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  #25  
Old 02-03-2016, 09:25 PM
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Re: How common are the broken manifold bolts?

Yes, 90grand over there is me. I joined that one when I had my old 90 Grand Waggie. I gave that to one of my sons and he still beats it around town. Good idea to contact Nick. IMO, the more research on this stuff the better.

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  #26  
Old 02-04-2016, 08:30 AM
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Originally Posted by hound View Post
Been following this on the other forum. I am Sneaky2Toes over there, I assume you are 90grandoneer?

I am going to post in the other thread and ask Nick, the only person known to have the AR 5.7L Headers, and see if he can do the startup procedure to check if he would pass an emissions test.

From everything I can gather about Utah emissions check, it is only an OBDII check. If Nick can verify that everything checks out, I will feel a lot more comfortable about proceeding with the header install this summer.
Good luck he seems to have disappeared form here.
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Old 02-04-2016, 08:31 AM
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Originally Posted by jeepgcoman View Post
Well, I finished (actually my son and I) doing the header maintenance job and, while at it, I also did a brake inspection, caliper slide pin lube and brake fluid flush. The header caper ended up being a giant PITA, which was not really a surprise.

We started by just R and R'ing the flange gaskets, since that was the problem last time I had exhaust leaks. This time, however, when we started it up after the change, it sounded almost the same as it did before we changed the gaskets...WTF? We then did a smoke test of the whole exhaust system and found a huge crack and hole in the No. 2 (front passenger side) primary tube right between where the tube passed the No. 4 and 6 cylinders.....of course the hardest place to get to. We then decided to remove that header for a second time, and had to cut part of the "Y" pipe off to get it out of the vehicle. I got the header welded up (turned out to be about a half dozen cracks in different parts of the header, mostly all minor. After fixing everything, we put it back on and it is now quieter than it's been in quite some time.

I am sure this will not be the last time for this, but at least, this time, the header bolts aren't going to break or come loose again, so no more replacing flange gaskets. I guess from now on it'll be crack repair instead. The headers are now 5 years old, so if I can get another 3 years or so out of them, I'll be happy. Then I'll probably have to figure out what to do for replacements. Here's a few pix of the cracks and work in progress.
Speaking of which I need to look at mine. Gotta check bolts to see if they have loosened up. In the 30k some mines with em on I've only had to tighten em up once but I ain't taking chances
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  #28  
Old 02-04-2016, 10:15 AM
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Re: How common are the broken manifold bolts?

I hear you, Jeff. Most of my loose header problems have been self inflicted. The first time I had to replace the gaskets I had neglected to re-tighten them after the initial install. It had been a couple years and I was on a 2000 mile trip when the flange gasket at the No. 1 cylinder blew. I was only about 1100 miles into the trip and couldn't find anyone willing to tackle the job. Had to drive it ~900 miles that way. The leak (see pix) cost my about 2 mpg over that part of the trip.

I will say that the Nord Lock wedge washers are for sure the answer. There is no way they will come loose. Any further "leak" problems I'll ever have will be more header cracks.
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  #29  
Old 02-04-2016, 10:16 AM
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Originally Posted by jeepgcoman View Post
I hear you, Jeff. Most of my loose header problems have been self inflicted. The first time I had to replace the gaskets I had neglected to re-tighten them after the initial install. It had been a couple years and I was on a 2000 mile trip when the flange gasket at the No. 1 cylinder blew. I was only about 1100 miles into the trip and couldn't find anyone willing to tackle the job. Had to drive it ~900 miles that way. The leak (see pix) cost my about 2 mpg over that part of the trip.

I will say that the Nord Lock wedge washers are for sure the answer. There is no way they will come loose. Any further "leak" problems I'll ever have will be more header cracks.
Maybe I'd I get some good weather this weekend I'll look at mine
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