Ch. 6 CYLINDER HEAD & VALVE
6-12
Use 60∘cutter to cut the quarter lower parts out.
Remove the cutter and check the new valve seat.
Use 45∘cutter to grind the valve seat to
specified width.
Caution
Make sure that all roughness and uneven
faces had been ground.
Grind valve seat again if necessary.
Coat the valve seat surface with red paint.
Install the valve through valve guide until the
valve contacting with valve seat, slightly press
down the valve but do not rotate it so that a seal
track will be created on contact surface.
Caution
The contact surfaces of valve and valve
seat are very important to the valve sealing
capacity.
If the contact surface is too high，grind the valve
seat with 32∘cutter.
Then，grind the valve seat to specified width.
If the contact surface is too low, grind the valve
seat with 60∘cutter.
Then, grind the valve seat to specified width.
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