Subaru Legacy 2005 Service Manual page 1132

MECHANICAL
2) If the clearance between valve guide and stem
exceeds the standard, replace the valve guide or
valve itself whichever shows greater amount of
wear or damage, etc. See the following procedure
for valve guide replacement.
Valve guide inner diameter:
6,000 — 6.012 mm (0.2362 — 0.2367 in)
Valve stem outer diameter:
Intake
5.955 — 5.970 mm (0.2344 — 0.2350 in)
Exhaust
5.945 — 5.960 mm (0.2341 — 0.2346 in)
(1) Place the cylinder head on ST1 with the
combustion chamber upward so that valve
guides fit the holes in ST1.
(2) Insert the ST2 into valve guide and press it
down to remove the valve guide.
ST1 498267600 CYLINDER HEAD TABLE
ST2 499767200 VALVE GUIDE REMOVER
ST2
(3) Turn the cylinder head upside down and
place the ST as shown in the figure.
ST 18251AA020 VALVE GUIDE ADJUSTER
(4) Before installing a new valve guide, make
sure that neither scratches nor damages exist
on the inside surface of the valve guide holes in
cylinder head.
Cylinder Head
ST1 499767200
ST2 18251AA020 VALVE GUIDE ADJUSTER
Valve guide protrusion L:
ST 499767400
ST1 NOTE:
• Apply engine oil to the reamer when reaming.
• If the inner surface of the valve guide is torn, the
ME-00128
edge of the reamer should be slightly ground with
an oil stone.
• If the inner surface of the valve guide becomes
lustrous and the reamer does not chip, use a new
reamer or remedy the reamer.
ST
ME-00757
ME(H4DOTC)-66
(5) Put a new valve guide, coated with sufficient
oil, in cylinder, and insert the ST1 into valve
guide. Press in until the valve guide upper end is
flush with the upper surface of ST2.
VALVE GUIDE REMOVER
ST1
ST2
(6) Check the valve guide protrusion.
15.8 — 16.2 mm (0.622 — 0.638 in)
(7) Ream the inside of valve guide using ST.
Put the reamer in valve guide, and rotate the
reamer slowly clockwise while pushing it lightly.
Bring the reamer back while rotating it clock-
wise. After reaming, clean the valve guide to re-
move chips.
VALVE GUIDE REAMER
(8) Recheck the contact condition between
valve and valve seat after replacing the valve
guide.
ME-00130