Filter
Top Products
I
f
,.
,
,
VALVE STEM DEFLECTION
• Lift the valve about 10 mm (0.39 in) from the valve seat.
• Measure the valve stem deflection in two directions, perpen-
dicular to each other, by positioning the dial gauge as shown.
• If the deflection measured exceeds the limit, then determine
whether the valve or the guide should be replaced with a new
one.
~
Valve
stem
deflection
(IN & EX):
Service
Limit:
0.35 mm (0.014 in)
.root.
09900-20607: Dial
gauge
(1/100
mm)
09900-20701:
Magnetic
stand
VALVE STEM WEAR
• If the valve stem is worn down to the limit, as measured with a
micrometer, replace the valve.
• If the stem is within the limit, then replace the guide.
• After replacing valve or guide, be sure to recheck the deflec-
tion.
~
Valve
stem
0.0.:
Standard
(IN) : 3.975 - 3.990
mm
(0.1565 - 0.1571
in)
(EX) : 3.955 - 3.970
mm
(0.1557 - 0.1563 in)
iTUh
09900-20205:
Micrometer
(0 - 25
mm)
NOTE:
If
valve guides have to be removed for replacement after
inspecting related parts, carry out the steps shown in valve
guide servicing.
(c::=7'
3-36)
ENGINE
3-35