Measure Piston Ring End Gap - Toyota 1C Repair Manual

EB
E
Thickness
rGauge
ENGINE MECHANICAL - Cylinder Block
EM-79
Cylinder Block
Sur1ace
Blt1S
152'20
(b) Measure tfle cylinder bore diameter (See page EM-
77)
and subtract the piston diameter measurement
from the cylinder bore diamete . r .
Maximum oil clearance: 0.15 mm (0.0059 in.I
Standard oil clearanc , e : 0 .04 - 0.06 mm
(0.001 6 - 0.0024 In.I .
If the clearance is greater than maximum, replace the all
four pistons, rebore all four cylinders or replace cylinder
block.
3.
MEASURE CLEARANCE BETWEEN PISTON GROOVE
AND NEW PISTON RING
(a) Install a new No. 1 ring to the piston and, using
a
feeler gauge, measure the No. 1 ring clearance be-
tween the new piston ring and the ring land when the
ring is flush Mth the piston surface.
Maximum clearance: 0.2 mm (0.008
in.)
(b) Using a feeler gauge, measure the No.
2
ring or oil
ring clearance between the new piston ring and the
ring land.
Maximum clearance:
0.2 mm (0.008 in.)
If the clearance is greater than the maximum. replace the
piston .
4 ,
MEASURE PISTON RING END GAP
(a) Insert the piston ring into the cylinder.
CAUTION: Do not file the ring end.
lb) Using a piston. push the piston ring to the bottom of
the ring travel.
(c)
Using a feeler gauge, measure the end gap .
Standard end gap:
No.
1 0.27 - 0.54
mm
(0.0 106 - 0.0213
in.)
No. 2 0.25 . - 0.52 mm (0.0098 - 0.0205 in.)
Oil 0.20 - 0.82 mm (0.0079 - 0 .0323 in .)
Maximum end gap :
No.
1 1.34 (0.0528
in.)
No. 2 1.32 (0.0520 in.)
Oil 1.62 (0.0638
in.)
If not within specification. replace the ring .