Q: how to stop a leak from the flare bolt plugs on 1999 Honda Civic

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i had recently changed the radiator in my honda civic, and when i put the coolant lines back on. i had transmission fluid coming out of the top of the bolt when i start the car. i have taken the bolt plug out, cleaned it off and done about everything else i could think of, and it still leaks. any suggestions?
(1) Answer
(2) Comments
well, i'm talking about where the banjo nut comes out of the radiator i've tried the teflon tape, so if the threads are bad. does that basically mean i need a new transmission? would some gasket sealant possibly work? or what would you suggest?
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