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As a result
of the previous
measurement,
if the
piston
to
cylinder
clearance
exceeds
the
limit
shown
in the
table
below, overhaul
the cylinder
and use an oversize piston, or replace both cylinder
and piston.
| Service Limit
PISTON
RING-GROOVE
CLEARANCE
Using
a
thickness
gauge,
measure
the side clea-
rance of the 1st and 2nd rings. If any of the clea-
rances
exceeds
the limit, replace
both
piston and
piston rings.
Thickness gauge
|
Service Limit
0.120 mm
(0.0047 in)
F 09900-20803
Piston ring-groove clearance
a
Piston ring
Piston ring groove width
Piston ring
Standard
: by
"1.21 —1.24mm
(0.047 — 0.049 in)
1.21 — 1.23 mm
d
an
(0.047 — 0.048 in)
Oil
2.81 — 2.83 mm
(0.110 — 0.111 in)
Piston ring thickness
Piston ring
Standard
1.175 — 1.190 mm
(0.0463 — 0.0469 in)
1st and 2nd
NOTE:
Using
a
soft-metal
scraper,
decarbon
the
crown
of the piston. Clean the ring grooves
similarly.
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