Subaru Impreza 2002 Service Manual page 946

(5) Put new valve guide, coated with sufficient
oil, in the cylinder, and then insert the ST1 into
valve guide. Press in until the valve guide upper
end is flush with the upper surface of ST2.
ST1 499767200 VALVE GUIDE REMOVER
Intake side:
ST2 499767700 VALVE GUIDE ADJUSTER
Exhaust side:
ST2 499767800 VALVE GUIDE ADJUSTER
(6) Check the valve guide protrusion.
Valve guide protrusion: L
Intake
20.0 — 20.5 mm (0.787 — 0.807 in)
Exhaust
16.5 — 17.0 mm (0.650 — 0.669 in)
(A) Valve guide
CYLINDER HEAD ASSEMBLY
B2M2632A
B2M0077C
ME-69
(7) Ream the inside of valve guide with ST.
Gently rotate the reamer clockwise while press-
ing it lightly into valve guide, and return it also ro-
tating clockwise. After reaming, clean the valve
guide to remove chips.
CAUTION:
• Apply engine oil to the reamer when reaming.
• If the inner surface of the valve guide is torn,
the edge of the reamer should be slightly
ground with an oil stone.
• If the inner surface of the valve guide be-
comes lustrous and the reamer does not chips,
use a new reamer or remedy the reamer.
ST 499767400 VALVE GUIDE REAMER
(8) Recheck the contact condition between
valve and valve seat after replacing valve guide.
MECHANICAL
B2M0078