MIBPreacher Posted May 22, 2006 Share Posted May 22, 2006 Last month, I had taken my Nissan into the Nissan customer care campaign where they give you a free 100pt inspection, I saw the mechanic shook his head as looked under my car, and the service manager scolded me for having 250,000 miles on my car. He told me that this car should have been kept in a garage with about 60,000 miles. I laughed at him and told him it was a daily dicer on the interstate commute. Anyways one of things they noted was an exhaust leak. I took it today to a muffler shop and he told me my exhaust was nice and still solid. Then he saw what was the problem. I am missing 2 studs on the middle of my exhaust manifold on the drivers side. I think someone was trying to take it off when they saw how hard it was going to be to get to it, decided not too. Anyways now I know I have an exhaust leak and where it is, but does anyone sell the studs new? I am not ready to do a turbo swap as thats alot of money, any ideas? Quote Link to comment Share on other sites More sharing options...
Zraced... Posted May 22, 2006 Share Posted May 22, 2006 Better check to see that the studs are not broken and that was why it was not touched. Are they studs or bolts? on your manifold? I haven't worked on the V6. Victoria British should sell the studs you need. Quote Link to comment Share on other sites More sharing options...
Twizted Posted May 22, 2006 Share Posted May 22, 2006 Nissan should have the studs. Most do not carry the replacement for your application however. They were upgraded on the pathfinder and have a star head on them to make it easier, they were also part of a recall and dealerships should still be carrying them. Talk to a knowledgeable technician/service advisor at the dealership. Quote Link to comment Share on other sites More sharing options...
MIBPreacher Posted May 22, 2006 Author Share Posted May 22, 2006 The exhaust mechanic was able to stick a punch out tool pretty far into the hole. I have a theory which made me think that the original stud and bolt combo probably seized together w/ a possibility of them stripping the nut which when they finally got it out, they decided not to put it back in. On the pathfinder, is it possible to upgrade to the newer bolts? My engine is currently the studded application. Thanks everyone. Quote Link to comment Share on other sites More sharing options...
Doug71zt Posted May 25, 2006 Share Posted May 25, 2006 The VG has a history of snapping off exhaust manifold studs due to the (poor) design of the manifold and the difference in expansion rates between aluminum and cast iron. The manifolds are also quite crack-prone, on the 300 as well as the Maxima. Have a good look at yours to make sure they are not cracked also. You may have gotten away easy, but usually the holes in the head are done in. A buddy of mine retired a 300 NA with over 550,000kms on it, he now drives a VG Maxima with only 350,000km. They are good drivetrains. Doug Quote Link to comment Share on other sites More sharing options...
MIBPreacher Posted May 25, 2006 Author Share Posted May 25, 2006 on the top bolt, I was able to stick a drill bit, all i had that size and short enought to maneuver, inside the hole, I hit what I think was a gasket edge and was able to wiggle past it pretty deep. My next step if it would stop raining is to use a mirror and a bright flash light to see if I can see inside the holes. The exhaust mechanic said that the leak could cause my slight loping feeling in my idle, anyone believe that? Every 4 or so seconds, I get a bump in the rpms and vac gauge. Quote Link to comment Share on other sites More sharing options...
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