DV11
Operation and Maintenance
74
Measurement and Inspection of Major Parts
Printed in Mar. 2005 PS-MMA0608-E1A
d) Valve spring
z Inspect the outlook of valve
spring and if necessary replace
it.
z By means of spring tester,
measure the tension and free
length.
Free length Standard
Intake Inside 62.5 mm
Inside 62.0 mm
Exhaust
Outside 62.5 mm
z Measure the perpendicularity of valve spring.
z In case that the measured value exceeds the limit value, replace it.
< Valve spring tension >
Set length
Spring
force
Limit
44 mm 39.4 kg ±2 kg
Intake Inner
31.6 mm 65.8 kg ±2.5 kg
41 mm 20.5 kg ±1.5 kg
Inner
28.6 mm 32.6 kg ±2 kg
44 mm 39.4 kg ±2 kg
Exhaust
Outer
31.6 mm 65.8 kg ±2.5 kg
z Valve spring inclination
Use a surface plate and a square
to measure the valve spring
inclination.
If the measured value exceeds the
specified limit, the valve spring
must be replaced.
Spring tester
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