CYLINDER/PISTON
11-6
PISTONfPISTON RING
Inspect the piston rings for smooth movement by
rotating them.
The
rings should
be
able
to
move
in
their
grooves without catching.
Push the ring
untillhe
outer surface
of
the piston ring is
nearly flush
with the piston and
measure
the ring -la-ring
groove clearance.
SERVICE
LIMIT
:
Top
/
Second
: 0.09
mm
(0.004
In)
Insert
each
piston
ring
111
into
the
bottom
of
the
cylinder
;::=======
1=' =1
=========:;
squarely using the piston. •
Measure
t
he
ring
end
gap
. M
'"
SERVICE LIMITS:
Top
: 0.5
mm
(0.02
in)
Second: 0.6
mm
(0
.
02
in)
Oil (side rail): 0.9 mm
(0
.04 In)
Measure the piston 0 .0 . at a point 15
mm
(0.6 in) from
the bottom
and
90
· to the piston pin hole.
SERVICE
LIMIT:
91
.90
mm
(3.618 in)
Compare
this
measurement against
the
maximum
cylinder 1.0.
measurement
and calculate the piston-to-
cylinder
clearance (page 11·5).
15mm
(D
.6
in
)
,
l
•
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