VALVES AND VALVE SPRINGS
EAS24280
REMOVING THE VALVES
The following procedure applies to all of the
valves and related components.
IP
Before removing the internal parts of the cylinder
head (e.g., valves, valve springs, valve seats),
make sure the valves properly seal.
1. Check:
2. Valve sealing
Leakage at the valve seat →
Check the
valve face, valve seat, and valve seat width.
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a. Pour a clean solvent “a” into the intake and
exhaust ports.
b. Check that the valves properly seal.
IP
There should be no leakage at the valve seat “1”.
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2. Remove:
• Valve cotters “1”
IP
Remove the valve cotters by compressing the
valve spring with the valve spring compressor
and the valve spring compressor attachment “2”.
3. Remove:
• Upper spring seat “1”
• Valve spring “2”
• Valve “3”
• Valve stem seal “4”
• Lower spring seat “5”
IP
Identify the position of each part very carefully so
that it can be reinstalled in its original place.
EAS24290
CHECKING THE VALVES AND VALVE
GUIDES
The following procedure applies to all of the
valves and valve guides.
1. Measure:
• Valve-stem-to-valve-guide clearance
Out of specification → Replace the valve
guide.
• Valve-stem-to-valve-guide clearance =
Valve guide inside diameter “a” -
Valve stem diameter “b”
2
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