MECHANICAL
01-10–27
01-10
3. Inspect the valve seat for sinkage. Measure the
protruding length (dimension L) of the valve stem
using a valve of standard length.
•
If it is not within the specification, replace the
cylinder head.
Standard valve seat sinkage amount
(Dimension L)
IN: 48.93—50.17 mm {1.927—1.975 in}
EX: 48.87—50.11 mm {1.925—1.972 in}
End Of Sie
VALVE, VALVE GUIDE INSPECTION
id011000506200
1. Measure the valve head margin thickness using a
vernier caliper.
•
If it is less than the standard specification,
replace the valve.
Standard valve head margin thickness
IN: 1.75—1.95 mm {0.0689—0.0767 in}
EX: 1.95—2.15 mm {0.0768—0.0846 in}
2. Measure the length of the each valve using a
vernier caliper.
•
If it is less than the minimum specification,
replace the valve.
Standard valve length
IN: 107.00—107.60 mm {4.2127—4.2362 in}
EX: 117.09—117.69 mm {4.6099—4.6334 in}
Minimum valve length
IN: 106.78 mm {4.2039 in}
EX: 116.87 mm {4.6012 in}.
3. Measure the valve stem diameter of each valve
using the micrometer. Measurement positions
total six and are in the X and Y directions, at three
points (A, B, and C) as shown in the figure.
•
If it is less than the minimum specification,
replace the valve.
Standard valve stem diameter
IN: 5.470—5.485 mm {0.2154—0.2159 in}
EX: 5.465—5.480 mm {0.2152—0.2157 in}
Minimum valve stem diameter
IN: 5.424 mm {0.2135 in}
EX: 5.419 mm {0.2133 in}
L
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MARGIN THICKNESS
IN : 34.0 mm {1.34 in}
EX : 29.0 mm {1.14 in}
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X
Y
A
B
C
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1A36-1U-12L.book 27 ページ ２０１２年１２月１０日 月曜日 午前９時２５分
