CYLINDER HEAD, CYLINDER AND PISTON 6-12
VALVE STEM AND VALVE FACE WEAR CONDITION
• Visually inspect each valve stem and valve face for wear and
pitting.
• If it is worn or damaged, replace the valve with a new one.
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: 0.25 mm (0.010 in)
# 09900-20607: Dial gauge (1/100,10 mm)
09900-20701: Magnetic stand
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