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Do I Still Need To Use Ultra Copper


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Found out that my drivers side header is leaking..I swear I torqued it to specs (18 ft.lb).Do I still need to use some kind of sealant on there like ultra copper or high temp sensor safe silicone? Im using felpro gasket

 

 

You shouldn't. Try torquing it again - it is not uncommon for bolts to loosen.

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ok ...the problem is the bolt that I used is bottoming out behind the thread on the engine block....I went and got 8X25 or I couldve used the thick washers that came with the factory stud and nut on the 8X30 bolt that I already have which I think I shouldve done to begin with but I just remembered those washer on my way home from fasteners...now theyre all torqued to specs and no leak..Ill re torque it again in a few days

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