roadmaster_56 Posted March 10, 2022 Share Posted March 10, 2022 The manifold on my 50 Buick 263 has developed a crack just under the carb was is causing a lean out condition. (see below - photo from web, not my actual manifold) Just wondering if this is a "somewhat" common weakness of the manifold. I'm waiting for the JB Weld to set, to see if it seals... Anyone else run across this issue? Link to comment Share on other sites More sharing options...
Bill Stoneberg Posted March 10, 2022 Share Posted March 10, 2022 Yes, my 50 Super had the same issue. Link to comment Share on other sites More sharing options...
roadmaster_56 Posted March 10, 2022 Author Share Posted March 10, 2022 Bill: JB Weld, regular weld or replacement? Link to comment Share on other sites More sharing options...
Bill Stoneberg Posted March 10, 2022 Share Posted March 10, 2022 I replaced it. Welding cast iron is not something I wanted to try. Link to comment Share on other sites More sharing options...
roadmaster_56 Posted March 10, 2022 Author Share Posted March 10, 2022 Just a follow up on the intake manifold crack. I had been experiencing an intermittent miss at idle only.. went away off idle and with acceleration - as evidenced by a "putt-putt" at the tail pipe. Must have caused a lean condition at low rpm. It's been greatly reduced/almost eliminated since the JB Weld....so for others who have a intermittent "putt-putt miss" @ idle, check for a tiny intake manifold leak.... 3 Link to comment Share on other sites More sharing options...
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