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This is a NOS petcock going into a original factory 69 radiator. Maybe I should ask how did the factory do it back then. I do have both pipe dope and teflon tape in my toolbox, so no big deal. I just like keeping things as original as possible. Many thanks.


Doubt the factory had the worker applying tape or sealant on every valve they installed. Factory would have ordered valves with a sealant already applied to threads, if they used any at all. Typical of any production/assembly factory workings.