Subaru IMPREZA 2002 Service Manual page 162

CYLINDER HEAD ASSEMBLY
MECHANICAL
Squareness
Tensiodspring
height
(5) Compress the valve spring and fit the valve
spring retainer key.
2.5", 2.4 mm (0.094 in)
214.8
-
246.2
N
(21.9
-
25.1
kgf,
48.3
-
55.3
Ib)/
45.0 mm (1.772
in)
526.6
-
581.6
N
(53.7
-
59.3
kgf,
1 18.4
-
130.8
Ib)/
34.7 mm (1.366
in)
B2M26348
W
(A) Retainer key
(6) Painted face
(6) After installing, tap the valve spring retainers
lightly with wooden hammer for better seating.
E: INSPECTION
1.
VALVE SPRING
1) Check the valve springs for damage, free length,
and tension. Replace the valve spring if it is not to
the specifications presented below.
2) To measure the squareness of the valve spring,
stand the spring on a surface plate and measure its
deflection at the top using a try square.
I
~ ~~
Free lenqth
I
54.30 mm (2.1378 in)
2. INTAKE AND EXHAUST VALVE OIL
SEAL
Replace the oil seal with a new one, if the lip is
damaged or spring out of place, or when the surfac-
es of intake valve and valve seat are reconditioned
or intake valve guide is replaced. Use pliers to
pinch and remove the oil seal from valve.
1) Place the cylinder head on ST1.
2) Press-fit the oil seal to the specified dimension
indicated in the figure using ST2.
CAUTION:
Apply engine oil to oil seal before press-fit-
ting.
When press-fitting the oil seal, do not use a
hammer or strike in.
Differentiate between the intake valve oil seal
and exhaust valve oil seal by noting their differ-
ence in color.
ST1 498267800 CYLINDER HEAD TABLE
ST2 498857100 VALVE OIL SEAL GUIDE
Color of rubber part:
Intake [Black]
Exhaust [Brown]
Color of spring part:
Intake [Silver]
Exhaust [Silver]
M E(S0HC)-64