If contacted place is the higher part of valve, please use a 32°angle
plain milling cutter to lower the valve race.
If contacted place is the lower part of valve, please use a 60°angle
internal milling cutter to raise the valve race.
Grind and cut valve race with a 45°angle precise milling cutter till it
meets the required specification.
After completion of valve race grinding and cutting, please apply
some polishing agent on the surface of valve. Polish the valve
gently.
12.7 Cylinder Head Installation
Install the cylinder head in the reverse order of removal.
* Attention:
While installing valve spring, the end with short spring links heads combustion chamber.
While installing valve collet, please compress valve spring with a valve spring compressor and install the valve
collet.
While installing valve, please apply appropriate amount of engine oil on the surface of valve stem, and then install it
into valve guide.
Low contact face
32°
60°
High contact face
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