Lol, after some more investigating, I do have that flange. It's right after the o2 that they patched in pipe. Couldn't see it til I got under it today when I did the muffler. It's a 99, picked up for dirt cheap, and I just want it to sound better. Starting the header tomorrow, soaking all bolts with PB Blaster overnight, and going from there. Did you use any RTV or gasket maker on the header gasket? Will try to get pics up tomorrow. Thanks for the help so far though.
Lol, after some more investigating, I do have that flange. It's right after the o2 that they patched in pipe. Couldn't see it til I got under it today when I did the muffler. It's a 99, picked up for dirt cheap, and I just want it to sound better. Starting the header tomorrow, soaking all bolts with PB Blaster overnight, and going from there. Did you use any RTV or gasket maker on the header gasket? Will try to get pics up tomorrow. Thanks for the help so far though.
I did not use ANY sealers other than the gaskets that came with the cat-back exhaust... plus the Walker lead gasket at the header collector. On the head I just used the big gasket that came with the header. Mind you I was not able to get ONE bolt in the head for the header... it is very tight to get to and the head of the nut is to big. It does not leak with this not tightened down. You will know which one it is when you get to it. I put the header in from the bottom... it sucked.
Mine is leaking bad around the bottom of 2&3. Neither nut wanted to go on very easily. Ordered some new gaskets, going to try them out because mine really doesn't fit too well, almost 1/8 off centered. Got the donut, that's in, and mine slid in from the top. Everything came apart really easy, kind of unbelievable. But definitely a PITA to get those bottom studs nutted up.
Mine is leaking bad around the bottom of 2&3. Neither nut wanted to go on very easily. Ordered some new gaskets, going to try them out because mine really doesn't fit too well, almost 1/8 off centered. Got the donut, that's in, and mine slid in from the top. Everything came apart really easy, kind of unbelievable. But definitely a PITA to get those bottom studs nutted up.
Well, got it in, leaks a bit around the collector flange, needs new bolts there. Had to replace the gasket with a felpro factory set. The bottom nut on #3 will not tighten down, but its not leaking there, so that's nice. This is definitely not a simple task to perform, but all in all went ok. Sounds killer!
Well, got it in, leaks a bit around the collector flange, needs new bolts there. Had to replace the gasket with a felpro factory set. The bottom nut on #3 will not tighten down, but its not leaking there, so that's nice. This is definitely not a simple task to perform, but all in all went ok. Sounds killer!
I use the same header on my 84 sentra with the ga16de swap and it was a nightmare. The pipe going under the engine rested on the oil pan and would have leaked on the head but got that fixed with a sawsall and a welder. I did 2 1/4 all the way back with a magnaflow muffler it sounds good and has some better throttle response and I Average 35-37 mpg now
After a week of driving on it, I have to say I am rather impressed with the feel now, seems like it opens up a little more, with better throttle response. The flange at the end of the header is tweaked a bit, so having trouble getting it bolted to the stock pipes, but I'm re-piping it tomorrow from the second O2 to the end. Doing 2 inch, to keep the sound and power good. Getting the gasket to seal up at the head was also a nightmare, was leaking a little bit until I tightened up the nuts again, now it seems ok. I'm running without a cat or EGR system, but with no emissions testing here I'll be ok.
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