NISSAN ALMERA N16 2003 Electronic Repair Manual

CYLINDER HEAD
EM-63
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VALVE GUIDE CLEARANCE
Perform this inspection before removing valve guide.
1. Make sure that the valve stem diameter is within the specification.
2. Push the valve out by approx. 15 mm (0.59 in) toward the combustion chamber side to measure the
valve's run-out volume (in the direction of dial gauge) with dial gauge.
3. The half of the run-out volume accounts for the valve guide clearance.
VALVE GUIDE REPLACEMENT
When valve guide is removed, replace with oversized [0.2 mm (0.008 in)] valve guide.
1. To remove valve guide, heat cylinder head to 110 to 130°C (230
to 266°F) by soaking in heated oil.
2. Drive out valve guide with a press [under a 20 kN (2 ton, 2.2 US
ton, 2.0 lmp ton) pressure] or hammer and suitable tool.
3. Ream cylinder head valve guide hole.Standard
Intake : 0.020 - 0.050 mm (0.0008 - 0.0020 in)
Exhaust : 0.040 - 0.070 mm (0.0016 - 0.0028 in)
PBIC0077E
SEM008A
SEM931C
Valve guide hole diameter (for service parts):
Intake and exhaust
: 9.685 - 9.696 mm (0.3813 - 0.3817 in) dia.
SEM932C

EM-64
[QG]
CYLINDER HEAD
4. Heat cylinder head to 110 to 130°C (230 to 266°F) by soaking in
heated oil.
5. Press valve guide from camshaft side to dimensions as in illus-
tration.
CAUTION:
Cylinder head contains heat. When working, wear protec-
tive equipment to avoid getting burned.
6. Using valve guide reamer, apply reamer finish to valve guide.
VALVE SEAT CONTACT
●After confirming that the dimensions of valve guides and valves
are within specifications, perform this procedure.
●Apply prussian blue (or white lead) onto contacting surface of
valve seat to check the condition of the valve contact on the sur-
face.
●Check if the contact area band is continuous all around the cir-
cumference.
●If not, grind to adjust valve fitting and check again. If the contact-
ing surface still has N.G conditions even after the re-check,
replace valve seat.
VALVE SEAT REPLACEMENT
When valve seat is removed, replace with oversized [0.5 mm (0.020 in)] valve seat.
1. Bore out old seat until it collapses. Boring should not continue beyond the bottom face of the seat recess
in cylinder head. Set the machine depth stop to ensure this.
SEM008A
PBIC0577E
Standard
Intake and exhaust
: 5.500 - 5.515 mm (0.2165 - 0.2171 in) dia.
SEM932C
EMA0487D

CYLINDER HEAD
EM-65
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2. Ream cylinder head recess diameter for service valve seat.
●Be sure to ream in circles concentric to the valve guide center.
●This will enable valve seat to fit correctly.
3. Heat cylinder head to 110 to 130°C (230 to 266°F) by soaking in
heated oil.
4. Provide valve seats cooled well with dry ice. Force fit valve seat
into cylinder head.
CAUTION:
●Avoid directly to touching cold valve seats.
●Cylinder head contains heat. When working, wear protec-
tive equipment to avoid getting burned.
5. Using valve seat cutter set (commercial service tool) or valve
seat grinder, finish the seat to the specified dimensions.
CAUTION:
When using valve seat cutter, firmly grip the cutter handle
with both hands. Then, press on the contacting surface all
around the circumference to cut in a single drive. Improper
pressure on with the cutter or cutting many different times
may result in stage valve seat.Oversize [0.5 mm (0.020 in)]:
Intake : 31.5 mm (1.240 in)
Exhaust : 26.5 mm (1.043 in)
SEM795A
SEM008A
PBIC0579E
SEM934C

EM-66
[QG]
CYLINDER HEAD
Grind to obtain the dimensions indicated in figure.
6. Using compound, grind to adjust valve fitting.
7. Check again for normal contact.
VALVE SPRING SQUARENESS
Set try square along the side of valve spring and rotate the spring.
Measure the maximum clearance between the top face of spring and
try square.
VALVE SPRING DIMENSIONS AND VALVE SPRING PRESSURE LOAD
Check valve spring pressure with valve spring seat installed at spec-
ified spring height.
CAUTION:
Do not remove valve spring seat.Standard:
D1 dia. : 27.8 - 28.0 mm (1.094 - 1.102 in)
D2 dia. : 29.5 - 29.7 mm (1.161 - 1.169 in)
D3 dia. : 31.9 - 32.1 mm (1.256 - 1.264 in)
D4 dia. : 24.5 - 24.7 mm (0.965 - 0.972 in)
D5 dia. : 26.2 - 26.4 mm (1.031- 1.039 in)
PBIC0974E
Limit : 1.8 mm (0.071 in)
PBIC0080E
Standard:
Free height 40.0 mm (1.575 in)
Installation
height32.82 mm (1.2921 in)
Installation load 147.5 - 166.3 N (15.04 - 16.96 kg,
33.2 - 37.4 lb)
Height during
valve open23.64 mm (0.9307 in)
Load with valve
open347.8 - 392.2 N (35.5 - 40.0 kg,
78.2 - 88.2 lb)
SEM113

