Valve Seat Reconditioning - Honda BF40D Manuel D'utilisation

6. VALVE SEAT RECONDITIONING

1) Thoroughly clean the combustion chambers and valve
1
seats to remove carbon deposits. Apply a light coat of
Prussian Blue compound or erasable felt-tipped marker ink
2
to the valve faces.
3
2) Insert the valves, and then lift them and snap them closed
against their seats several times. Be sure the valve does not
4 rotate on the seat. The transferred marking compound will
show any area of the seat that is not concentric.
5
6
o
3) Using a 45 cutter, remove enough material to produce a
smooth and concentric seat. Follow the valve seat cutter
7
manufacturer's instructions.
8
Turn the cutter clockwise, never counterclockwise.
Continue to turn the cutter as you lift it from the valve seat.
9
TOOLS:
Cutter holder, 5.5 mm
10
Valve seat cutter, 45
Valve seat cutter, 45
11
Valve seat cutter, 32
Valve seat cutter, 32
12
Valve seat cutter, 60
Valve seat cutter, 60
13
14
15
16
17
18
19
20
9-21
07781-0010101
o
33 mm 07780-0010800
o
29 mm 07780-0010300
o
33 mm 07780-0012900
o
30 mm 07780-0012200
o
37.5 mm 07780-0014100
o
30 mm 07780-0014000
[1]
VALVE FACE
[1]
VALVE SEAT CUTTER
o
32
[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
128
o
45
[2]
[IN] 33 mm : 07780-0010800
[EX] 29 mm : 07780-0010300
o
60
[6]
IRREGULARITIES
o
45