Nissan Almera Tino V10. Instruction — part 852
EM-64
[QG]
CYLINDER HEAD
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
.
●
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
.
8.
When valve guide must be replaced, refer to
.
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-66, "VALVE GUIDE REPLACEMENT"
.
2.
Install valve seat. Refer to
EM-68, "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
CYLINDER HEAD
EM-65
[QG]
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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 Disassembly
EBS00QEQ
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
.
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
EM-66
[QG]
CYLINDER HEAD
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
CYLINDER HEAD
EM-67
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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.
SEM008A
PBIC0577E
Standard
Intake and exhaust
: 5.500 - 5.515 mm (0.2165 - 0.2171 in) dia.
SEM932C
EMA0487D
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