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Old 04-05-2011, 01:39 PM   #1
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Leaking exhaust manifold

What is the best way to fix the manifold so I don't have to replace it every year or so? I have seen the fix it manifolds with the expansion joints and I am wondering if this fixes the problem or not? I have also heard that the newer 2000 and up exhaust manifolds do not leak either and I am wondering which one is the better fix for the problem? The exhaust tick is really getting on my nerves and I want it fixed so it doesn't come back.

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Old 04-05-2011, 02:03 PM   #2
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I can tell you that 2000 and newer manifolds do leak. My 01 manifold leaks and it drives me nuts. I would like to know how to fix it permanently as well.

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Old 04-05-2011, 02:06 PM   #3
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Amen to that. My '03 ticks like crazy and it's killing me.
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Old 04-05-2011, 02:10 PM   #4
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I've seen this on alot of threads. I read that the header with the expansion is " The Fix". Not sure if it is, but couldnt hurt. Thats the one I replaced mine with. Just under 6 months and still going good. Not a bad job to replace. Bought my replacement header on Ebay for $115.00 if I remember.
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Old 04-05-2011, 02:23 PM   #5
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Quote:
Originally Posted by Geno View Post
I've seen this on alot of threads. I read that the header with the expansion is " The Fix". Not sure if it is, but couldnt hurt. Thats the one I replaced mine with. Just under 6 months and still going good. Not a bad job to replace. Bought my replacement header on Ebay for $115.00 if I remember.
Is this the whole manifold? Or just the gasket itself?
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Old 04-05-2011, 02:27 PM   #6
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If your manifold is cracked you need to replace the whole thing.
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Old 04-05-2011, 02:30 PM   #7
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We are talking about the gasket right? not the whole Manifold.
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Old 04-05-2011, 02:33 PM   #8
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Mine ticks really bad as well but I can't find a leak! I do not see any cracks or leaks at the gasket, and I have also replaced the bolts at the bottom where it connects to the rest of the exhaust to make sure that seal was tight.
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Old 04-05-2011, 02:59 PM   #9
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Is this the whole manifold? Or just the gasket itself?
It was the whole exhaust manifold! Header actually. Complete with gasket and bolts. No kidding. Do an Ebay search for Jeep 4.0l header and shop away. The outfit I bought mine from was in california.
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Old 04-05-2011, 03:07 PM   #10
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I e-bay'd myself a performance header 2 years ago. still going strong. no leaks or anything.
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Old 04-05-2011, 03:19 PM   #11
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Jeep 4.0L Exhaust Manifold Header Stainless Steel - eBay (item 180612023296 end time Apr-12-11 17:22:01 PDT)

Is this the one?

Except I have an 01 so its not the correct one for me. But, this is the expansion one right?
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Old 04-05-2011, 04:16 PM   #12
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Is there a way to check to make sure the header is cracked, rather than a bad gasket?
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Old 04-05-2011, 05:26 PM   #13
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Quote:
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Jeep 4.0L Exhaust Manifold Header Stainless Steel - eBay (item 180612023296 end time Apr-12-11 17:22:01 PDT)

Is this the one?

