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Old 09-18-2012, 11:08 PM   #1
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Holy cow... No wonder

No wonder I had hardly any power and my jeep was getting horrible gas mileage. Mind you this header had the flex joints. First two pics kinda shows the crack right below the weld then an additional 3 cracks. Took different angled pics on some to show the severity. Either my jeep is a torque monster which I doubt or this header was definitely defective. Will install the new one tomorrow.
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Old 09-18-2012, 11:14 PM   #2
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Wow, that looks to be just a tad toward the bad side of the good-bad scale.

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Old 09-18-2012, 11:16 PM   #3
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It was like walking into a murder scene
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Old 09-19-2012, 10:25 AM   #4
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Old 09-19-2012, 07:46 PM   #5
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Is that the Ebay header with the front and rear flex joints? The one for around $80-90 that claims it is stainless steel? The reason I ask is because I have the Ebay header and the pictures look similar to mine. I have cracked two non-flex joint aftermarket headers before installing the one with flex joints and I was wondering if the joints made any difference. I was disappointed to see that the joints (in my header, maybe yours too) were in places that didn't really seem to help since most cracks are around the collectors.
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Old 09-19-2012, 08:03 PM   #6
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Quote:
Originally Posted by JeepinDave
No wonder I had hardly any power and my jeep was getting horrible gas mileage. Mind you this header had the flex joints. First two pics kinda shows the crack right below the weld then an additional 3 cracks. Took different angled pics on some to show the severity. Either my jeep is a torque monster which I doubt or this header was definitely defective. Will install the new one tomorrow.
I have a banks with no flex joint and it's about 5-6 years old and still going strong. I highly recommend it.
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Old 09-19-2012, 08:06 PM   #7
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Originally Posted by JeepinDave
No wonder I had hardly any power and my jeep was getting horrible gas mileage. Mind you this header had the flex joints. First two pics kinda shows the crack right below the weld then an additional 3 cracks. Took different angled pics on some to show the severity. Either my jeep is a torque monster which I doubt or this header was definitely defective. Will install the new one tomorrow.
Actually it should give you better power. What year is your jeep? I lost power and it was my cat clogging up exhaust gasses
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Old 09-19-2012, 08:55 PM   #8
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Originally Posted by Bob 97 TJ

