Mazda L8 Workshop Manual page 30

3. Measure the stem diameter of each valve in X
and Y directions at the three points (A, B, and C)
as indicated in the figure.
• If not as specified, replace the valve.
Standard diameter:
IN: 5.470—5.485 mm {0.2154—0.2159 in}
EX: 5.465—5.480 mm {0.2152—0.2157 in}
Maximum diameter:
IN: 5.440 mm {0.2142 in}
EX: 5.435 mm {0.2140 in}
4. Measure the inner diameter of each valve guide
in X and Y directions at the three points (A, B, and
C) as indicated in the figure.
• If not as specified, replace the valve guide.
Standard Inner diameter:
IN: 5.509—5.539 mm {0.2169—0.2180 in}
EX: 5.509—5.539 mm {0.2169—0.2180 in}
5. Calculate the valve stem to guide clearance by
subtracting the outer diameter of the valve stem
from the inner diameter of the corresponding
valve guide.
• If not as specified, replace the valve and/or
the valve guide.
Standard clearance:
IN: 0.024—0.069 mm {0.0009—0.0027 in}
EX: 0.029—0.074 mm {0.0012—0.0029 in}
Maximum clearance:
0.10 mm {0.004 in}
6. Measure the protrusion height (dimension A) of
each valve guide without lower valve spring seat.
• If not as specified, replace the valve guide.
Standard diameter:
IN: 12.2—12.8 mm {0.481—0.503 in}
EX: 12.2—12.8 mm {0.481—0.503 in}
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ENGINE
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AME2224E313
AME2224E314
AME2224E315
AME2224E073
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