Subaru Legacy 2004 Service Manual page 289

1) Installation of valve spring and valve:
(1) Place the cylinder head on the ST.
ST 498267800 CYLINDER HEAD TABLE
(2) Coat the stem of each valve with engine oil
and insert the valve into valve guide.
CAUTION:
Use extreme care not to damage the oil lips
when inserting the valve into valve guide.
(3) Install the valve spring and retainer.
NOTE:
Be sure to install the valve springs with their close-
coiled end facing the seat on the cylinder head.
(4) Set the ST on valve spring.
ST 499718000 VALVE SPRING REMOVER
ST
(5) Compress the valve spring and fit the valve
spring retainer key.
(A) Retainer key
(B) Valve springs
(6) After installing, tap the valve spring retainers
lightly with a plastic hammer for better seating.
Cylinder Head
E: INSPECTION
1. VALVE SPRING
1) Check the valve springs for damage, free length,
and tension. Replace the valve spring if it is not
within the standard value presented in the table.
2) To measure the squareness of the valve spring,
stand the spring on a surface plate and measure its
deflection at the top of spring using a try square.
ME-00280
2. INTAKE AND EXHAUST VALVE OIL
SEAL
(B)
In the following case, pinch and remove the oil seal
from valve using pliers, and then replace it with a
new one.
• When the lip is damaged.
• When the spring is out of the specified position.
(A)
(B)
• When readjusting the surfaces of intake valve
and valve sheet.
ME-00282
• When replacing the intake valve guide.
1) Place the cylinder head on ST1.
2) Using ST2, press-fit the oil seal.
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
ST2
Color of rubber part:
ME(H4SO 2.0)-59
Free length
54.30 (2.1378)
mm (in)
214 — 246
Set
Tension/spring
(22 — 25, 48 — 55)/45.0 (1.772)
height
526 — 582
N (kgf, lb)/mm
Lift (54 — 59, 119 — 130)/34.7
(in)
(1.366)
Squareness 2.5#, 2.4 mm (0.094 in)
498267800 CYLINDER HEAD TABLE
498857100 VALVE OIL SEAL GUIDE
Intake [Black]
Exhaust [Brown]
MECHANICAL
ME-00283