VALVES AND VALVE SPRINGS
5-30
EAS24280
REMOVING THE VALVES
The following procedure applies to all of the
valves and related components.
Before removing the internal parts of the cylin-
der head (e.g., valves, valve springs, valve
seats), make sure the valves properly seal.
1. Remove:
• Valve lifter “1”
• Valve pad “2”
Make a note of the position of each valve lifter
and valve pad so that they can be reinstalled in
their original place.
2. Check:
• Valve sealing
Leakage at the valve seat → Check the
valve face, valve seat, and valve seat
width.
Refer to “CHECKING THE VALVE
SEATS” on page 5-32.
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a. Pour a clean solvent “a” into the intake and
exhaust ports.
b. Check that the valves properly seal.
There should be no leakage at the valve seat
“1”.
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3. Remove:
• Valve cotters
Remove the valve cotters by compressing the
valve spring with the valve spring compressor
“1” and the valve spring compressor attach-
ment “2”.
4. Remove:
• Valve spring retainer “1”
•Valve spring “2”
•Valve “3”
• Valve stem seal “4”
• Valve spring seat “5”
Identify the position of each part very carefully
so that it can be reinstalled in its original place.
Valve spring compressor
90890-04019
YM-04019
Valve spring compressor
attachment
90890-04108
Valve spring compressor
adapter 22 mm
YM-04108
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