Subaru Impreza 2002 Service Manual page 887

MECHANICAL
4. CYLINDER HEAD AND VALVE ASSEMBLY
(1) Exhaust valve
(2) Intake valve
(3) Valve guide
(4) Valve spring seat
GENERAL DESCRIPTION
(5) Intake valve oil seal
(6) Valve spring
(7) Retainer
(8) Retainer key
ME-10
(9) Exhaust valve oil seal
B2M1955D