Tom_Tams Posted September 2, 2012 Share Posted September 2, 2012 I have some questions regarding the plugging of heat risers. My heat riser valve is non functioning as the butterfly has been removed. The base of the carb becomes very warm as a result. My questions are, has anyone blocked the exhaust gasses from entering the heat chamber of the intake manifold? If so, how was it done and what was the result? Link to comment Share on other sites More sharing options...
FLYER15015 Posted September 2, 2012 Share Posted September 2, 2012 (edited) I too had one that did not function, and I do not drive the "Baby" , a 1940 series 90L Buick, when the temp is under 40F.When I had the manifold off last year, I fabricated a new plate from a piece of 10 gage and welded it to the shaft in the closed (all gases to the exhaust pipe) position. Drove all summer long with out a problem.Just my $ .02Mike in Colorado Edited September 2, 2012 by FLYER15015 (see edit history) Link to comment Share on other sites More sharing options...
Tom_Tams Posted September 3, 2012 Author Share Posted September 3, 2012 Thanks, 10 gauge is pretty stiff to handle, good for you, I think I would have chickened out with 16. Did you notice any difference in performance or heating? Link to comment Share on other sites More sharing options...
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