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5. Remove cylinder head loosening bolts in reverse order shown in
the figure.
6. Remove cylinder head gasket.
INSTALLATION
1. Apply liquid gasket to NISSAN ALMERA N16 2003 Electronic Repair Manual CYLINDER HEAD
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5. Remove cylinder head loosening bolts in reverse order shown in
the figure.
6. Remove cylinder head gasket.
INSTALLATION
1. Apply liquid gasket to](/manual-img/5/57350/w960_57350-136.png)
CYLINDER HEAD
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5. Remove cylinder head loosening bolts in reverse order shown in
the figure.
6. Remove cylinder head gasket.
INSTALLATION
1. Apply liquid gasket to positions shown in figure, then install cyl-
inder head gasket.
●Use Genuine Liquid Gasket or equivalent.
2. Install cylinder head assembly, tighten bolts (1) to (10) in numer-
ical order shown in figure with the following procedure:
CAUTION:
In step “d”, loosen bolts in the reverse order of that indi-
cated in figure.
a. Apply new engine oil to threads and seating surface of mounting
bolts.
b. Tighten all bolts to 29.4 N·m (3.0 kg-m, 22 ft-lb).
c. Tighten all bolts to 58.8 N·m (6.0 kg-m, 43 ft-lb).
d. Completely loosen to 0 N·m (0 kg-m, 0 ft-lb).
e. Tighten all bolts to 27.4 - 31.4 N·m (2.8 to 3.2 kg-m, 21 to 23 ft-
lb).
f. Turn all bolts 50 to 55 degrees (target: 50 degrees) clockwise.
CAUTION:
Check and confirm the tightening angle by using angle
wrench (special service tool). Avoid judgment by visual
inspection without the tool.
SEM900F
PBIC0573E
SEM900F
PBIC0574E
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3. Tighten cylinder auxiliary bolts (11) to (14) in numerical order
shown in figure.
●Pay attention to shank length under bolt head. [11: 20 mm
(0.79 in), 12 - 14: 25 mm (0.98 in)]
Disassembly and AssemblyEBS00LQJ
CAUTION:
●When installing camshafts, chain tensioners, oil seals or other sliding parts, lubricate contacting
surface with new engine oil.
●Apply new engine oil to threads and seat surface when installing cylinder head, camshaft
sprocket, crankshaft pulley and camshaft bracket.
●Attach tags to valve lifters so as not to mix them up.
DISASSEMBLY
1. Remove adjusting shim (if so equipped) and valve lifter.
●Confirm installation point.
SEM900F
PBIC0973E
1. Cylinder head 2. Valve (INT) 3. Valve (EXH)
4. Valve seat 5. Engine coolant temperature sensor 6. Copper washer
7. Spark plug tube 8. Spark plug
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2. Remove valve collet.
●Compress valve spring with valve spring compressor (special
service tool). Remove valve collet with magnet driver.
3. Remo NISSAN ALMERA N16 2003 Electronic Repair Manual CYLINDER HEAD
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2. Remove valve collet.
●Compress valve spring with valve spring compressor (special
service tool). Remove valve collet with magnet driver.
3. Remo](/manual-img/5/57350/w960_57350-138.png)
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2. Remove valve collet.
●Compress valve spring with valve spring compressor (special
service tool). Remove valve collet with magnet driver.
3. Remove valve spring retainer and valve spring.
4. Push valve stem to combustion chamber side, and remove
valve.
●Inspect valve guide clearance before removal. Refer to EM-
63, "VALVE GUIDE CLEARANCE" .
●Confirm installation point.
5. Remove valve oil seal with valve oil seal puller (special service
tool).
6. Remove valve spring seat.
7. When valve seat must be replaced, refer to EM-64, "
VA LV E
SEAT REPLACEMENT" .
8. When valve guide must be replaced, refer to EM-63, "
VA LV E
GUIDE REPLACEMENT" .
9. Remove spark plug with spark plug wrench (commercial service
tool).
10. Remove engine coolant temperature sensor.
CAUTION:
Do not shock it.
11. Remove spark plug tube, as necessary.
●Using a pair of pliers, pull spark plug tube out of cylinder head.
CAUTION:
●Take care not to damage cylinder head.
●Once removed, a spark plug tube will be deformed and cannot be reused. Do not remove it
unless absolutely necessary.
ASSEMBLY
1. Install valve guide. Refer to EM-63, "VALVE GUIDE REPLACEMENT" .
2. Install valve seat. Refer to EM-64, "
VALVE SEAT REPLACEMENT" .
3. Install valve oil seal.
●Install with valve oil seal drift (special service tool) to match
dimension in illustration.
4. Install valve spring seat.
5. Install valve.
●Install larger diameter to intake side.
6. Install valve spring.
7. Install valve spring retainer.
PBIC1015E
SEM909F
PBIC0576E
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8. Install valve collet.
●Compress valve spring with valve spring compressor (special
service tool). Install valve collet with magnet hand.
●Tap stem edge lightly with pla NISSAN ALMERA N16 2003 Electronic Repair Manual EM-62
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8. Install valve collet.
●Compress valve spring with valve spring compressor (special
service tool). Install valve collet with magnet hand.
●Tap stem edge lightly with pla](/manual-img/5/57350/w960_57350-139.png)
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8. Install valve collet.
●Compress valve spring with valve spring compressor (special
service tool). Install valve collet with magnet hand.
●Tap stem edge lightly with plastic hammer after installation to
check its installed condition.
9. Install adjusting shim (if so equipped) and valve lifter.
10. Install engine coolant temperature sensor.
●Apply Genuine Liquid Gasket or equivalent to the thread.
11. Install spark plug tube.
●Press-fit spark plug tube following procedure below.
a. Remove old liquid gasket adhering to cylinder-head mounting
hole.
b. Apply liquid gasket to area within approximately 15 mm (0.59 in)
from edge of spark plug tube press-fit side.
●Use Genuine Liquid Gasket or equivalent.
c. Using a drift, press-fit spark plug tube so that its height “H” is as
specified in the figure.
CAUTION:
●When press-fitting, take care not to deform spark plug tube.
●After press-fitting, wipe off liquid gasket protruding onto cylinder-head upper face.
12. Install spark plug with spark plug wrench (commercial service tool).
Inspection After DisassemblyEBS00LQK
CYLINDER HEAD DISTORTION
1. Wipe off oil and remove water scale (like deposit), gasket,
sealer, carbon, etc with scraper.
CAUTION:
Use utmost care not to allow gasket debris to enter pas-
sages for oil or water.
2. At each of several locations on bottom surface of cylinder head,
measure distortion in six directions.
VALVE DIMENSIONS
Check dimensions of each valve. For dimensions, refer to EM-94,
"VA LV E" .
PBIC1016E
Standard press-fit height “H” :
: 41.0 - 42.0 mm (1.61 - 1.65 in)KBIA1248E
Limit : 0.1 mm (0.004 in)
PBIC0075E
SEM188A
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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.
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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.](/manual-img/5/57350/w960_57350-140.png)
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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
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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 NISSAN ALMERA N16 2003 Electronic Repair Manual EM-64
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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](/manual-img/5/57350/w960_57350-141.png)
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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
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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 NISSAN ALMERA N16 2003 Electronic Repair Manual CYLINDER HEAD
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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](/manual-img/5/57350/w960_57350-142.png)
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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
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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 squa NISSAN ALMERA N16 2003 Electronic Repair Manual EM-66
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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 squa](/manual-img/5/57350/w960_57350-143.png)
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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