Subaru 2002 IMPREZA Service Manual page 1112

MECHANICAL
6. 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.
1) Place the cylinder head on ST1.
2) Press in the oil seal to the specified dimension
indicated in the figure by using ST2.
ST1 498267600 CYLINDER HEAD TABLE
ST2 498857100 VALVE GUIDE REMOVER
CAUTION:
• Apply engine oil to oil seal before force-fit-
ting.
• Differentiate between the intake valve oil seal
and exhaust valve oil seal by noting their dif-
ference in color.
Color of rubber part:
Intake [Black]
Exhaust [Brown]
Color of spring part:
Intake [Silver]
Exhaust [Silver]
7. VALVE LIFTER
1) Check the valve lifter visually.
2) Measure the outer diameter of valve lifter.
Outer diameter:
34.959 — 34.975 mm (1.3763 — 1.3770 in)
CYLINDER HEAD ASSEMBLY
S2M1924A
B2M1222
ME(TURBO)-70
3) Measure the inner diameter of valve lifter mating
part on cylinder head.
Inner diameter:
34.994 — 35.016 mm (1.3777 — 1.3786 in)
CAUTION:
If difference between outer diameter of valve
lifter and inner diameter of valve lifter mating
part is over the limit, replace the cylinder head.
Standard:
0.019 — 0.057 mm (0.0007 — 0.0022 in)
Limit:
0.100 mm (0.0039 in)
B2M1400