VALVES AND VALVE SPRINGS
6. Measure:
NOTE:
@
• When installing a new valve, always replace
• If the valve is removed or replaced, always
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EAS00240
CHECKING THE VALVE SEATS
The following procedure applies to all of the
valves and valve seats.
1. Eliminate:
2. Check:
3. Measure:
a. Apply Mechanic's blueing dye (Dykem) b
b. Install the valve into the cylinder head.
c. Press the valve through the valve guide and
d. Measure the valve seat width.
4 - 28
• valve stem runout
Out of specification → Replace the valve.
the valve guide.
replace the oil seal.
Valve stem runout
0.01 mm
• carbon deposits
(from the valve face and valve seat)
• valve seat
Pitting/wear → Replace the cylinder head.
• valve seat width a
Out of specification → Replace the cylinder
head.
Valve seat width
Intake
0.9 ~ 1.1 mm
Exhaust
0.9 ~ 1.1 mm
onto the valve face.
onto the valve seat to make a clear impres-
sion.
ENG