2003 NISSAN ALMERA N16 Ignition coil

EM-1
ENGINE MECHANICAL
B ENGINE
CONTENTS
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SECTION
A
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ENGINE MECHANICAL
QG
PRECAUTIONS .......................................................... 3
Precautions for Drain Coolant .................................. 3
Precautions for Disconnecting Fuel Piping .............. 3
Precautions for Removal and Disassembly ............. 3
Precautions for Inspection, Repair and Replace-
ment ......................................................................... 3
Precautions for Assembly and Installation ............... 3
Parts Requiring Angular Tightening ......................... 3
Precautions for Liquid Gasket .................................. 4
REMOVAL OF LIQUID GASKET SEALING .......... 4
LIQUID GASKET APPLICATION PROCEDURE ..... 4
PREPARATION ........................................................... 5
Special Service Tools ............................................... 5
Commercial Service Tools ........................................ 7
NOISE, VIBRATION, AND HARSHNESS (NVH)
TROUBLESHOOTING ................................................ 9
NVH Troubleshooting —Engine Noise ..................... 9
Use the Chart Below to Help You Find the Cause
of the Symptom. ..................................................... 10
DRIVE BELTS ............................................................11
Checking Drive Belts ............................................... 11
Tension Adjustment ................................................ 12
POWER STEERING PUMP AND WATER PUMP
BELT ................................................................... 12
ALTERNATOR AND AIR CONDITIONER COM-
PRESSOR BELT ................................................. 12
Removal and Installation ........................................ 13
REMOVAL ........................................................... 13
INSTALLATION ................................................... 13
AIR CLEANER AND AIR DUCT ............................... 14
Removal and Installation ........................................ 14
REMOVAL ........................................................... 14
INSTALLATION ................................................... 14
Changing Air Cleaner Element ............................... 15
INTAKE MANIFOLD ................................................. 16
Removal and Installation ........................................ 16
REMOVAL ........................................................... 16
INSPECTION AFTER REMOVAL ....................... 18
INSTALLATION ................................................... 18EXHAUST MANIFOLD AND CATALYTIC CON-
VERTER .................................................................... 19
Removal and Installation ........................................ 19
REMOVAL ........................................................... 19
INSPECTION AFTER REMOVAL ....................... 20
INSTALLATION ................................................... 20
Disassembly and Assembly .................................... 21
DISASSEMBLY ................................................... 21
ASSEMBLY ......................................................... 21
OIL PAN AND OIL STRAINER ..............................
... 22
Removal and Installation ........................................ 22
REMOVAL ........................................................... 22
INSTALLATION ................................................... 23
INSPECTION AFTER INSTALLATION ................ 23
IGNITION COIL ......................................................... 24
Removal and Installation ........................................ 24
REMOVAL ........................................................... 24
INSTALLATION ................................................... 24
SPARK PLUG (CONVENTIONAL) ........................... 25
Removal and Installation ........................................ 25
REMOVAL ........................................................... 25
INSPECTION AFTER REMOVAL ....................... 25
INSTALLATION ................................................... 25
FUEL INJECTOR AND FUEL TUBE ........................ 26
Removal and Installation ........................................ 26
REMOVAL ........................................................... 26
INSTALLATION ................................................... 27
INSPECTION AFTER INSTALLATION ................ 28
ROCKER COVER ..................................................... 29
Removal and Installation ........................................ 29
REMOVAL ........................................................... 29
INSTALLATION ................................................... 30
CAMSHAFT .............................................................. 32
Removal and Installation ........................................ 32
REMOVAL ........................................................... 32
INSTALLATION ................................................... 35

EM-24
[QG]
IGNITION COIL
IGNITION COIL
PFP:22448
Removal and InstallationEBS00LQ7
REMOVAL
1. Remove ignition coil harness connector from ignition coil.
2. Remove ignition coil.
CAUTION:
●Do not shock it.
●Do not disassemble it.
INSTALLATION
●Install in the reverse order of removal.
YEM050
1. Ignition coil 2. Spark plug 3. Rocker cover

SPARK PLUG (CONVENTIONAL)
EM-25
[QG]
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SPARK PLUG (CONVENTIONAL)PFP:22401
Removal and InstallationEBS00LQ8
REMOVAL
1. Disconnect ignition coil harness connector from ignition coil.
2. Remove ignition coil.
3. Remove spark plugs with a spark plug wrench (commercial ser-
vice tool).
Spark plug
INSPECTION AFTER REMOVAL
Check spark plug gap. Adjust or replace if necessary.
●Use a wire brush for cleaning, if necessary.
INSTALLATION
Install in the reverse order of removal, paying attention to the following.
Make NGK Champion
Standard type LFR5A-11 REC10YC4
Hot type LFR4A-11 —
Cold type LFR6A-11 —
SMA581C
Standard : 1.0 - 1.1 mm (0.039 - 0.043 in)
SMA476
Spark plug:
: 19.6 - 29.4 N·m (2.0 - 3.0 kg-m, 15 - 21 ft-lb)

