Mazda 121 - Cylinder Block; Rocker Arm and Rocker Arm Shaft

INSPECTION
/
REPAIR
Rocker
Arm
and
Bocker
Arm
Shaft
1 . Check
for
wear or
damage
to the
contact
surface
of the rock-
er arm
shatt
or the
rocker
arm-
Replace
if necessary
2. Checkthe
oilclearance
between
the
rocker arm
and shalt
Replace
if necessary.
(1)
Measure
the
rocker
arm
inner diameter'
Diameter
B3
IN EX
1 9.000-l
9.033
(0.7480-0.7493)
(2)
Measure
the rocker
arm
shatt
diameler'
Diameter
B3
lN,
EX
1&959-18.980
(0.7464-0.7472)
(3)
Subt.act
the
shaft
diameter
from the
rocke' arm di'
ameler.
Oil clearance
mm
(in)
CYLINOER
BLOCK
1. Checkthe
cylinder
blocklorthe
following
and
'epalr or
re-
place
the cylinder
block as
necessary
(1)
Leakage
damage
(2)
Cracks.
(3)
Sconng
ol
wall
Z. Miasure thi
distonion
oflhe
top
sLriace
oi lhecvlinder
block
in the
slx directions
shown
in
figure
Distortion:0.15mm
(0.006 in)
max.
3. lf the distortion
exceeds
the maximum.
repair
by
grinding
or replace
the
cylinder
biock
Height: 22l.smm
(8'720 in)
Grinding:
0.20mm
(0'008
in)
max.
G
B3
tN,
EX
0o20-o
074
(0
0008-0.0029)
010
(0.004)
B-54