Used AL-31F engines rebuilt possible?

[Jet_Jet]

Yes you are wrong ... there are probably not 100% the same dimensions, but at least they were interchangeable. We know several J-10A and Bs and also J-11s once with AL-31F/FN, later with WS-10 and also again with AL-31. So they are surely interchangeable.

Thanks for clarifying this issue. Have you read the personal messages i have sent to you?. Thanks again.