Actually it should give you better power. What year is your jeep? I lost power and it was my cat clogging up exhaust gasses
Couldn't it mess with the o2 sensors? Or am I just imagining that as an issue?
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Old 09-20-2012, 07:34 AM   #9
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I have a 99. Idk where the cracked header came from. The PO bought it. I just replaced it with the 80 dollar eBay one though. I still have a loud clicking noise when the throttle is applied. Still trying to figure out if it's coming from the injectors or under the valve cover.
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Old 09-20-2012, 07:36 AM   #10
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And yes a cracked header can indeed mess with your o2 sensors. It will cool down the exhaust temp readings in turn making the jeep run rich.
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Old 09-20-2012, 07:00 PM   #11
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Originally Posted by JeepinDave View Post
I have a 99. Idk where the cracked header came from. The PO bought it. I just replaced it with the 80 dollar eBay one though. I still have a loud clicking noise when the throttle is applied. Still trying to figure out if it's coming from the injectors or under the valve cover.
WAIT. HOLD EVERYTHING. does this sound only happen when warmed up? and like a rattle only that happens when you apply the gas and put the engine under load?
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Old 09-20-2012, 08:10 PM   #12
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Lol yes that's exactly it. Sounds like an exhaust leak yet I can't find one anywhere. Almost sounds like if you slurp water through a straw.
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Old 09-20-2012, 09:43 PM   #13
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Why do jeeps crack exhaust pipes so often? Never heard of this being a common thing on any other car/truck..
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Old 09-20-2012, 09:45 PM   #14
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Lol yes that's exactly it. Sounds like an exhaust leak yet I can't find one anywhere. Almost sounds like if you slurp water through a straw.
I've got the same problem. Go to my forum I think it's named what's that sound? And listen to the vid. If that's the same one, at least we have two people trying to figure it out.
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Old 09-20-2012, 10:09 PM   #15
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Yessir, that is indeed the sound. I'm gonna put my jeep on the lift tomorrow. I'm convinced there has to be something with the exhaust causing this. Sounds like its definitely from the firewall area and not the cat or behind that. I'll let you know what I find.
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Old 09-20-2012, 10:17 PM   #16
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I believe mine might also have this problem though I haven't investigated it yet and it doesn't sound as bad, however, once warm, and engine under load I have a little clicking noise you can hear, sounds like a lifter stuck or something major engine wise, but I hear nothing when warm and idling or when I first start it, guessing I might have the same issue!
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Old 09-20-2012, 10:24 PM   #17
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Yessir, that is indeed the sound. I'm gonna put my jeep on the lift tomorrow. I'm convinced there has to be something with the exhaust causing this. Sounds like its definitely from the firewall area and not the cat or behind that. I'll let you know what I find.
Exactly. The sound is definitely coming from up front. And good luck finding it!
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Old 09-20-2012, 10:28 PM   #18
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Originally Posted by Turbostixxx
I believe mine might also have this problem though I haven't investigated it yet and it doesn't sound as bad, however, once warm, and engine under load I have a little clicking noise you can hear, sounds like a lifter stuck or something major engine wise, but I hear nothing when warm and idling or when I first start it, guessing I might have the same issue!
Sounds like it! I thought I was the only one with this problem... Then again it's a jeep.
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Old 09-20-2012, 10:29 PM   #19
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Why do jeeps crack exhaust pipes so often? Never heard of this being a common thing on any other car/truck..
My best guess is because jeeps run at 210 degrees which to my knowledge is considerably warmer than most engines.
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Old 09-20-2012, 10:35 PM   #20
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I've heard inline engines are hard on manifolds because they produce more torque than the same engine in a v configuration. Whether this is true or not I do not know.
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Old 09-20-2012, 10:37 PM   #21
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I've heard inline engines are hard on manifolds because they produce more torque than the same engine in a v configuration. Whether this is true or not I do not know.
Sounds believable. You only have one header vs a v6 that has a header/manifold on both sides, thus creating more heat with less surface area maybe?
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Old 09-20-2012, 10:44 PM   #22
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210 is pretty common for later smog motors. The six is pretty long and when it heats up it grows. The header would heat up at a higher temp due to no water cooling. What we did on the chevy's when they started cracking pipes was to Hack saw cut the header flange between each cylinder. This allowed the individual header pipe to move around as it warmed up and reduced the cracking. Might be worth a try.
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Old 09-20-2012, 10:55 PM   #23
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210 is pretty common for later smog motors. The six is pretty long and when it heats up it grows. The header would heat up at a higher temp due to no water cooling. What we did on the chevy's when they started cracking pipes was to Hack saw cut the header flange between each cylinder. This allowed the individual header pipe to move around as it warmed up and reduced the cracking. Might be worth a try.
What about header mummy wrap to dissipate heat faster? I did that with mine when I did my engine swap, after I wrapped it I painted it with header paint. I wasn't having problems before but I figured it wouldn't hurt.
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Old 09-20-2012, 11:03 PM   #24
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The ceramic tape holds in the heat. Some mfg's will void the warrenty of the header if they can tell you have used it.
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Old 09-20-2012, 11:04 PM   #25
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Old 09-20-2012, 11:07 PM   #26
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Quote:
Originally Posted by JeepinDave
I've heard inline engines are hard on manifolds because they produce more torque than the same engine in a v configuration. Whether this is true or not I do not know.
Produce more torque.. Wonder why that would be? I heard that to save space, it is easier to make a I6 with a longer stroke and narrower bore, to reduce the already long engines length. Maybe that's it?
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Old 09-20-2012, 11:11 PM   #27
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Originally Posted by DeepSouthJeeper

Produce more torque.. Wonder why that would be? I heard that to save space, it is easier to make a I6 with a longer stroke and narrower bore, to reduce the already long engines length. Maybe that's it?
Bring back the I6!
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Old 09-20-2012, 11:17 PM   #28
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Originally Posted by BigGreenMachine

Bring back the I6!
Hell, why just the I6? Bring back the TJ!
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Old 09-20-2012, 11:18 PM   #29
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Originally Posted by DeepSouthJeeper

Hell, why just the I6? Bring back the TJ!
Touché!
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Old 09-20-2012, 11:19 PM   #30
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Originally Posted by DeepSouthJeeper

Hell, why just the I6? Bring back the TJ!
Mines not i6 I'm running a 4cyl, which is also inline

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