Subaru XT 1988 Service Manual page 215

ENGINE 2-3
SERVICE DATA
.....
Surface warpage limit 0.075 mm (0.0030 in)
Q)
"C"C
c ra
Surface grinding limit
0.3 mm
(0.012 in)
. - Q)
>...c
Standard height 90.6 mm (3.567 in)
u
+-'
Refacing angle
90°
Q)
Wear limit 0.5 mm (0.020 in)
en
Q)
>
Contacting width Intake 1.2 - 1.8 mm (0.047 - 0.071 in)
iii
>
Exhaust 1.5 - 2.0 mm (0.059 - 0.079 in)
Q) Q)
Inner diameter 7.000 - 7.015 mm (0.2756 - 0.2762 in)
1!~
ra
:::l
>Cl
Protrusion above head 17 - 18 mm (0.67 -0.71 in)
Head edge thickness Intake STO 1.3 mm (0.051 in)
Limit 0.8mm (0.031 in)
Exhaust STO 1.3 mm
(0.051 in)
E
Limit 0.8mm (0.031 in)
Q)
+-'
Stem diameter Intake 6.950 - 6.965 mm (0.2736 - 0.2742 in)
en
Q)
~
Exhaust 6.945 - 6.960 mm
(0.2734 - 0.2740 in)
ra
>
Stem oil clearance STO Intake 0.035 - 0.065 mm (0.0014 - 0.0026 in)
(between valve guide and
Exhaust 0.040 - 0.070 mm
(0.0016 - 0.0028 in)
valve stem)
Limit 0.15 mm (0.0059 in)
Overall length
Intake
&
Exhaust
107.58 mm (4.2354 in)
Free length
Outer spring 51.7 mm
(2.035 in)
Inner spring
50.3 mm
(1.980 in)
Squareness Outer spring 2.3mm (0.091 in)
I nner spring 2.2 mm (0.087 in)
Tension/spring height Outer spring 177.5 - 204.0 N
Cl
(18.1 - 20.8 kg, 39.9 - 45.9 Ib)/
c
0.
41.5 mm (1.634 in)
en
447.2 - 513.9 N
Q)
>
(ij
(45.6 - 52.4 kg, 100.5 - 115.5 Ib)/
>
31.5 mm (1.240 in)
Inner spring 88.3 - 101.0 N
(9.0 - 10.3
kg,
19.8 - 22.7 Ib)/
38.5 mm (1.516 in)
201.0 - 230.5 N
(20.5 - 23.5 kg, 45.2 - 51.8 Ib)/
28.5 mm (1.122 in)
S10: Standard
59