Cylinder Block - Mitsubishi S3L Service Manual

INSPECTION
Figure 110 Measuring bore in cylinder block
Figure 111 Checking cylinder block top face for
warpage
Service Manual Mitsubishi SL-Series diesel engines
Version 08/2004
CYLINDER BLOCK, CRANKSHAFT,

19.4 Cylinder block

1. Bore
Measure the bore at the top, middle and bottom
points on axes A and B with a cylinder bore gauge
as shown in the illustration. If any one of the cylin-
ders exceeds the limit, hone out all the bores for
oversize pistons.
Pioston and piston ring
Size Size code
Standard
0.25 (0.009 8)
oversize
0.50 (0.019 7)
oversize
Taper and out-of-round
2. Warpage of top face
Using a heavy accurate straight edge and a feeler
gauge, check the top face for warpage in two posi-
tions lengthwise, two crosswise and two widthwise
as shown in the illustration. If warpage exceeds
the limit, reface the top face with a surface grinder.
CAUTION
The maximum permissible amount of stock to be
removed from the cylinder head and block by grinding
is 0.2 mm (0.008 in.) in total.
Item
Warpage of cylinder
block top face
ENGLISH
PISTONS AND OIL PAN
Unit: mm (in.)
Bore
Standard
+0.03
STD 78
0
+0.0012
(3.07 )
0
+0.03
25 78.25
0
+0.0012
(3.0807 )
0
+0.03
50 78.50
0
+0.0012
(3.0905 )
0
0.01 (0.000 4)
maximum
.Unit: mm (in.)
Standard
0.05 (0.002 0)
maximum (0.003 9)
Limit
Standard:
+0.2
(+0.008)
—
Limit
0.10
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