A SERVICE OF

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VALVES AND VALVE SPRINGS
3. Eliminate:
• carbon deposits
(from the valve face and valve seat)
4. Check:
• valve face
Pitting/wear → Grind the valve face.
• valve stem end
Mushroom shape or diameter larger than
the body of the valve stem → Replace the
valve.
5. Measure:
• valve margin thickness a
Out of specification → Replace the valve.
Valve margin thickness
Intake : 0.8 ~ 1.2 mm
Exhaust : 0.5 ~ 0.9 mm
6. Measure:
• valve stem runout
Out of specification → Replace the valve.
NOTE:
@
• When installing a new valve, always replace
the valve guide.
• If the valve is removed or replaced, always
replace the oil seal.
Valve stem runout
0.01 mm
EAS00240
CHECKING THE VALVE SEATS
The following procedure applies to all of the
valves and valve seats.
1. Eliminate:
• carbon deposits
(from the valve face and valve seat)
2. Check:
• valve seat
Pitting/wear → Replace the cylinder head.