Leif,Pressure relief holes are not needed in your engine mount unless you plan on having it “normalized” after welding to relieve stresses.I wanted to do that after TIG welding but forgot to vent each tube beforehand.The temperatures used to normalize or stress relieve the mount would cause them to burst if not vented.Anyway no issues with cracks in spite of omitting that process.Your decision.CheersChris Gardiner
Sent from Yahoo Mail for iPad On Monday, January 14, 2019, 2:33 PM, Leif G Alstadsæter via KRnet <krnet@list.krnet.org> wrote: Hi I just welding my new mounth. What Know many drill a hole in the tube, for pressure on high altitude. I need some advice.. is this nessessary Regard Leif Norway Få Outlook for iOS<https://aka.ms/o0ukef> _______________________________________________ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org _______________________________________________ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org
