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ENGINE

B–13

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}

End Of Sie

AME2224E313

AME2224E314

AME2224E315

AME2224E073

1731-1E-02C.book 13 ページ２００２年４月２６日金曜日午前１０時３０分

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Mazda LF Wartungshandbuch Seite 30