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exhaust manifold


 
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JeepinNH
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Joined: 13 Sep 2005
Location: New Hampshire

PostPosted: Sun Sep 17, 2006 7:42 am    Post subject: exhaust manifold Reply with quote

Hello, it seems I have a small crack on my exhaust manifold where the 2 sections meet. It is parallel with the weld. Is this common? I did a quick search with no hits. I'm thinking some sort of high temp putty to fill it in. It looks weldable but a PIA to remove. Thoughts?
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Mike

Present: 99 Cherokee
Past: 86, 87 Cherokee; 94 Grand Cherokee
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88WOWJ
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Joined: 12 Aug 2006
Location: Hinesville Ga

PostPosted: Sun Sep 17, 2006 11:45 am    Post subject: Exhaust Leak Reply with quote

Yes this is problem but very little. My 1988 exhaust manifold was cracked
in numerous places but was not leaking. It had 225,000 miles when the engine was replaced. The dealer wants way to much money for repalcement, $500.00 plus. I would go headers before paying that much.
Check out this site maybe it will help http://www.carpartstoyourdoor.com/jeepexhaust3.htm

And no you cant weld it as it is stress cracked and the metal will just crack again.
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1988 Wagoneer Limited XJ Tellico Tested
Rocklizards panels, Tomken rear bumper and front Tow brackets, Rocket air intake, 2 inch lift,
30x950x15, 1991 coolant system with electric fans, 8,000 mile marker winch
1991 Cherokee Limited
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JeepinNH
Member


Joined: 13 Sep 2005
Location: New Hampshire

PostPosted: Wed Sep 20, 2006 6:44 am    Post subject: manifold Reply with quote

Wow, that's a cheap price. Has anyone tried one? Is it a quality unit?
Thnaks.
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Mike

Present: 99 Cherokee
Past: 86, 87 Cherokee; 94 Grand Cherokee
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tomynoks
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Joined: 11 Apr 2006
Location: Mesa, AZ

PostPosted: Fri Sep 22, 2006 11:50 pm    Post subject: Reply with quote

Check EBay.. you can get that header for under $100.00 shipping included...BUT I would recommend you check this one out for about $135 w/ shipping:

http://www.autopn.com/store/pc/viewprd.asp?idProduct=20009

It's almost identical (I can't tell the difference) to Banks Header selling for hundreds more.

http://www.savannajones.com/Assets/Images/36419/36419-lg.jpg
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'99 XJ Sport
AirAid Intake
PowerAid Throttle body spacer
RE6030 3.5"
1" T-case drop
31x10.5x15 BFG AT KO's
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gtouimet
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Joined: 07 Feb 2006
Location: San Diego, Ca.

PostPosted: Mon Sep 25, 2006 9:24 am    Post subject: Reply with quote

You could check these out too.
http://www.quadratec.com/products/17604_102_07.htm
http://www.quadratec.com/products/17604_101_07.htm
http://www.quadratec.com/products/17604_100_07.htm
http://www.quadratec.com/products/17602_300_07.htm
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'91 XJ, 8" lift, 35x12.5x15 BFGs, 8.8, 4.56
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tomynoks
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Joined: 11 Apr 2006
Location: Mesa, AZ

PostPosted: Tue Sep 26, 2006 9:24 pm    Post subject: Reply with quote

The one I bought is EXACTLY the same as the ones from Quadratec, but for only $135.00 shipping included...... Quadratec ? $299.00
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'99 XJ Sport
AirAid Intake
PowerAid Throttle body spacer
RE6030 3.5"
1" T-case drop
31x10.5x15 BFG AT KO's
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JeepinNH
Member


Joined: 13 Sep 2005
Location: New Hampshire

PostPosted: Wed Sep 27, 2006 5:14 am    Post subject: manifolds Reply with quote

The Quadratecs are really nice to look at but you can hardly see the manifold so for the price why bother? Right now I have liquid steel on there and it seems to be holding up. I need it to pass inspection this month then I'll have time to figure out what to do next. Thanks.
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Mike

Present: 99 Cherokee
Past: 86, 87 Cherokee; 94 Grand Cherokee
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JeepinNH
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Joined: 13 Sep 2005
Location: New Hampshire

PostPosted: Tue Oct 03, 2006 1:54 pm    Post subject: manifold Reply with quote

Well, the liquid steel lasted about a week so I just ordered the one tomynoks listed. It looks like it's good quality and has better flow characteristics than the other one. We'll see. I watched the crack today, when the engine is cold it's open and as it warms up it closes (be nice... Wink ). I did some Googling and it seems alot of people are complaining about this issue.
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Mike

Present: 99 Cherokee
Past: 86, 87 Cherokee; 94 Grand Cherokee
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JeepinNH
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Joined: 13 Sep 2005
Location: New Hampshire

PostPosted: Sun Oct 15, 2006 10:38 am    Post subject: manifold replaced Reply with quote

Hello, I bought the manifold that tomynoks listed. Looks decent and was not too much of a pain to install. It took me 4 hours start to cleanup. I was amazed that all the fasteners came off without drama. The only issue I had was the down pipe near the firewall was hitting the intake. Because of this the intake would not seat properly. I removed some metal from the intake and flattened the pipe a little with a hammer. That was enough for it to fit perfectly. I haven't noticed any significant changes in sound or power, maybe a little smoother on the power. We'll see if fuel economy is better. Here is a link to some pictures of it. http://mysite.verizon.net/vzeqtxwy/
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Mike

Present: 99 Cherokee
Past: 86, 87 Cherokee; 94 Grand Cherokee
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TheBrat97
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Joined: 28 Jul 2006
Location: Dallas, TX

PostPosted: Sun Oct 15, 2006 1:47 pm    Post subject: Reply with quote

I'm sure we've all noticed this but how is an XJ manifold much different from a header? It has smooth flowing tubes like a header so I was just wondering.
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JeepinNH
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Joined: 13 Sep 2005
Location: New Hampshire

PostPosted: Tue Oct 17, 2006 6:01 am    Post subject: header Reply with quote

I'm not really sure of the difference between a header and a manifold. I always figured manifold is a cast iron type unit and header is tubular steel. If this is the case then the stock one would be a header. I think a header fits into the "manifold" classification but not the other way around. Either way the stock one sux Mr. Green
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Mike

Present: 99 Cherokee
Past: 86, 87 Cherokee; 94 Grand Cherokee
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TheBrat97
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Joined: 28 Jul 2006
Location: Dallas, TX

PostPosted: Tue Oct 17, 2006 9:36 am    Post subject: Reply with quote

The stock Jeep manifold is the first stock manifold I've ever seen that looks so much like a header.
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