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Engine
Valve check
CAUTION
REPLACE THE VALVES ONE AT A TIME. DO NOT MIX THE COMPONENTS. EACH VALVE MUST
BE INSERTED INTO ITS SEAT, WHICH IS MARKED PRIOR TO REMOVAL.
VALVE STEM DEVIATION
Lift up the valve approx. 10 mm (0.39 in) from its
seat.
Measure the valve stem deviation in two perpen-
dicular directions and position the dial gauge as
shown in the figure.
If the measured deviation exceeds the specified
limit, determine if the valve or the guide must be
replaced.
Characteristic
Valve stem distortion
0.25 mm (0.0098 in)
If the valve stem, when measured with a micro-
meter, is worn to its limit and the clearance ex-
ceeds the specified limit, replace the valve.
If the valve stem lies within the specific limit, re-
place the valve guide.
Recheck the clearance after replacing the valve or
the guide.
Characteristic
Intake valve stem diameter
4.985 - 4.965 mm (0.1963 - 0.1954 in)
Exhaust valve stem diameter
4.975 - 4.955 mm (0.1959 - 0.1951 in)
Support the valve with two "V" blocks as shown
and check the run-out with a dial gauge.
If the run-out exceeds the specified limit, replace
the valve.
Characteristic
Valve stem run-out
0.05 mm (0.0020 in)
ENG - 344
RSV4 Factory a-PRC
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