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Unread 01-24-2012, 10:19 PM   #1
havasu1
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Exhaust manifold.....hard to replace???

Well my driver side exhaust manifold cracked. Are they hard to replace. Or should I say, will the bolts snap? I don't think the manifold would be hard to replace, I just don't want to mess with broken bolts (a jeep staple for sure). Shop wants$350.00 to replace one side, seems like a lot of doe for a $100.00 worth of parts.

On a side note, are there exhaust manifold that I should buy and do it myself (besides the RIPP ones, very pricey as nice as they are).

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Unread 01-24-2012, 10:50 PM   #2
DrHolliday
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I would do it yourself, just soak the bolts in WD-40 or PB blaster over night. And have a ride available to take you to get spare bolts if one breaks. I'd think the manifold to exhaust pipe would have the best chance of snapping on you.

Don't use 12 pt sockets, only 6 pt so you don't risk rounding off the heads.
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Unread 01-25-2012, 05:04 AM   #3
jabsther
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I changed the ZJ I had before. Bolts came off with no problem. Used wire brush to get large rust off the studs/nuts and sprayed PB Blaster on it for a week.
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Unread 01-25-2012, 07:17 AM   #4
JemLT1YJ
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Some stuff ive found that works better then anything... Loctite freeze and release. You spray the bolt/nut for 5-10 seconds then let it sit for a little over a min and they come right off. Shock freezes the bolt/rust to crack it and let the penetrating oil into it. Very neat stuff. Using it on my bro in laws 97 f150, doin head gaskets. Been very useful never seen a vehicle so rusted and i work on a 90 xj, and 89 yj...

Edit: heres a link http://www.loctitefreezeandrelease.com/
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Unread 01-25-2012, 09:34 AM   #5
havasu1
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thanks for the input. I'll try that locktite product. Any headers you recommend? Are they all pretty much the same. Just go get some off Rockauto?
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Unread 01-25-2012, 09:44 AM   #6
Alaska-HWY JK
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Had mine replaced under warranty just before it ran out. One bolt broke and they couldn't get at it to drill and easy out so they had to pull the head. Top end gaskets were back ordered for a week. Long story short I'm glad I didn't do that one in the driveway. On a side note the Jeep runs a lot better now and on long road trips I'm getting the same mpg with 37's as I was when it was stock many years ago.
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Unread 01-25-2012, 10:04 AM   #7
Cirruslydakota
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^^^ Another vote for the loctite freeze penetrating oil. That stuff is easily the best stuff ive ever used.
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Unread 01-25-2012, 10:10 AM   #8
havasu1
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Is it worth going to the Gibson headers or just getting some stock ones
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Unread 01-25-2012, 12:19 PM   #9
Prot
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I would be worried that the stock replacement would crack like the original.
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Unread 01-25-2012, 12:35 PM   #10
utlax18
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Out curiosity, how did you find out your exhaust manifold was cracked? I have heard that you can hear a tapping sound. My JK as 55K miles and am smelling a little exhaust in the cabin when I fire it up, but not when I am driving down the road. I don'thear a tapping sound, but still wondering if I have acrack somewhere if I am smelling a bit of exhaust.

Cheers!
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Unread 01-25-2012, 03:51 PM   #11
spookylynx
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If your pulling them off anyway, you might as well upgrade to a nice headder. I think I'm going to do mine in the spring, with RIPP Mods long tube headder. Bit pricey but a really sweet setup.
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Unread 01-25-2012, 09:11 PM   #12
havasu1
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Quote:
Originally Posted by spookylynx View Post
If your pulling them off anyway, you might as well upgrade to a nice headder. I think I'm going to do mine in the spring, with RIPP Mods long tube headder. Bit pricey but a really sweet setup.

yeah, they are pricey. That's whats keeping me away. I have other mods I want to do first such as upgrade my lift. I'll see how this one goes. Stock replacements are pretty cheap. $90 bucks or so.
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Unread 01-25-2012, 09:13 PM   #13
havasu1
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Quote:
Originally Posted by utlax18 View Post
Out curiosity, how did you find out your exhaust manifold was cracked? I have heard that you can hear a tapping sound. My JK as 55K miles and am smelling a little exhaust in the cabin when I fire it up, but not when I am driving down the road. I don'thear a tapping sound, but still wondering if I have acrack somewhere if I am smelling a bit of exhaust.

Cheers!

I could actually see the crack just below the heat shield. What happens over time is you get a ticking sound, almost sounds like a lifter is clicking. Anyway, it happens when you start it up cold, it makes a ticking noise that in my case, would go away when at temp. But it is getting louder as I think the crack is getting worse.
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Unread 01-27-2012, 03:56 PM   #14
spookylynx
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Quote:
Originally Posted by havasu1 View Post
yeah, they are pricey. That's whats keeping me away. I have other mods I want to do first such as upgrade my lift. I'll see how this one goes. Stock replacements are pretty cheap. $90 bucks or so.
I totally understand prioritizing mods, but I think Gibson or Rustys make a nice short tube hedder that is'nt too expensive, but if I had to choose between suspension and hedders, I'd choose suspension also.
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Unread 01-27-2012, 04:11 PM   #15
GPV
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Check this out to aid in removing rusty bolts:

http://grassrootsmotorsports.com/for...t/13650/page1/
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