2003 NISSAN ALMERA N16 Pulley

EM-42
[QG]
CAMSHAFT
Valve Lifter Hole Diameter
●Using inside micrometer, measure diameter of valve lifter hole of
cylinder head.
Calculation of Valve Lifter Clearance
(Valve lifter clearance) = (hole diameter of valve lifter) – (outer diam-
eter of valve lifter).
●When out of specified range, referring to each specification of outer and inner diameter, replace either or
both valve lifter and cylinder head.
Valve ClearanceEBS00LQC
INSPECTION
●The following procedure is applicable when: Components related to camshafts or valves are removed,
installed, or replaced. Drivability concerns (poor starting, poor idling, noise) are caused by valve clearance
aging.
1. Warm up engine, and stop.
2. Remove RH splash cover (integrated with undercover).
3. Remove rocker cover. Refer to EM-29, "
ROCKER COVER" .
4. Turn crankshaft pulley clockwise (viewed from front) to align yel-
low paint with timing indicator.
5. At this point, confirm that both intake and exhaust cam noses on
No. 1 cylinder face outward. (No. 1 cylinder is at TDC of its com-
pression stroke.)
●If not, turn crankshaft pulley more.
NOTE:
Or, valves to be checked when No. 4 cylinder is at TDC of its
compression stroke can be checked first following step 8.
6. Referring to figure, measure valve clearances of valves with × in
table below using a thickness gauge.Standard (Intake and exhaust)
: 30.000 - 30.021 mm (1.1811 - 1.1819 in) dia.
Standard (Intake and exhaust)
: 0.025 - 0.061 mm (0.0010 - 0.0024 in)
SEM867E
MBIB0222E
Cylinder No.1 No.2 No.3 No.4
Valve INT EXH INT EXH INT EXH INT EXH
No. 1 cylinder at
TDC of its compres-
sion stroke××× ×
MBIB0223E
MBIB0224E

CAMSHAFT
EM-43
[QG]
C
D
E
F
G
H
I
J
K
L
MA
EM
*: 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

TIMING CHAIN
EM-47
[QG]
C
D
E
F
G
H
I
J
K
L
MA
EM
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
[QG]
C
D
E
F
G
H
I
J
K
L
MA
EM
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

TIMING CHAIN
EM-51
[QG]
C
D
E
F
G
H
I
J
K
L
MA
EM
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

TIMING CHAIN
EM-53
[QG]
C
D
E
F
G
H
I
J
K
L
MA
EM
h. Install front cover with mounting bolts temporarily so that front
cover will not move.
i. Press fit dowel pin into cylinder block through front cover.
j. Tighten front cover mounting bolts temporarily.
●A [M6 x 20 mm (0.79 in)], B [M6 x 40 mm (1.57 in)], C [M8 x
70 mm (2.76 in)], D [M6 x 73 mm (2.87 in)]
●Bolt C also secures power steering pump adjusting bar.
●Bolt E [M6 x 12 mm (0.47 in)] is for installing power steering
pump adjusting bar.
k. Tighten cylinder head auxiliary bolts (M6) temporarily.
l. Tighten front cover mounting bolts and cylinder head auxiliary
bolts to specified torque.
4. Install oil pump drive spacer.
●When installing, align with flat of oil pump inner rotor.
●If they are not aligned, rotate inner rotor with a flat-bladed
screwdriver to align them.
CAUTION:
Be careful not to damage oil seal lips.
5. Install water pump pulley and idler pulley bracket assembly.
6. Install crankshaft pulley.
●When installing it, make sure that front oil seal lip is not inverted and garter spring is in position.
●For direction of mounting bolt washer, refer to “Component Parts Location”.
●With same procedure as “removal”, secure crankshaft, and tighten mounting bolts.
7. Install cylinder head front cover.
●Apply liquid gasket to cylinder head front cover.
●Use Genuine Liquid Gasket or equivalent.
8. Install engine front mounting bracket.
9. Install remaining parts in the reverse order of removal.
INSPECTION AFTER INSTALLATION
●In order to allow liquid gasket to be cured, perform inspection at least 30 minutes after the last step in
which parts sealed with liquid gasket are installed.
●With engine warmed up, check each part for engine oil leakage.
PBIC0564E
EMD0850D
PBIC0566E
PBIC0968E