【6-18】
NGINE
Valve stem wear
● If the valve stem is worn down to the limit, as measured with a
micrometer, where the clearance is found to be in excess of the limit
indicated, replace the valve; if the stem is within the limit, then
replace the guide.
● Measure OD of Valve Stem sliding portion at total 6 points; upper,
middle and lower positions and X- and Y-directions, by means of
micrometer.
Service Limit of Valve Guide OD
IN 5.450 to 5.465 mm
EX 5.430 to 5.445 mm
Valve Spring
● Measure the free length of Valve Spring.
● Check the force required to compress the spring.
● If the result is not correct, replace the spring.
Service Limit of Valve spring free length
IN & EX 46.1 mm
Service Limit of Valve spring free length
IN & EX 19.0~21.4kgf / 36.50mm
Water bypass union and oil pressure gauge
● Remove the oil pressure gauge [1] and water bypass union [2]
● Apply thread lock to the thread part of water bypass union and
tighten it to the specified torque.
Torque - Water bypass union: 14 N-m
Thermostat
● Remove the thermostat cover [1].
● Remove the thermostat.
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