Patent ID: 8316699

Claim:
A valve clearance measuring and adjusting method for a cylinder head which includes a valve assembled to a cylinder head main body, a rocker arm which is connected at one end to an end of the valve, and a can shaft which comes into contact with a cam shaft abutment portion of the rocker arm having an arcuate surface so as to open and close the valve, the rocker arm including an adjust screw for adjusting a valve clearance between the cam shaft and the cam shaft abutment portion, the method being characterized by comprising: a step of bringing a pair of probes each having a round tip end slightly larger than the valve clearance into direct contact with the cam shaft and the cam shaft abutment portion and measuring a center-to-center distance between the two tip ends; a calculating step of calculating and measuring an actual valve clearance value on the basis of the center-to-center distance between the tip ends; and an adjusting step of rotating the adjust screw in an arbitrary direction, while measuring the actual valve clearance value in real time, to thereby adjust the actual valve clearance value to a desired valve clearance value.