ENGINE ASSEMBLY
EM-67
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ENGINE ASSEMBLYPFP:10001
Removal and InstallationEBS00LQY
YEM017
1. RH engine mounting 2. RH engine mounting bracket 3. LH engine mounting
4. Rear engine mounting bracket 5. Rear engine mounting 6.Dynamic damper (Specific models
only)
7. Center member 8. Front engine mounting bracket 9. Front engine mounting

EM-68
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ENGINE ASSEMBLY
WARNING:
●Position vehicle on a flat and solid surface.
●Place chocks at front and back of rear wheels.
●Do not remove engine until exhaust system has completely cooled off, otherwise, you may burn
yourself and/or fire may break out in fuel line.
●Before disconnecting fuel hose, release pressure.
Refer to EC-34 (WITH EURO-OBD), EC-428 (WITHOUT EURO-OBD).
●Be sure to lift engine and transaxle in a safe manner.
●For engines not equipped with engine slingers, attach proper slingers and bolts described in
PARTS CATALOG.
CAUTION:
●When lifting engine, be sure to clear surrounding parts. Use special care near accelerator wire
casing, brake lines and brake master cylinder.
●When lifting the engine, always use engine slingers in a safe manner.
●When removing drive shaft, be careful not to damage grease seal of transaxle.
●Before separating engine and transaxle, remove crankshaft position sensor (POS) from the cylin-
der block assembly.
●Always be extra careful not to damage edge of crankshaft position sensor (POS), or signal plate
teeth.
Engine cannot be removed separately from transaxle. Remove engine with transaxle as an assembly.
REMOVAL
1. Drain coolant from radiator and cylinder block. Refer to LC-17, "Chacking Engine Coolant".
2. Remove coolant reservoir tank and bracket.
3. Drain engine oil.
4. Remove battery and battery tray.
5. Remove air cleaner and air duct.
6. Remove drive belts.
7. Remove alternator and air conditioner compressor from engine.
8. Remove power steering oil pump from engine and position aside.
Power steering oil pump does not need to be disconnected from power steering tubes.
9. Remove the following parts:
●RH and LH front tires
●Splash covers
●RH and LH brake caliper assemblies
Refer to BR-28,"Removal".
Brake hose does not need to be disconnected from brake
caliper assembly. Never depress brake pedal.
●RH & LH drive shaft. Refer to AX-11, "Removal".
When removing drive shaft, be careful not to damage
transaxle side grease seal.
●Disconnect control rod and support rod from transaxle. (M/T
models.)
Refer to MT-26, "Removal".
●Disconnect control cable from transaxle. (A/T models.)
Refer to AT-411, "Removal".
SEM174D
SEM109G

ENGINE ASSEMBLY
EM-69
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●Center member
●Front exhaust tube
●Stabilizer bar
●Cooling fan
●Radiator
●Disconnect wires, harness, pipes, hoses and so on.
10. Lift up engine slightly and disconnect or remove all engine
mountings.
When lifting engine, be sure to clear surrounding parts. Use
special care near brake tubes and brake master cylinder.
11. Remove engine with transaxle as shown.
INSTALLATION
●Install in reverse order of removal.
SEM108G
SEM420D

EM-70
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CYLINDER BLOCK
CYLINDER BLOCK
PFP:11010
Disassembly and AssemblyEBS00LQM
PBIC0975E

CYLINDER BLOCK
EM-71
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CAUTION:
Apply new engine oil to parts marked in illustration before installation.
DISASSEMBLY
1. Remove engine and transaxle assembly from vehicle, and separate transaxle from engine. Refer to EM-
67, "ENGINE ASSEMBLY" .
2. Mount engine on an engine stand with the following procedure.
a. Remove exhaust manifold and catalytic converter. Refer to EM-19, "
EXHAUST MANIFOLD AND CATA-
LYTIC CONVERTER" .
b. Remove engine front mounting bracket, alternator and air compressor bracket.
c. Install engine sub-attachment to left side of cylinder block.
d. Lift engine, and mount it onto the engine stand.
1. Rear oil seal 2. Rear oil seal retainer 3. Crankshaft position sensor (POS)
4. O-ring 5. Knock sensor 6. Oil level gauge guide
7. Cylinder block 8. Thrust bearing 9. Main bearing
10. Crankshaft 11. Key 12. Top ring
13. 2nd ring 14. Oil ring 15. Main bearing
16. Piston 17. Snap ring 18. Piston pin
19. Connecting rod 20. Connecting rod bearing 21. Connecting rod cap
22. Connecting rod nut 23. Main bearing cap bolt 24. Baffle plate
25. Main bearing cap 26. Signal plate 27. Rear plate
28. Coolant drain plug 29. Flywheel (M/T models) 30. Drive plate (A/T models)
PBIC0585E
PBIC1017E

EM-72
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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