Subaru XT 1988 Service Manual page 239

ENGINE
2-3
2) If the clearance between valve guide and stem exceeds the
specification, replace guide as follows:
(1)
Place cylinder head on CYLINDER HEAD TABLE
with the combustion chamber upward so that valve guides
enter the holes in CYLINDER HEAD TABLE.
(2)
Insert VALVE GUIDE REMOVER into valve guide
and' press it down to remove valve guide.
VALVE GUIDE REMOVER
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(399762103)
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CYLINDER HEAD
/ TABLE (498267100) L2-1345
Fig. 182
(3) Turn cylinder head upside down and place VALVE
GU IDE ADJUSTE R as shown in the figure.
Valve guide
protrusion: L
Fig. 183
c
L2-161
(4) Before installing new valve guide, make sure that
neither scratches nor damages exist on the inside surface
of the valve guide holes in cylinder head.
(5) Put new valve guide, coated with sufficient oil, in
cylinder, and insert VALVE GUIDE REMOVER into
valve guide. Press in until the valve guide upper end is
flush with the upper surface of VALVE GUIDE
ADJUSTER.
VALVE GUIDE REMOVER
(399762103)
L2-1346
Fig. 184
(6)
Check the valve guide protrusion.
Valve guide protrusion:
L
17 - 18 mm <0.67 - 0.71 in)
(7) Ream the inside of valve guide with VALVE GUIDE
REAMER (399762104). Gently rotate the reamer clock-
wise while pressing it lightly into valve guide, and return it
. also rotating clockwise. After reaming, clean valve guide
to remove chips.
a. Apply engine oil to the reamer when reaming.
b. If the inner surface of the valve guide is torn, the edge of
the reamer should be slightly ground with an oil stone.
c. If the inner surface of the valve guide becomes lustrous and
the reamer does not cut chips, use a new reamer or remedy the
reamer.
.'
(8) Recheck the contact condition between valve and
valve seat after replacing valve guide.
INTAKE AND EXHAUST VALVE OIL SEAL
Replace oil seal with new one, if lip is damaged or spring is out
of place, or when the surfaces of intake valve and valve seat are
reconditioned or intake valve guide is replaced.
Press in oil seal to the specified dimension indicated in the
figure, using OIL SEAL INSTALLER.
B3
OIL SEAL
INSTALLER
(398852100)
Fig. 185
L2-1347