dtom4 Posted December 3, 2006 Share Posted December 3, 2006 Just picked up a 97 Pathfinder SE in mint shape with only 39K. Needed an exhaust so I picked up a Bosal to install. After hours under the car and lots of swearing I finally got the old system off. I removed the intermediate pipes from the front pipes by breaking the nuts off with a chiesel. Anyway now that I have everything off I can't get the 2 studs off each of the front pipes. I've tried soaking it in PB Blaster, heating it with a torch, and have been banging away at it with metal mallet and none of them will budge. Are they threaded into the front pipe? I hope not and can't see why they would be. It would also make it almost impossible to get off since its rusted in place and there's really no head to grip to turn it. I'd just leave it and use new nuts but I mutilated the treads chiseling the the nuts off. My gut feeling is I have to keep hitting them, maybe with a bigger hammer and they will eventually come off. Any insight would be appreciated. Dam I hate exhaust work Dave Newly accquired 97 Pathfinder SE Runs great other than exhaust Link to comment Share on other sites More sharing options...
nissandoms47 Posted December 3, 2006 Share Posted December 3, 2006 they are welded on. all of the studs from the downpipe back are. your talking about the stud bolt itself and not the nut correct? a picture would help greatly Link to comment Share on other sites More sharing options...
dtom4 Posted December 3, 2006 Author Share Posted December 3, 2006 Crap, just what I didn't want to hear. Yes its the stud bolts on the 2 front downpipes that connects to the cat. It goes through the front and intermediate pipe flange and points front to rear. I assumed you could just punch them out with the nuts removed. Now it looks like I may have to bring it to a shop or welder. Dave Link to comment Share on other sites More sharing options...
88pathoffroad Posted December 3, 2006 Share Posted December 3, 2006 Not having a pic of the aforementioned setup in front of me doesn't help, but could you drill the old ones out, re-tap and install studs? Individual taps are pretty affordable and studs are too. Link to comment Share on other sites More sharing options...
sammyb33 Posted December 5, 2006 Share Posted December 5, 2006 Not having a pic of the aforementioned setup in front of me doesn't help, but could you drill the old ones out, re-tap and install studs? Individual taps are pretty affordable and studs are too. very true. i just had to do this on the manifold downpipe of my honda accord...drill um out and re tap them!! Link to comment Share on other sites More sharing options...
dtom4 Posted December 6, 2006 Author Share Posted December 6, 2006 very true. i just had to do this on the manifold downpipe of my honda accord...drill um out and re tap them!! Thanks for the suggestion. Will try and get a couple of pics taken tomorrow. Its not worth the trouble to drill them out and they don't need to be tapped. I just need to get them off and replace it with a nut and bolt. I'm thinking of either grinding down the stud bolt head around the edge where it would be welded to the flange or just reusing it and having someone tac weld a nut to it with the new intermediate pipe on. I'm leaning toward the latter. Dave Link to comment Share on other sites More sharing options...
sammyb33 Posted December 6, 2006 Share Posted December 6, 2006 sounds like it should work...but drilling them out really wasnt that bad at all. either way, good luck man! (i hate exhaust work... :() Link to comment Share on other sites More sharing options...
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