2003 NISSAN ALMERA N16 Compression

Do not attempt to top off the fuel tank after the fuel pump nozzle
shuts off automatically. Continued refueling may cause fuel
overflow, resulting in fuel spray and possibly a fire.
WARNING:
To prevent ECM from storing the diagnostic trouble codes, do
not carelessly disconnect the harness connectors which are
related to the engine control system and TCM (Transmission
Control Module) system. The connectors should be discon-
nected only when working according to the WORK FLOW of
TROUBLE DIAGNOSES in EC and AT sections.
SGI787
PRECAUTIONS FOR MULTIPORT FUEL INJECTION
SYSTEM OR ENGINE CONTROL SYSTEM
NJGI0001S04Before connecting or disconnecting any harness connector for
the multiport fuel injection system or ECM:
Turn ignition switch to “OFF” position.
Disconnect negative battery terminal.
Otherwise, there may be damage to ECM.
Before disconnecting pressurized fuel line from fuel pump to
injectors, be sure to release fuel pressure.
Be careful not to jar components such as ECM and mass air
flow sensor.
PRECAUTIONS FOR THREE WAY CATALYSTNJGI0001S05If a large amount of unburned fuel flows into the catalyst, the cata-
lyst temperature will be excessively high. To prevent this, follow the
instructions below:
Use unleaded gasoline only. Leaded gasoline will seriously
damage the three way catalyst.
When checking for ignition spark or measuring engine
compression, make tests quickly and only when necessary.
Do not run engine when the fuel tank level is low, otherwise the
engine may misfire, causing damage to the catalyst.
Do not place the vehicle on flammable material. Keep flammable
material off the exhaust pipe and the three way catalyst.
SMA019D
PRECAUTIONS FOR HOSESNJGI0001S06Hose Removal and InstallationNJGI0001S0601To prevent damage to rubber hose, do not pry off rubber hose
with tapered tool or screwdriver.
PRECAUTIONS
Precautions (Cont’d)
GI-6

EM-32
[QG]
CAMSHAFT
CAMSHAFT
PFP:13001
Removal and InstallationEBS00LQB
CAUTION:
Prior to installation, apply engine oil to the parts marked in the figure.
REMOVAL
1. Remove rocker cover. Refer to EM-29, "ROCKER COVER" .
2. Remove cylinder head front cover.
●Move harness secured to front surface beforehand.
3. Set No. 1 cylinder at TDC of its compression stroke.
a. Remove RH splash cover (integrated with undercover).
b. Rotate crankshaft pulley clockwise and align yellow paint mark
with timing indicator.
PBIC0965E
1. Camshaft bracket 2. Camshaft sprocket (INT) 3. Camshaft sprocket (EXH)
4. Washer 5. Cylinder head front cover 6. Chain tensioner
7. Valve lifter 8. Adjusting shim (If so equipped) 9. Camshaft (EXH)
10. Camshaft (INT)
MBIB0193E

CAMSHAFT
EM-33
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c. Confirm mating marks stamped on intake and exhaust sprockets
are located as shown.
●If not, rotate crankshaft pulley as shown and align them.
d. Referring to mating marks on intake and exhaust camshaft
sprockets, put paint mating marks on timing chain links.
4. Set intake camshaft sprocket to most advanced position.
CAUTION:
Removal/installation of intake camshaft sprocket is required to maintain most advanced position
because of following reasons. Therefore, follow procedure exactly.
●Sprocket and vane (camshaft in front) rotate and become
offset within specific angle range.
●When engine is stationary, vane is located at most
retarded position. Vane is fixed to sprocket by internal
lock pin. Therefore, it does not rotate.
●If camshaft sprocket mounting bolts are turned under
above circumstance, lock pin will be damaged by lateral
load (shear stress). It may cause non-standard operation.
●Set intake camshaft sprocket to most advanced position as
follows.
NOTE:
“Rotating direction” means direction viewed from engine front side.
CAUTION:
Do not remove chain tensioner before performing this step.
a. Using a wrench, hold hexagonal part so that intake camshaft
does not move.
b. Using an air gun, apply air pressure to intake valve timing con-
trol solenoid valve advanced side oil passage on top surface of
No. 1 camshaft bracket.
●Keep applying air pressure until step “d” is completed.
CAUTION:
●Be careful not to damage oil passage from interference of
air gun tip.
●Thoroughly wipe off oil before applying air pressure.
When applying air pressure, cover around air gun using a rag. Wear protective glasses if neces-
sary.
MBIB0194E
MBIB0195E
MBIB0196E
Compression pressure
: 300 kPa (3.00 bar, 3.06 kg/cm
2 , 43.5 psi) or more
MBIB0197E

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
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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-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

CYLINDER HEAD
EM-57
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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

SERVICE DATA AND SPECIFICATIONS (SDS)
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SERVICE DATA AND SPECIFICATIONS (SDS)PFP:00030
Standard and LimitEBS00LQP
GENERAL SPECIFICATIONS
INTAKE MANIFOLD AND EXHAUST MANIFOLD
Unit: mm (in)
DRIVE BELTS
Unit: mm (in) EngineQG15DE QG18DE
ClassificationGasoline
Cylinder arrangement4, in-line
Displacement
cm
3 (cu in)1,497 (91.35) 1,769 (107.94)
Bore and stroke mm (in)73.6 x 88.0
(2.898 x 3.465)80.0 x 88.0
(3.150 x 3.465)
Valve arrangementDOHC
Firing order1-3-4-2
Number of piston ringsCompression 2
Oil 1
Number of main bearings5
Compression ratio9.9 9.5
Compression pressure
kPa (bar, kg/cm
2 , psi) / 350 rpmStandard1,372 (13.72, 13.99,
198.9)1,324 (13.24, 135,
192)
Minimum1,176 (11.76, 12.0,
170.5)1,128 (11.28, 11.5,
164)
Differential limit between cylinders 98 (0.98, 1.0, 14)
Valve timing
(Intake valve timing control - OFF)
Unit: degree
abcde f
208 228−856−230
PBIC0187E
Limit
Surface distortionIntake manifold 0.1 (0.004)
Exhaust manifold 0.3 (0.012)
Deflection adjustment
Used belt
New belt
Limit After adjustment
AlternatorWithout air conditioner compressor 10.2 (0.402)6.5 - 7.0
(0.256 - 0.276)5.5 - 6.1
(0.217 - 0.240)
With air conditioner compressor 8.1 (0.319)5.3 - 5.7
(0.209 - 0.224)4.5 - 5.0
(0.177 - 0.197)