92
Unit:mm(in.)
Piston and piston ring Bore
Size Size code Standard Limit
Standard STD 78
(3.07 )
0.25(0.0098) 25 78.25
Standard
oversize (3.0807 ) +0.2
0.50(0.0197) 50 78.50 (+0.08)
oversize (3.0905 )
Taper and 0.01(0.0004)
out-of-round maximum
(2)Warpage of top face
Using a heavy accurate straight edge and a
feeler gauge, check the top face for warpage
in two positions lengthwise, two crosswise and
two widthwise as shown in the illustration. If
warpage exceeds the limit, reface the top face
with a surface grinder.
The maximum permissible amount of stock
to be removed from the cylinder head and
block by grinding is 0.2 mm(0.008 in.)intotal.
Checking cylinder block top face for warpage
Unit:mm(in.)
Item Standard Limit
Warpage of cylinder 0.05(0.0020) 0.10
block top face maximum (0.0039)
+0.0012
0
+0.03
0
+0.0012
0
+0.03
0
+0.0012
0
+0.03
0
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