2003 NISSAN ALMERA N16 meter

CAMSHAFT
EM-39
[QG]
C
D
E
F
G
H
I
J
K
L
MA
EM
INSPECTION AFTER REMOVAL
Camshaft Runout
●Place a V-block on a surface plate to support No. 2 and No. 5
journals on camshaft.
CAUTION:
Do not support No. 1 journal (camshaft sprocket mounting
side), because its diameter is different from that of the other
4 journals.
●Set a dial gauge vertically onto journal No. 3.
●Rotate the camshaft in one direction by hand and read indication
on the gauge.
●A half of reading value is actual bend.
Camshaft Cam Height
●Measure with a micrometer.
Camshaft Journal Clearance
Outer Diameter of Camshaft Journal
●Measure with a micrometer.
Inner Diameter of Camshaft Bracket
●Tighten camshaft bracket bolts to the specified torque.
●Using an inside micrometer, measure inner diameter of the cam-
shaft bracket.
Calculation of Camshaft Journal Clearance
(Oil clearance) = (Camshaft bracket inner diameter) - (Camshaft journal outer diameter) Standard : 0.02 mm (0.0008 in) or less
MBIB0215E
Intake : 40.217 - 40.407 mm (1.5833 - 1.5908 in)
Exhaust : 38.965 - 39.155 mm (1.5341 - 1.5415 in)
MBIB0216E
Standard
No. 1
: 27.935 - 27.955 mm (1.0998 - 1.1006 in) dia.
No. 2 to No. 5
: 23.935 - 23.955 mm (0.9423 - 0.9431 in) dia.
MBIB0217E
Standard
No. 1
: 28.000 - 28.021 mm (1.1024 - 1.1032 in) dia.
No. 2 to No. 5
: 23.985 - 24.006 mm (0.9443 - 0.9451 in) dia.
MBIB0218E

EM-40
[QG]
CAMSHAFT
●If outside the standard, refer to standard of each unit part and replace camshaft or cylinder head as appro-
priate.
NOTE:
Camshaft bracket is machined with cylinder head. Replace them as cylinder head assembly.
Camshaft End play
●Position a dial gauge onto front end of camshaft in thrust direc-
tion. Read indication of dial gauge while moving camshaft back
and forth (axial direction).
●If outside the standard, replace camshaft with new one. Then
measure it again.
●If still outside the standard, replace cylinder head with new one.
Camshaft Sprocket Runout
●Using a dial gauge, measure camshaft sprocket runout.
Valve Lifter and Adjusting Shim (Shim type)
Check surfaces of valve lifter and shim for cracks and wear.
Valve Lifter Clearance
Outer Diameter of Valve LifterStandard
No. 1
: 0.045 - 0.086 mm (0.0018 - 0.0028 in)
No. 2 to No. 5
: 0.030 - 0.071 mm (0.0012 - 0.0028 in)
Standard
Intake : 0.070 - 0.143 mm (0.0028 - 0.0056 in)
Exhaust : 0.115 - 0.188 mm (0.0045 - 0.0074 in)
MBIB0219E
Limit:
Intake : 0.2 mm (0.008 in)
Exhaust : 0.15 mm (0.0059 in)
PBIC0930E
SEM160D

CAMSHAFT
EM-41
[QG]
C
D
E
F
G
H
I
J
K
L
MA
EM
●Measure outer diameter with a micrometer.
Valve Lifter Hole Diameter
●Using an inside micrometer, measure valve lifter hole diameter
on cylinder head.
Calculation of Valve Lifter Clearance
(Clearance) = (Valve lifter hole inner diameter) - (Valve lifter outer diameter)
●If outside the standard, refer to standard of each OD and hole ID and then replace valve lifter or cylinder
head as appropriate.
Valve Lifter (Shimless type)
●Check if surface of valve lifter has any wear or cracks.
Valve Lifter Clearance
Outer Diameter of Valve Lifter
●Measure outer diameter of valve lifter.Standard : 29.960 - 29.975 mm (1.1795 - 1.1801 in) dia.
MBIB0220E
Standard : 30.000 - 30.021 mm (1.1811 - 1.1819 in) dia.
MBIB0221E
Standard : 0.025 - 0.061 mm (0.0010 - 0.0024 in)
KBIA0182E
Valve lifter outer diameter (Intake and exhaust)
: 29.960 - 29.975 mm (1.1795 - 1.1801 in) dia.
JEM798G

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)

CAMSHAFT
EM-45
[QG]
C
D
E
F
G
H
I
J
K
L
MA
EM
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)

