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6. VALVE SEAT RECONDITIONING
1) Thoroughly clean the combustion chambers and valve
seats to remove carbon deposits. Apply a light coat of
Prussian Blue compound or erasable felt-tipped marker ink
to the valve faces.
2) Insert the valves, and then lift them and snap them closed
against their seats several times. Be sure the valve does not
rotate on the seat. The transferred marking compound will
show any area of the seat that is not concentric.
3) Using a 45
o
cutter, remove enough material to produce a
smooth and concentric seat. Follow the valve seat cutter
manufacturer’s instructions.
Turn the cutter clockwise, never counterclockwise.
Continue to turn the cutter as you lift it from the valve seat.
TOOLS:
Cutter holder, 5.5 mm
07781-0010101
Valve seat cutter, 45
o
33 mm
07780-0010800
Valve seat cutter, 45
o
29 mm
07780-0010300
Valve seat cutter, 32
o
33 mm
07780-0012900
Valve seat cutter, 32
o
30 mm
07780-0012200
Valve seat cutter, 60
o
37.5 mm
07780-0014100
Valve seat cutter, 60
o
30 mm
07780-0014000
[1]
VALVE FACE
45
o
32
o
60
o
[2]
[IN] 33 mm : 07780-0010800
[EX] 29 mm : 07780-0010300
[3]
[IN] 33 mm : 07780-0012900
[EX] 30 mm : 07780-0012200
[4]
[IN] 37.5 mm : 07780-0014100
[EX] 30 mm : 07780-0014000
[5]
CUTTER HOLDER,
5.5 mm
07781-0010101
[1]
VALVE SEAT CUTTER
45
o
[6]
IRREGULARITIES
128
