Toyota 2H Repair Manual page 113

2 5 mm
2 H :
9 mm
1 2 H-T:
and Oil Ring
No. 2
E N G I N E M E C H A N I C A L
I c l U s i n g solvent and a b r u s h , thoroughly clean t h e
p i s t o n .
C A U TI O N :
2 . I N S PECT PISTON D I A M ET E R AND OIL C L E A R A N C E
( a )
Using a micrometer .. m e a s u r e the piston d
right angle to the piston pin h o l e cenler line, 2 5 m m
(0.94 i n . ) or 9 m m 10. 3 5 in.) f r o m the s k i r t bottom
edge.
Standard diameter:
2 H
1 2 H - T
(b )
Measure I h e
directions
piston d iameter measurement f rom the cylinder bo
d
O i l clearance:
I f the clearance i s not within specification, replace a l l six
pistons. I f necessary. rebore a l l s i x cylinders o r replace t h e
c y l i n d e r b l o c k .
3. I N SPECT C L E A R A N C E B E T W E E N W A L L O F P I S T O N
R I N G G R O O V E A N D N E W P I S T O N R I N G
( N o . 1 R i n g )
Install a new
gauge, measure the clearance between t h e piston ring and
wall of the piston ring groove.
Ring groove c learance :
2H
1 2 H-T
[ N o . 2 and O i l R i n g l
U s i n g a f e e l e r gauge,
piston ring and t h e wall o f the piston ring groove.
Ring groove clearanc e :
No. 2
Oil
I I the clearance is not w i t h i n specif icati o n , replace the
piston
-
Cylinder Block
Do not use a wire brush.
S T D size 9 0 . 9 3 0 - 90.960 mm
(3. 5 7 9 9
.
0/5 0 . 5 0 9 1 430 - 9 1 . 4 6 0 mm
1 3 . 6 9 9 6 - 3 . 6 008 in . 1
STD size 90,940 - 90.970 mm
13.6803 - 3 . 5 8 1 5 in.1
0/5 0 . 5 0 9 1 .440 - 9 1 . 4 7 0 mm
1 3 . 6000 - 3 . 60 1 2 in.1
c i r
yl nde bore d i a meter i n t h e t h ru s t
E M - l Oa)
(See p a g e
i
ameter
2 H
0 . 0 6 0 - 0 . 0 8 0 mm
10.0024 - 0.0032 i n . 1
1 2 H · T 0.060 - 0,070 mm
10.0020 - 0.0028 in.1
NO. 1
p i s t o n r i n g to t h e p i s t o n . U s i n g a feeler
0 . 0 9 7 - 0, 1 3 7 mm
10.0038 - 0.0054 in.1
0 . 1 39 - 0 . 204 mm
10.00 6 6 - 0.0080 in.1
meas ure
0.060 - 0 . 1 00 m m
(0.0024 - 0.0039 in.)
mm
0 . 8 2 0 - 0.060
1 0 . 0 0 0 8 - 0 . 0024
E - l
M 0 3
i
ameter a t
-
3 , 5 8 1 1 i n . l
and s u b t ract t h e
t h e clearance between new
;n.1
a
r
e