Join Date: Apr 2006
Location: Sharpsburg, GA
If the header is not used, have the machine shop true up the flange using a press and then take a thin skim off the flange surface using a surface grinder if needed. If the header flange is warped from use, it may be better to have the flange ground flat because the header flange warped as a result of stress relief and it will likely try to warp again the next time it is heated if it is just pressed back to being flat.
Last edited by tesprit; 12-30-2008 at 11:24 AM.