After inserting the valve guides, use the valve
guide reamer to refinish the guide hole.
Note: when using the reamer to cut, please add the
proper amount of cutting lubricant. The
rotation direction of the reamer is clockwise.
Clear out the carbon deposits in the combustion
chamber and valve tracts, and clean the inlet valve and
exhaust valve thoroughly. Inspect the contacting
surface width of the valve seat (width of valve seat
ring).