to remove lifter stopper (special ser-
vice tool).
12. Turn crankshaft a couple of times by hand.
13. Check that valve clearance is within standards.
Stamped mark Thickness of shim
200
202
:
:
2982.00 mm (0.0787 in)
2.02 mm (0.0795 in)
:
:
2.98 mm (0.1173 in)
Setting of adjusting shim thickness (at factory)
: Thickness 2.00 to 2.98 mm (0.0787 - 0.1173 in) [spacing of 0.02 mm (0.0008 in)] 50 types
MBIB0230E

TIMING CHAIN
EM-47
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TIMING CHAINPFP:13028
Removal and InstallationEBS00LQD
CAUTION:
Apply new engine oil to parts marked in illustration before installation.
REMOVAL
1. Place vehicle on lift.
PBIC0971E
1. Cylinder head front cover 2. Camshaft sprocket (INT) 3. Washer
4. Camshaft sprocket (EXH) 5. Chain tensioner 6. Chain slack guide
7. O-ring 8. Power steering pump adjusting bar 9. Crankshaft pulley
10. Front oil seal 11. Front cover 12. Chain tension guide
13. Dowel pin 14. Timing chain 15. Oil pump drive spacer
16. Crankshaft sprocket 17. O-ring (with collar) 18. Auxiliary bolt of cylinder head

EM-48
[QG]
TIMING CHAIN
2. Disconnect battery ground cable.
3. Remove undercover, front RH wheel and RH splash cover.
4. Drain engine coolant from radiator and cylinder block. Refer to LC-17, "Changing Engine Coolant".
5. Drain engine oil from oil pan.
6. Remove drive belt. Refer to EM-13, "
Removal and Installation" .
7. Remove power steering pump from adjusting bar.
8. Remove alternator. SC-33, "Removal and Installation".
9. Remove ignition coils. Refer to EM-24, "
IGNITION COIL" .
10. Remove rocker cover. Refer to EM-29, "
Removal and Installation" .
11. Remove oil level gauge.
12. Remove exhaust front tube. Refer to FE-10, "Removal and Installation".
13. Remove center member.
14. Remove gusset.
15. Remove rear plate (lower) (A/T models).
16. Remove oil pan and oil strainer. Refer to EM-22, "
Removal and Installation" .
17. For safe operation, and to reduce load to mount insulator, install removed center member again.
18. Remove engine front-side (right side of vehicle) engine mount. Refer to EM-67, "
ENGINE ASSEMBLY" .
a. Remove any parts that cause difficulties for operation around mount, or perform transfer.
b. Support cylinder block bottom surface with a transmission jack.
CAUTION:
●When applying jack, use a wooden block to avoid damage to oil pan mounting surface.
●While performing following operations, support engine front-side with jack.
c. Separate engine mounting insulator and bracket.
d. Remove engine mounting bracket.
19. Remove cylinder head front cover.
●Move harness which was previously fixed on front surface.
20. Remove auxiliary bolts of cylinder head.
21. Set the No. 1 cylinder to the compression TDC.
a. Turn the crankshaft pulley clockwise, and align the timing indica-
tor of the gear case to the timing mark of the crankshaft pulley.
PBIC0557E
PBIC0750E

TIMING CHAIN
EM-49
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b. Make sure that the camshaft sprocket mating mark is in the
position shown in the figure.
●If the mating mark is not in position, turn the crankshaft pulley
once more and position it.
22. Remove crankshaft pulley with the following procedure:
a. Secure crankshaft counter weight with handle of a hammer, and
loosen crankshaft pulley bolts.
CAUTION:
Take care to prevent foreign material from entering the
engine.
b. Remove crankshaft pulley using crankshaft pulley puller (com-
mercial service tool).
CAUTION:
●Hook tab onto back of crankshaft pulley only.
●Do not remove crankshaft pulley bolt. Fully loosen, and
then use it as support point.
NOTE:
If oil pan is not removed, remove crankshaft pulley as follows.
i. Remove rear plate (lower).
ii. Engage drive plate ring gear with a flat-head screwdriver to fix
crankshaft in position, and loosen crankshaft pulley bolt.
iii. Remove crankshaft pulley using crankshaft pulley puller (com-
mercial service tool).
23. Remove water pump pulley and idler pulley bracket assembly.
MBIB0194E
PBIC0565E
KBIA1437E
KBIA1438E

