Engine Tightening method for R3 model or high C.C. motorcycle
>> Sometimes in service manual mention tightening torque, some points mention more by mention more after tightening torque please tight more 90 degree.
something like this. So, we would like to know why need tight more by angle? because already fixed by tightening torque.
Ans. High accuracy part requires reliable axial tension, and angle tightening is the tightening method of reliable axial tension.
As a general trend, high spec engine requires angle tightening.
And sometimes, "tighten 1st time next, loosen 45 degree and re tighten again" such kind of this method called the tightening method of reliable axial tension also?
Ans. It's a kind of the "tightening method of reliable axial tension", but it's a method of case tightening by many bolt. (example: cylinder head of multi cylinder model)
The purpose of first tightening is fit the parts. (example: cylinder and cylinder head)
The purpose of loosening is to remove the distortion between part A and B. (example: same as above)
The purpose of final tightening is to get the reliable axial tension.
If mechanic not follow this method , what is the negative point?
Ans. it's depend on the parts.
[example]
- Connecting rod : will be broken.
- Cylinder head : there are possibility that oil leakage or power down occurs.
Engine Tightening method for R3 model or high C.C. motorcycle>> Sometimes in service manual mention tightening torque, some points mention more by mention more after tightening torque please tight more 90 degree.something like this. So, we would like to know why need tight more by angle? because already fixed by tightening torque.Ans. High accuracy part requires reliable axial tension, and angle tightening is the tightening method of reliable axial tension.As a general trend, high spec engine requires angle tightening.And sometimes, "tighten 1st time next, loosen 45 degree and re tighten again" such kind of this method called the tightening method of reliable axial tension also?Ans. It's a kind of the "tightening method of reliable axial tension", but it's a method of case tightening by many bolt. (example: cylinder head of multi cylinder model)The purpose of first tightening is fit the parts. (example: cylinder and cylinder head)The purpose of loosening is to remove the distortion between part A and B. (example: same as above)The purpose of final tightening is to get the reliable axial tension.If mechanic not follow this method , what is the negative point?Ans. it's depend on the parts.[example]- Connecting rod : will be broken. - Cylinder head : there are possibility that oil leakage or power down occurs.
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