Subaru 1600 Service Manual page 86

AS·061
Fig.
3-88
Grinding valve
3) Put a small amount of grinding
compound on the seat surface and lap
the valve and seat surface. Also refer
to 2. Cylinder Head 3) at this time.
Install a new intake valve oil seal after
lapping.
6. Valve Springs
Check valve springs for damage,
free length, and tension. Replace
valve spring if it is not to the specifi·
cations presented below.
NOTE:
To measure the squlreness of the valve
spring, stand the spring on
I
surface
plate and measure its deflection at the
top using
I
try square.
A5·062
Fig.
3-89 Checking
spring squareness
ENGINE
Specifications of valve spring with solid valve lifter
~
Outer spring
Inner spring
Free length
45.3 mm (1.783 in) 48.8 mm (1.921 in)
146.1 - 169.7 N 84.3 - 98.1 N
(14.9 - 17.3 kg,
(8.6 - 10.0 kg,
32.9 - 38.11b)1
19.0 - 22.1lb)1
39.5 mm (1.555 in) 37.5 mm (1.476 in)
Tension/spring height
500.2 - 568.8 N
185.4 - 214.8 N
(51.0 - 58.0 kg,
(18.9 - 21.9 kg.
112.5 - 127.91b)1
41.7 - 48.3 Ib)1
30.5 mm (1.201 in) 28.5 mm (1.l22 in)
.
2.0 mm (0.079 in) 2.1 mm (0.083 in)
Squareness
or less or less
Specifications of valve spring with hydraulic valve lifter
---------
Outer spring Inner spring
Freelengtb
48.5 mm (1.909 in) 53.0 mm (2.087 in)
228.5 - 261.8 N 115.7 - 133.4 N
(23.3 - 26.7 kg, (ll.8 - 13.6 kg,
51.4 - 58.9Ib)/ 26.0 - 30.0 Ib)/
39.5 mm (1.555 in)
37.5 mm (1.476 in)
Tension/spring height
518.8 - 599.2 N 201.0 - 230.5 N
(52.9 - 61.1 kg,
(20.5 - 23.5 kg,
116.6 - 134.7Ib)1 45.2 - 51.8Ib)/
32.0 mm (1.260 in) 30.0mm(1.l81 in)
Squareness
2.1 mm (0.083 in) 2.3 mm (0.091 in)
or tess or less
7. Valve Rocker
1) Inspect the inner surface of valve
rocker arm and the outer surface of
rocker shaft for wear.
Oearance
0.013 - 0.052 mm
between rocker
(0.0005 - 0.0020
in)
arm and shaft
Inner diameter
18.016 - 18.034 mm
of rocker arm (0.7093 - 0.7100
in)
Outer diameter 17.982 - 18.003 mm
of shaft (0.7080 - 0.7088 in)
Replace valve rocker arm or shaft
if defective.
2) If the rocker arm surface that
contacts the stem head is noticeably
worn, replace the rocker arm. If worn
slightly in a stepped shape, use a valve
refacer and correct the wrface, grind·
ing as little as possible.