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Chapter 6 INSPECTION AND REPAIR OF BASIC ENGINE
1.15 Distortion of Cylinder Head Bottom Surface - Measure
With a straight edge placed on the bottom face of cylinder
head, measure the bottom face distortion with thickness
gauges. If the value exceeds the limit, replace the cylinder
head with a new one, or repair by grinding.
After grinding, record the maximum depth of grinding. Note
that total grinding amount, which includes grinding depth of
top face of crankcase, must be 0.50 mm [0.020 in.] or less.
Distortion of Cylinder Head Bottom Surface - Measure
Height of Cylinder Head - Measure
Refacing depth of cylinder head is to be minimum.
Excessive grinding of the cylinder head may result in
defects such as contact between piston and valve.
Item Standard value Limit value
Distortion of cylinder head
bottom surface
0.03 mm [0.0012 in.]
or less
0.07 mm
[0.0028 in.]
The height of cylinder head
(reference value)
154.9 to 155.1 mm
[6.098 to 6.106 in.]
-
Cylinder head
154.9 to 155.1 mm
[6.098 to 6.106 in.]
Cylinder head bottom
face roughness
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