INSPECTION AND REPAIR OF BASIC ENGINE
6-19
4.12 Measuring distortion cylinder block top
surface
&$87,21
Refacing of cylinder head should be kept to an abso-
lute minimum.
Excessive grinding of the cylinder head may result in
defects such as defective combustion and stamping
(contact between piston and valve).
Apply a straight edge to the top surface of the cylinder block
and measure its distortion using a feeler gauge.
If the distortion exceeds the limit, grind the cylinder block
using a surface grinder.
Measuring crankcase top surface distortion
Item Standard Limit
Distortion of cylinder block
top surface
0.05 mm
[0.0020 in.] or less
0.10 mm
[0.0039 in.]
Measuring points and directions
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