Skoda 105 s 1980 Workshop Manual page 46

D K 6 2 6
Fig.2.911- Morking of Cylinder Toleronce Closs
Grode the rebored cylinder liners in the some
monner while odding the number of the re-
spective rebore before the designotion of the
Dio. 68
(stondord)
68.25 (1st rebore)
68.50 (2nd rebore)
D i o . 7 2
Fig.2.912 - Outside Dimensions of Cylinder
L i n e r
Cylinder bore 68 mm
Cyf inder bore 72 mm
toleronce closs occording to the clossificotion
toble, for exomple dio. 68.25 1A, dio. 68.50 24.
However, only cylinder liners of o nominol dio'
meter of 68 mm con be rebored. Worn liners of
72 mm nominol diometer hove to be reploced
w i t h n e w o n e s .
F o r t h e c y l i n d e r l i n e r o t r d p i s t o t r o s s e m b l y
see Chopter 2.12.
Check the diometer (bore) ot o temperoture
of 20oC which must be constont for both the
c y l i n d e r l i n e r o n d g o u g e s .
Mochining (Reboring) Cylinders
F o r m o c h i n i n g ( r e b o r i n g ) , t h e c y l i n d e r s h o u l d
be clomped only in the oxiol direction to
preclude ony distortion ond deformotion of its
bore. Depending on the mochine used for
reboring, moke o centering heod to be centred
68.00
68.01
68.02
68.25
68.26
68.27
68.50
68.51
68.52
+ 0.009
72.OO
72.O1
72.O2
+ 0.009
Fig.2.9/3 - Mochining the Cylinder
1- cylinder liner, 2 - centering heod, 3- clomp.
ing plote, 4 - clomping bolts, 5 - cutting tool
A
B
c
1 A
1 B
1C
2A
28
2C
A
B
c
d i o . D : 7 5 f 7
d i o . D : 7 6 t 7
46
Groding of Cylinder Liners According to Diometers ond Toleronce Closses
Nominol diometer
m m
Toleronce ond I
rebore closs I
I
Diometer
m m
Diometer
toleronce