ROCKER COVER
EM-29
[QG]
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ROCKER COVERPFP:13264
Removal and InstallationEBS00LQA
CAUTION:
Apply new engine oil when installing the parts that specified to do so in the figure.
REMOVAL
1. Move harnesses on top surface and right side of rocker cover, and move them aside.
2. Remove ignition coil. Refer to EM-24, "
Removal and Installation" .
3. Disconnect PCV hoses on rocker cover side.
4. If necessary, remove PCV control valve.
5. If necessary, remove intake valve timing control solenoid valve and camshaft position sensor (PHASE).
CAUTION:
●Do not shock it.
●Do not disassemble it.
●Tip of camshaft position sensor (PHASE) generates strong magnetic fields. Keep it away from
metal particles or objects affected by magnetic fields.
KBIA1375E
1. PCV hose 2. Rocker cover 3. Grommet
4. PCV control valve 5. PCV hose 6.Intake valve timing control solenoid
valve
7. O-ring 8. Oil filter cap 9. Gasket
10. Gasket 11. Rocker cover oil seal 12. Gasket
13. O-ring 14. Camshaft position sensor (PHASE)

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
[QG]
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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

EM-58
[QG]
CYLINDER HEAD
8. Install spark plug, ignition coil and harness connectors.
Removal and InstallationEBS00LQI
REMOVAL
1. Release fuel pressure. Refer to EC-34, "FUEL PRESSURE RELEASE" (WITH EURO-OBD), EC-427,
"FUEL PRESSURE RELEASE" (WITHOUT EURO-OBD).
2. Remove undercover.
3. Drain engine coolant. Refer to LC-17, "Changing Engine Coolant".
4. Remove the following components and related parts:
●Intake manifold and intake manifold collector. Refer to EM-16, "INTAKE MANIFOLD" .
●Exhaust manifold and catalytic converter. Refer to EM-19, "EXHAUST MANIFOLD AND CATALYTIC
CONVERTER" .
●Ignition coil. Refer to EM-24, "IGNITION COIL" .
●Rocker cover. Refer to EM-29, "ROCKER COVER" .
●Camshaft. Refer to EM-32, "CAMSHAFT" .
●Alternator bracket. Refer to SC-33, "Removal and Installation".
PBIC0972E
1. Rear engine slinger 2. Cylinder head bolt 3. Washer
4. Auxiliary bolt of cylinder head 5. Cylinder head gasket 6. Cylinder head assembly

EM-72
[QG]
CYLINDER BLOCK
●A commercial engine stand can be used.
NOTE:
●This example is an engine stand for holding at transaxle
mounting side with the flywheel or drive plate removed.
3. Drain engine oil and coolant from inside of engine.
4. Remove the following components and associated parts.
●Fuel tube and injector assembly; Refer to EM-26, "Removal and Installation" .
●Intake manifold and intake manifold collector assembly; Refer to EM-16, "Removal and Installation" .
●Ignition coil; Refer to EM-24, "Removal and Installation" .
●Rocker cover; Refer to EM-29, "Removal and Installation" .
●Oil pan and oil strainer; Refer to EM-22, "Removal and Installation" .
●Front cover and timing chain; Refer to EM-47, "Removal and Installation" .
●Camshaft; Refer to EM-32, "Removal and Installation" .
●Cylinder head assembly; Refer to EM-58, "Removal and Installation" .
●Auxiliary brackets and oil filter
5. Remove knock sensor.
CAUTION:
Avoid impacts such as a dropping.
6. Remove crankshaft position sensor (POS).
CAUTION:
●Avoid impacts such as a dropping.
●Do not disassemble.
●Keep it away from metal particles.
●Do not place sensor close to magnetic materials.
7. Remove flywheel (M/T models) or drive plate (A/T models). Fix
crankshaft with a ring gear stopper (special service tool), and
remove mounting bolts.
8. Remove rear plate.
9. Remove rear oil seal retainer.
●Insert a flat-bladed screwdriver between main bearing cap
and rear oil seal retainer to remove retainer.
10. Remove rear oil seal from rear oil seal retainer.
●Punch out with a flat-bladed screwdriver.
CAUTION:
●Be careful not to damage rear oil seal retainer.
PBIC0085E
PBIC0586E
SEM880F