ME(H4DOTC)-73
Cylinder Head
MECHANICAL
2) If the clearance between valve guide and valve
stem exceeds the standard, replace the valve
guide or valve itself, whichever shows the greater
amount of wear or damage. See the following pro-
cedure for valve guide replacement.
Valve guide inner diameter:
6.000 — 6.012 mm (0.2362 — 0.2367 in)
Valve stem outer diameters:
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
(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 inner surface of valve guide holes in cyl-
inder head.
(5) Put a new valve guide, coated with sufficient
oil, in the cylinder head, and 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
ST2
18251AA020 VALVE GUIDE ADJUSTER
(6) Check the valve guide protrusion.
Valve guide protrusion L:
15.8 — 16.2 mm (0.622 — 0.638 in)
(7) Ream the inside of valve guide using ST.
Put the ST in valve guide, and rotate the ST
slowly clockwise while pushing it lightly. Bring
the ST back while rotating it clockwise.
NOTE:
• Apply engine oil to the ST when reaming.
• If the inner surface of valve guide is damaged,
the edge of ST should be slightly ground with oil
stone.
• If the inner surface of valve guide becomes lus-
trous and the ST does not chip, use a new ST or
remedy the ST.
ST
499767400
VALVE GUIDE REAMER
(8) After reaming, clean the valve guide to re-
move chips.
(9) Recheck the contact condition between
valve and valve seat after replacing the valve
guide.
ME-00128
ST1
ST2
ST
L
ME-00757
ME-00130
ST1
ST2
ME-00294
Содержание 2009 IMPREZA
Страница 18: ...PC 4 Precaution PRECAUTION...
Страница 21: ...NT 4 Note NOTE Lift Rigid rack A Attachment NT 00241 A A Attachment NT 00242 A...
Страница 23: ...NT 6 Note NOTE A Front B Rear 1 Front crossmember 2 Rear differential 1 2 A B NT 00210...
Страница 25: ...NT 8 Note NOTE TIE DOWN HOOK EYE BOLT A Front tie down hook B Rear tie down hook C Eye bolt NT 00213 A B C...
Страница 66: ...PI 22 Pre delivery Inspection PRE DELIVERY INSPECTION...
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