EM-50
[QG]
TIMING CHAIN
24. Remove front cover with the following procedure:
a. To increase freedom of front cover posture during removal/
installation, pull oil pump drive spacer out through front oil seal.
●Pull it straight out using long-nose priers or two flat-bladed
screwdrivers.
CAUTION:
Be careful not to damage side of oil pump drive spacer and
front oil seal lip.
b. Remove power steering pump adjusting bar.
c. Remove front cover carefully.
●Remove mounting bolts A - E shown in figure.
NOTE:
Bolts C and E have been removed in step b.
CAUTION:
●When removing, be careful not to damage or bend front
end of cylinder head gasket. Also after peeling off con-
tact face between front cover and gasket, their surfaces
shall be smooth.
●If cylinder head gasket is damaged, replace it with new
one.
d. Remove O-rings from front cover and cylinder block.
25. Pull two dowel pins for front cover out of cylinder block.
●Heat them with industrial dryer sufficiently, then pull them out
using locking pliers.
NOTE:
This operation is performed as preparation operation for front
cover installation. This operation can be performed after
removal of timing chain.
26. If front oil seal is need to be replaced, remove it from front cover.
●Insert a flat-bladed screwdriver in notch on oil seal mounting
point, and lift oil seal to remove.
NOTE:
Remove timing chain and its related parts with the following pro-
cedure:
27. Secure intake camshaft sprocket in most advanced position. Refer to EM-32, "
REMOVAL" .
NOTE:
Removal of timing chain and related parts is described in following steps.
28. Remove chain tensioner. Refer to EM-32, "
REMOVAL" .
29. Remove camshaft sprocket. Refer to EM-32, "
REMOVAL" .
CAUTION:
After this step is completed, do not rotate crankshaft and camshaft separately in order to prevent
interference between valve and piston.
PBIC0566E
EMD0850D
PBIC0567E
PBIC0558E

TIMING CHAIN
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30. Remove timing chain, timing chain slack guide and tension guide.
31. Remove crankshaft sprocket.
INSPECTION AFTER REMOVAL
Timing Chain
Check timing chain for cracks or serious wear. If a malfunction is
detected, replace it.
INSTALLATION
CAUTION:
●Use a scraper to completely remove all liquid gasket adhering to mounting surface. De-grease and
clean with white gasoline.
●After installation, wipe off any protruding liquid gasket.
1. Install timing chain and its related parts with the following procedure:
●For aligning positions for each sprocket and timing chain, and
installed condition of their related parts, refer to figure.
●Install each sprocket with its mating mark facing engine front
side.
a. Install timing chain and crankshaft sprocket.
●Make sure that crankshaft key points straight up (No.1 cylin-
der is at TDC).
●Hook timing chain on front end of camshaft so that it will not
fall off.
b. Install timing chain slack guide and tension guide.
c. Install camshaft sprocket. Refer to EM-35, "
INSTALLATION" .
d. Install chain tensioner. Refer to EM-35, "
INSTALLATION" .
e. Make sure again that mating marks are properly aligned.
f. Temporarily install oil pump drive spacer, crankshaft pulley, and crankshaft pulley mounting bolt so that
crankshaft can be rotated.
g. Rotate crankshaft clockwise several times to make sure it rotates normally. Refer to EM-35, "
INSTALLA-
TION" .
h. Rotate crankshaft clockwise several times, and check that there is no unusual condition.
i. Remove parts temporarily installed in step f.
PBIC0282E
KBIA1398E

EM-52
[QG]
TIMING CHAIN
2. Install front oil seal to front cover.
●Install it so that identification letters on oil seal will face toward
front side of the engine.
●Using an oil seal drift (commercial service tool), press oil seal
in until it is flush with end surface of mounting position.
●Make sure that oil seal outer circumference is free from dam-
age and burr.
3. Install front cover with the following procedure:
a. Install O-ring to cylinder block.
b. Using a flat-bladed screwdriver, apply a continuous bead of liq-
uid gasket to contact surface between cylinder head gasket
lower surface and cylinder block (2 locations shown in figure).
Use Genuine Liquid Gasket or equivalent.
c. Apply a continuous bead of liquid gasket to back surface of front
cover (location shown in figure).
CAUTION:
●Do not apply liquid gasket to groove A shown in figure.
●Especially for locations indicated by * mark in figure,
strictly observe application range of liquid gasket.
d. Apply liquid gasket to top surface of front cover lightly and
evenly.
Use Genuine Liquid Gasket or equivalent.
e. Install O-ring to back surface of front cover.
f. With socket of oil pump inner rotor placed on crankshaft top sur-
face (clearance between front cover top surface and cylinder
head gasket lower surface is secured), move front cover close to
cylinder block. (Right side in figure)
g. Lift front cover at an angle and install it to mounting position so
that front cover will come in contact with both cylinder head gas-
ket lower surface and cylinder block front surface at the same
time. (Right side in figure)
CAUTION:
●During work, be sure not to damage cylinder head gas-
ket.
●When installing, avoid discontinuous bead of liquid gas-
ket caused by allowing it to adhere to an unnecessary area.
PBIC0530E
PBIC0561E
PBIC0562E
PBIC0563E