Reply To: RD-17 and RD-18 exhaust leg cracks

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November 7, 2019 at 10:25 pm #186701
olcah
Participant

    US Member

    I can’t think of any reason to do so. If there is a crack it is not noticeable on the exterior of the leg and If the crack is from thermal stress, I think the crack would just reappear in a slightly different spot after welding. The motor I first noticed it on has more wear than I have ever seen on a Big Twin, really a parts motor. But even so the crack is not large and based on the above discussion does not seem to be any problem at all.