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Valve
Seat, Cut
Remove
cylinder head.
See
corresponding operation in this group.
Remove
valve, valve stem seal and valve rotator.
Place
cylinder head on two wooden blocks.
Insert
Pilot KM-340-7 into valve guide as far as stop and tension.
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Position
Valve Seat Cutter KM-340-11 (230) with 45° plane on valve
seat - note arrow on tool.
Mount
handle and spacer and begin cutting, removing as little material as possible.
Carry
out cutting from vertically above, so that seat is concentric with valve
guide.
Subsequently
carry out top correction using 30° Cutter - note
arrow.
Use
same cutter for intake and exhaust valves.
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Position
of Intake and Exhaust Valves
Note
width of valve seats.
A
= Exhaust valve B = Intake valve
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Coat
valve seat with finishing paste and insert valve into guide.
Turn
valve 1/6 turn, using as little force as possible.
Lift
valve and check contact pattern. If valve does not contact properly, slightly
re-cut seat.
Lap
valves.
See
corresponding operation in this group.
Do
not re-grind end of valve stem.
Mount
valve with new valve stem seal.
Install
cylinder head.
