Nissan Silvia. Manual — part 234
SEM936C
2.
Check diameter of lash adjuster.
Outer diameter:
16.980 - 16.993 mm (0.6685 - 0.6690 in)
SEM084D
3.
Check lash adjuster guide hole diameter.
Inner diameter:
17.000 - 17.020 mm (0.6693 - 0.6701 in)
Standard clearance between lash adjuster and adjuster
guide hole:
0.007 - 0.040 mm (0.0003 - 0.0016 in)
SEM694D
ROCKER ARM, SHIM AND ROCKER ARM GUIDE
NMEM0019S15
Check contact and sliding surfaces of rocker arms, shims and
rocker arm guides for wear or score.
Assembly
NMEM0020
CAUTION:
I
When installing rocker arms, camshaft and oil seal, lubri-
cate contacting surfaces with new engine oil.
I
When tightening cylinder head bolts, camshaft sprocket
bolts and camshaft bracket bolts, lubricate bolt threads
and seat surfaces with new engine oil.
SEM595D
1.
Install valve component parts.
I
Install valves, noting their identification marks as indi-
cated in the table below.
Identification mark
Intake valve
53J
Exhaust valve
5J
GI
MA
LC
EC
FE
CL
MT
AT
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
CYLINDER HEAD
Inspection (Cont’d)
EM-49
SEM085D
I
Always use new valve oil seal.
Refer to EM-34.
I
Before installing valve oil seal, install valve spring seat.
I
Install valve spring (uneven pitch type) with its narrow
pitched side (paint mark) toward cylinder head side.
I
After installing valve components, use plastic hammer to
lightly tap valve stem tip to assure a proper fit.
SEM093D
2.
Check hydraulic lash adjusters.
a.
Push on the rocker arm above the hydraulic lash adjuster. If it
moves 1 mm (0.04 in) or more, there is air in the high pressure
chamber of hydraulic lash adjuster.
Noise will be emitted from hydraulic lash adjuster if engine is
started without bleeding air.
AEM117
b.
Remove hydraulic lash adjuster and dip in a container filled
with new engine oil. While pushing plunger as shown in figure,
lightly push check ball using a thin rod. Air is completely bled
when plunger no longer moves.
Air cannot be bled from this type of lash adjuster by running
engine.
SEM057G
3.
Install, rocker arms, shims, rocker arm guides and hydraulic
lash adjusters.
CAUTION:
Install parts in their original positions.
4.
Select a suitable shim when replacing following parts with a
new one: valve, cylinder head, shim, rocker arm guide and
valve seat. Proceed as follows to select the shim of correct
thickness.
a.
Install valve component parts to cylinder head (Except shim).
b.
Remove hydraulic lash adjuster.
CYLINDER HEAD
Assembly (Cont’d)
EM-50
SEM365DA
c.
Install Tool* into hydraulic lash adjuster fixing hole.
* Tool (KV10115700) is screwed into magnetic stand rod used
with dial gauge.
SEM899D
d.
Make sure that the following parts are installed to the cylinder
head: valve, valve spring, collet, retainer, and rocker arm guide
(except shim). Measure difference (T
1
) between contact sur-
faces of rocker arm guide and valve stem end on shim side.
When measuring, lightly pull dial indicator rod toward you
to eliminate play in Tool (KV10115700).
SEM096D
e.
Select proper shim.
Shim thickness (T): T
1
±
0.025 mm (0.0010 in)
I
Shims are available in different thicknesses from 2.800 mm
(0.1102 in) to 3.200 mm (0.1260 in) in increments of 0.025 mm
(0.0010 in).
SEM019F
5.
Install water outlet.
1)
Remove all traces of liquid gasket from mating surface using
a scraper.
I
Also remove traces of liquid gasket from mating surface of
cylinder head.
2)
Apply a continuous bead of liquid gasket to mating surface of
water outlet.
I
Use Genuine Liquid Gasket or equivalent.
GI
MA
LC
EC
FE
CL
MT
AT
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
CYLINDER HEAD
Assembly (Cont’d)
EM-51
6.
Install intake manifold.
Refer to EM-52, “Installation”.
SEM073D
Installation
NMEM0041
1.
Set No. 1 piston at TDC on its compression stroke.
SEM353D
2.
Before installing cylinder head gasket, apply a continuous
bead of liquid gasket to mating surface of cylinder block.
SEM388G
SEM877A
3.
Install cylinder head completely with intake manifold.
I
Apply engine oil to threads and seating surfaces of cylin-
der head bolts before installing them.
I
Be sure to install washers between bolts and cylinder
head.
CAUTION:
Cylinder head bolts are tightened by plastic zone tightening
method. Whenever the size difference between d1 and d2
exceeds the limit, replace them with new ones.
Limit (d1 − d2):
0.15 mm (0.0059 in)
I
If reduction of outer diameter appears in a position other
than d2, use it as d2 point.
I
Lubricate threads and seat surfaces of the bolts with new
engine oil.
CYLINDER HEAD
Assembly (Cont’d)
EM-52
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