Except I have an 01 so its not the correct one for me. But, this is the expansion one right?
Thats the one, just different seller.
As far as finding out where its leaking, just got to get in there. My header cracked right where the two tubes went into one. I hear its a common place.
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Old 04-05-2011, 05:29 PM   #14
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My 06 LJ manifold leaked it set of the O2 sensors to trip the check engine light. Lucky it was cover under the past owners warranty.
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Old 04-05-2011, 08:22 PM   #15
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i welded my tubes together ,no more problem
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Old 04-05-2011, 08:40 PM   #16
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The factory header/manifold likes to crack where the two lower tubes come together just before the end. You need to look in the area when its hot, the crack will be more appearant, as it tend to close up as it cools. I've welded my for the third time and now its time to replace for good. Seems that after the header has cracked it will never end. I have done a few after market headers and they seem to hold up great. Pretty dam pricey though. I like the Banks.
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Old 04-05-2011, 09:44 PM   #17
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What if I sprayed hot soapy water on it while it was runnung?
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Old 04-06-2011, 12:53 AM   #18
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Probably be a little hard to see since the water would steam from the heat...
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Old 04-06-2011, 04:40 AM   #19
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Mines also cracked where the pipes come together. I order this one last Wednesday and it was on my doorstep yesterday. Couldn't believe how fast it got here, I'm in Canada and everything seems to take forever. It seems like a very good product for the price especially after pricing the stock one at the stealership for $690!! I'm hopefully gonna be putting it in this weekend so I'll try and take some pictures as I go.
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I live in philly and there is no way I'm leaving my top down and doors off anywhere around here! Maybe for small trips where I'm not moving far from my jeep I can't watch it with my eyes. Can't trust people no matter where you live! Unless you live in Canada lol
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Old 04-06-2011, 10:40 AM   #20
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What if I sprayed hot soapy water on it while it was runnung?
I wouldnt suggest that. Hot or cold water on a running engine might not turn out really good. If its the gasket or a cracked header, either way you'll be taking the header off. For $120.00 , with a gasket, not a bad idea to have on hand and just go for it. Tear it down and you should find the leak.
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Old 04-06-2011, 10:44 AM   #21
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I meant right when I started the engine while it was cool. I have a gasket but I want to be sure the ticking is my exhaust.
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Old 04-06-2011, 10:51 AM   #22
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the crack should stick out like a sore thumb it looks like a black hair is on it . mine had so many cracks it looked like a hot marble dropped in cold water . i have the one with the bellows and i re-welded around the collector and then up the tubes and welded the tubes together . i like what the one guy said about the Stainless steel header ,much stronger metal that will be my next header
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Old 04-06-2011, 10:57 AM   #23
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Still not sure the water trick is the way to go. Dont want to tell you your wrong or anything, just I never tried water. Let me ask you this, does your ticking stay constant? Is it louder when the Jeep is cold then go away a little when it warms up or the opposite?
Mine was bad when cold then the header would warm up and the pipes would expand with the heat and the leak was not as bad. If its constant, it could be the gasket. Possibly blown out. My buddys YJ just blew the gasket out on the back cylinder. His leak was constant. Get a real bright light like a LED maglight, and look down at the header where the two pipes collect into one and see if you can find a crack. Next, look all around the head. Climb underneath the Jeep and look at the head and see if there is any black where the header meets the head, just make sure not to do it while the engine is running.
Just a few ideas.
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Old 04-06-2011, 03:54 PM   #24
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The only way I think you'd be able to tell with the water is if your engine was cool and you sprayed it all down and started it then watched for the leak before the exhaust got real hot.
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I live in philly and there is no way I'm leaving my top down and doors off anywhere around here! Maybe for small trips where I'm not moving far from my jeep I can't watch it with my eyes. Can't trust people no matter where you live! Unless you live in Canada lol
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Old 04-06-2011, 05:50 PM   #25
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The only way I think you'd be able to tell with the water is if your engine was cool and you sprayed it all down and started it then watched for the leak before the exhaust got real hot.
Thats what im thinking! I can't really get a good look at the header without taking off the intake manifold. I don't want to take off the manifold if the ticking is not an exhaust issue. There just has to be a way to check if it is exhaust or not.
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Old 04-06-2011, 06:52 PM   #26
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I bet with a scanner and the right instructions you should be able to monitor the short and long term fuel trims

A quick google search came up with this
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Adjustments to LTFT by the PCM are normal. However, fuel trim data may point at a problem elsewhere, so fuel trim data can be very useful in diagnosing engine problems. When LTFT is adding to injector duration, it is compensating for a lean condition. That condition could be caused by an air leak, weak fuel pressure, an exhaust leak in the manifold upstream of the HO2S...
CarTech, Inc.: Browsing Fuel Trim

I'll be analyzing my STFT and LTFT to see if I actually have a vacuum leak soon, somewhat related
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Old 04-06-2011, 07:51 PM   #27
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If it has a crack, there will be a noticeable line or crack where the leak is. Mine has more than one and the only real fix is a new manifold. I've had mine welded and it was only temporary.
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Old 04-06-2011, 08:03 PM   #28
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Yes but I wont be able to look for a crack very well without removing the manifold. Im trying to avoid removing the intake manifold if possible. So there is no way to check for a crack without tearing it down? How do you check for a gasket leak vs. a crack?
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Old 04-06-2011, 08:08 PM   #29
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Both of my cracks we're very visible without removing the manifold. I had more than a small tick... if you look where each pipe comes together you should see a crack if one is there.
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Old 04-06-2011, 08:11 PM   #30
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I cant see where the pipes come together with the manifold in the way. I can see very little, but do not see any cracks. I have an 01 Tj so it has a two piece header with the precats or whatever they are, I dont know if that makes a difference.

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