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Message: <blockquote data-quote="shovel" data-source="post: 1588560" data-attributes="member: 29855">Isn't the bottom end of the EGR tube a flare fitting?    I no longer have a V6 SN95 so I can't go look on mine but I think it's a flare which means it's compression fit, the tube smashes against a 45 degree cone and the nut just pinches it down to that.    In other words the seal isn't even at the nut.   Ensuring it's clean and giving the nut portion (threads and rear of the flare) a little grease might be all that needs.  There  really shouldn't be enough oxygen getting in through there under any circumstances to cause substantial rpm spikes.</blockquote>