wsm wg972-e4 Workshop Manual page 136

WG972-E4, WSM
Free Length and Tilt of Valve Spring
1. Measure the free length (B) of valve spring with vernier calipers.
If the measurement is less than the allowable limit, replace it.
2. Put the spring on a surface plate, place a square on the side of
the spring.
3. Check to see if the entire side is in contact with the square.
Rotate the valve spring and measure the maximum tilt (A).
If the measurement exceeds the allowable limit, replace it.
4. Check the entire surface of the valve spring for scratches.
If there is any problem, replace it.
Tilt (A) Allowable limit
Factory specification
Free length (B)
Allowable limit
(A) Tilt
Valve Spring Setting Load
1. Place the valve spring on a tester and compress it to the same
length it is actually compressed in the engine.
2. Read the compression load on the gauge.
3. If the measurement is less than the allowable limit, replace it.
Factory specification
Setting load / setting
length
Allowable limit
Oil Clearance between Rocker Arm and Rocker Arm Shaft
1. Measure the rocker arm shaft O.D. with an outside micrometer.
2. Measure the rocker arm I.D. with an inside micrometer, and
then calculate the oil clearance.
3. If the oil clearance exceeds the allowable limit, replace the
rocker arm and measure the oil clearance again. If it still
exceeds the allowable limit, replace also the rocker arm shaft.
Factory specification
Oil clearance between
rocker arm and rocker
arm shaft
Allowable limit
Rocker arm shaft O.D. Factory specification
Rocker arm I.D. Factory specification
1-S45
ENGINE
1.2 mm
0.047 in.
31.3 to 31.8 mm
1.24 to 1.25 in.
28.4 mm
1.12 in.
(B) Free length
9Y1211108ENS0072US0
65 N / 27.0 mm
6.6 kgf / 27.0 mm
15 lbf / 1.06 in.
55 N / 27.0 mm
5.6 kgf / 27.0 mm
12 lbf / 1.06 in.
9Y1211108ENS0073US0
0.016 to 0.045 mm
0.00063 to 0.0017 in.
0.15 mm
0.0059 in.
10.473 to 10.484 mm
0.41233 to 0.41275 in.
10.500 to 10.518 mm
0.41339 to 0.41409 in.
9Y1211108ENS0074US0
KiSC issued 07, 2015 A