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Old 02-18-2010, 09:27 PM   #1
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Changing header gasket...

Just found out I have a header leak on my 03 4.0L and I really don't have the money to bring it into a shop and get repaired. I was just wondering how difficult it would be to do and if there is anything specific I should look out for. I looked at it before and realized its going to be a huge pain because the intake and exhaust manifold are on the same side of the engine. Any input would be awsome. Thanks guys

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Old 02-18-2010, 09:34 PM   #2
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I used this and found it VERY helpful. No problems whatsoever. Did it in 4 hours start to finish.

[Repair] Exhaust Manifold Replacement Guide

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Old 02-22-2010, 09:05 PM   #3
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Thanks
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Old 02-23-2010, 03:05 AM   #4
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Two words... Haynes Manual ... i did a head gasket replacement this fall on my buddies Ranger and the Haynes Manual was a big help
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Old 02-23-2010, 08:07 AM   #5
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Quote:
Originally Posted by wrpracing13 View Post
Just found out I have a header leak on my 03 4.0L and I really don't have the money to bring it into a shop and get repaired. I was just wondering how difficult it would be to do and if there is anything specific I should look out for. I looked at it before and realized its going to be a huge pain because the intake and exhaust manifold are on the same side of the engine. Any input would be awsome. Thanks guys
Are you sure it is the gasket? the 4.0 headers break all the time so it might not be just the gasket, check it good. I would hate for you to get your motor apart and realize you need a part. I replaced mine a couple years ago and now its broken again.
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Old 02-23-2010, 09:28 AM   #6
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yea definitely make sure the header isn't cracked. I just replaced mine two weeks ago since it was split in a few places. Replacing the gasket or even replacing the entire manifold is not a complicated job. Basically you take a few things off the intake, remove the intake, remove the exhaust manifold and put it back together... the only pain in the A$$ is getting access to the manifold bolts. It took me 30 min to get the toughest bolt out because it was such an awkward position... good luck!
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Old 02-23-2010, 10:10 AM   #7
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should i rhino line the outside of my 98 wrangler

i have a lot of scratches on my jeep and was thinking o rhino line the outside does anybody have an opinion
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Old 02-23-2010, 07:22 PM   #8
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i have a lot of scratches on my jeep and was thinking o rhino line the outside does anybody have an opinion
I'm curious as to why you'd post this in someone else's thread on a completely unrelated topic? You'll have better luck getting answers if you start your own thread. At any rate, welcome to the forum!


To the original poster, I used the same write-up linked above to do my exhaust manifold. It was very helpful. The only thing I did differently was to NOT remove the throttle body because it wasn't necessary to remove it. It helps to label your connections so there's no doubt as to where they go. It took me a hair over 4 hours to complete. The hardest part was getting to the bolts on the underside of the manifold.
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Old 02-23-2010, 07:57 PM   #9
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as most people stated above...make sure ur exhaust manifold isnt cracked before tearing everything apart. i had the same issue and i had a really bad crack at the collector. my buddies and i actually used seafoam to track the leak down lol
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Old 02-24-2010, 08:15 PM   #10
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well i brought my jeep in to get the axle seals replaced and my shifter repositioned and when i picked it up he told me i had an header leak. the guy builds race cars for a living so i just took his word for it. my friend had a cracked manifold on his ZJ, and my car doesnt sound nearly as loud as that which is leading me to believe its only a leak. thanks guys for the help

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