OIL SEAL
EM-55
[QG]
C
D
E
F
G
H
I
J
K
L
MA
EM
Removal and Installation of Front Oil SealEBS00LQF
REMOVAL
1. Remove the following parts:
●Undercover (with splash cover)
●Drive belt; Refer to EM-11, "DRIVE BELTS" .
●Crankshaft pulley; Refer to EM-47, "TIMING CHAIN" .
2. Using flat-head screwdriver, remove front oil seal.
CAUTION:
Be careful not to damage front timing chain cover and crankshaft.
INSTALLATION
1. Apply engine oil on new front oil seal.
2. Using a suitable drift, press fit until the height of front oil seal is
level with the mounting surface.
●Suitable drift : outer diameter 50 mm (1.97 in), inner diameter
44 mm (1.73 in).
CAUTION:
●Be careful not to damage front cover and crankshaft.
●Press oil seal straight so that it is not curling up or
inclined.
3. Perform steps in the reverse order of removal for the following
operations.
Removal and Installation of Rear Oil SealEBS00LQG
REMOVAL
1. Remove transaxle assembly. Refer to MT-23, "Removal" (RS5F30A), MT-23, "Removal" (RS5F70A) and
AT-411, "Removal" (AUTOMATIC TRANSAXLE).
2. Remove drive plate. Refer to EM-70, "
CYLINDER BLOCK" .
3. Using flat-head screwdriver, remove front oil seal.
CAUTION:
Be careful not to damage mounting surface.
INSTALLATION
1. Using a suitable drift, press rear oil seal to rear oil seal retainer.
●Suitable drift : outer diameter 102 mm (4.02 in), inner diame-
ter 90 mm (3.54 in).
CAUTION:
●Do not touch grease applied on oil seal lip
●Be careful not to damage rear oil seal retainer and crank-
shaft.
●Press in straight to avoid causing any burrs or tilting of
oil seal.
SEM912F
SEM715A
SEM097F

CYLINDER HEAD
EM-57
[QG]
C
D
E
F
G
H
I
J
K
L
MA
EM
CYLINDER HEADPFP:11041
On-Vehicle ServiceEBS00LQH
CHECKING COMPRESSION PRESSURE
1. Warm up engine thoroughly. Then, stop it.
2. Release fuel pressure. Refer to EC-34, "
FUEL PRESSURE RELEASE" (WITH EURO-OBD), EC-427,
"FUEL PRESSURE RELEASE" (WITHOUT EURO-OBD).
3. Remove ignition coil and spark plug from each cylinder.
Refer to IGNITION COIL EM-24, "
Removal and Installation" and SPARK PLUG EM-25, "Removal and
Installation" .
4. Connect engine tachometer (not required in use of CONSULT-II).
5. Disconnect fuel injector harness connector so that no fuel is injected.
6. Install compression tester with adapter onto spark plug hole.
●Use compression gauge whose picking up end inserted to spark
plug hole is smaller than 20 mm (0.79 in) in diameter. Otherwise,
it may be caught by cylinder head during removal.
7. With accelerator pedal fully depressed, turn ignition switch to
“START” for cranking. When the gauge pointer stabilizes, read
the compression pressure and engine rpm. Perform these steps
to check each cylinder.
Compression pressure
[kPa (bar, kg/cm2 , psi)/rpm]
CAUTION:
Always use a fully changed battery to obtain specified engine speed.
●If the engine speed is out of specified range, check battery liquid for proper gravity. Check engine speed
again with normal battery gravity.
●If compression pressure is below minimum value, check valve clearances and parts associated with com-
bustion chamber (Valve, valve seat, piston, piston ring, cylinder bore, cylinder head, cylinder head gas-
ket). After the checking, measure compression pressure again.
●If some cylinders have low compression pressure, pour small amount of engine oil into the spark plug hole
of the cylinder to re-check it for compression.
–If the added engine oil improves the compression, the piston rings may be worn out or damaged. Check
the piston rings and replace if necessary.
–If the compression pressure remains at low level despite the addition of engine oil, the valves may be mal-
functioning. Check the valves for damage. Replace the valve or valve seat accordingly.
●If two adjacent cylinders have respectively low compression pressure and their compression remains low
even after the addition of engine oil, the gaskets are leaking. In such a case, replace the cylinder head
gaskets.
KBIA1402E
Engine type QG15DE QG18DE
Standard1,372 (13.72, 13.99,
198.9)1,324 (13.24, 13.5, 192)
Limit 1,176 (11.76, 12.0, 170.5) 1,128 (11.28, 11.5, 164)
Difference limit among
cylinders98 (0.98, 1.0, 14) 98 (0.98, 1.0, 14)SEM387C