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SERVICING
6. Servicing
6.10 Checking free length of valve
spring
Tools required
• Vernier caliper
1. Measure the free length (1) of valve spring with a
vernier calipers.
NOTE
• If the measurement is less than the service
limit, replace it.
Service specifi-
cation
Free length (1)
Service limit
(1) Free length
2. Check the full surface of the valve spring for
scratches.
NOTE
• If there is a damage, replace it.
6.11 Checking tilt of valve spring
Tools required
• Surface plate
• Square
1. Put the valve spring on a surface plate, and put a
square on the side of the valve spring.
2. Turn the valve spring to measure the maximum tilt
(1).
NOTE
• If the measurement is more than the service
limit, replace it.
Tilt (1)
Service limit
05-E4B SERIES,05-E4BG SERIES
37.0 to 37.5 mm
1.46 to 1.47 in.
36.5 mm
1.44 in.
1.0 mm
0.039 in.
(1) Tilt
3. Check the full surface of the valve spring for
scratches.
NOTE
• If there is a damage, replace it.
6.12 Checking set load of valve
spring
Tools required
• Valve spring tester
1. Put the valve spring on a tester and compress the
valve spring to the specified setting length.
2. Read the compression load on the gauge.
NOTE
• If the measurement is less than the service
specification, replace the valve spring.
Service specifi-
cation
Setting load / Set-
ting length
Service limit
4. ENGINE
117.4 N / 31.0 mm
11.97 kgf / 31.0 mm
26.39 lbf / 1.22 in.
100.0 N / 31.0 mm
10.20 kgf / 31.0 mm
22.48 lbf / 1.22 in.
4-55
KiSC issued 03, 2023 A
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