Gold Lifetime Member
Join Date: Jan 2005
Location: 2 Dog Town in West Texas
Re: Header Leak????
To be sure, you might put new gaskets with a smear of hi temp rtv on the surfaces if you suspect sealing surface or collector gasket leaks. You did not say long or short tubes.
Sometime a crack develops in the collector cone area, where all tubes come together. Usually a gasket leak will leave a tell-tell sign like a black carbon streak between gasket and flange.
Might tell us about your cam and valve train. Yes , bad plug wires could cause a spark jump also, sounding like a slight tap.
TC # 349
Zdld17:69 Z/RS,306, NOR141111, 9N554XXX, 12A, X3G, 59/59,723, AFR 195,CCC282/290HR, TKO 600, BU1122B1E Owner since Dec 1968
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