Suzuki AN400 Service Manual page 74

3-28 ENGINE
VALVE HEAD RADIAL RUNOUT
• Place a dial gauge as shown and measure valve head radial
runout.
• If the service limit is exceeded, replace the valve.
' Valve head radial runout (IN & EX):
Service Limit: 0.03 mm (0.001 in)
% 09900-20607: Dial gauge (1/100 mm)
09900-20701: Magnetic stand
09900-21304: V-block (100 mm)
VALVE STEM DEFLECTION
• Lift the valve about 10mm from the valve seat.
• Measure the valve stem diflection in two directions, perpen-
dicular to each other,by positioning the dialgange as shown.
• If the diflection measured exceed 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 (0.01 in)
% 09900-20607: Dial gauge (1/100 mm)
09900-20701: Magnetic stand
VALVE STEM DIAMETER
• If the valve stem deflection exceeds the service limit, measure
the valve stem outside diameter.If the diameter measured is
within the standard range, replace the valve guide.
• For each of upper, middle and lower sections within the slid-
ing range, two measurements, each in crosswise direction
must be taken.
' Valve stem O.D.:
Standard (IN): 4.975 – 4.990 mm (0.1959 – 0.1965 in)
(EX): 4.955 – 4.970 mm (0.1951 – 0.1957 in)
% 09900-20205:Micrometer (0 – 25 mm)
NOTE:
If valve guides have to be replaced, refer to the valve guide ser-
vicing.
VALVE GUIDE SERVICING
• Using the valve guide remover, drive the valve guide out
toward the intake or exhaust camshaft side.
% 09916-44310: Valve guide remover/installer
NOTE:
* Discard the remove valve guide subassemblies.
* Only oversized valve guides are available as replacement
parts. (Part No.11115-14D71)