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Unread 08-24-2013, 10:49 AM   #1
billzcat1
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Parts List for Exhaust Manifold Job on 4.7 v8

Hi Fellas -

My WJ picked yesterday to crack an exhaust bolt/stud and create the typical 4.7 massive exhaust leak. So I'm gearing up to do the job, going OEM on the parts and replacing all the hardware. I have the OEM parts catalogs but they are not real helpful in telling me how many and what kind of fasteners I need. And of course I can't see anything without fully disassembling the Jeep and I can't have it torn down for a week waiting for parts.

I've figured out I need...
53034030AC - manifold gasket
53034029AD - manifold gasket
6506012AA x 4 - hex bolts from downpipe to manifold

Where I'm confused is how many bolts and how many studs hold the manifolds to the heads. I don't want to just order everything and see how it turns out. At $1-3/pc and 20 pieces needed, that adds up quickly.

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Unread 08-24-2013, 06:25 PM   #2
coopdc78
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Idk if it helps. But there are 8 per side and they had all of mine in stock at the dealer for I believe 2.50 a piece
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Unread 08-24-2013, 09:54 PM   #3
billzcat1
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Were they all the same? If so, were they bolts or studs?
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Unread 08-25-2013, 05:50 AM   #4
coopdc78
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Oh yeah. Forgot about that. I believe they were all studs but the ones that hold on the heat shield have more exposed thread yo hold the shield on
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Unread 08-25-2013, 10:03 PM   #5
billzcat1
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I think I've got it figured out. Been reading lots of threads...finally grew a brain and dug up the service manual.

Final answer...
The leading and trailing cylinders on each head have studs and the middle two cylinders have bolts.
I'm going to update with a complete list of hardware needed for the job...
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Unread 08-25-2013, 10:09 PM   #6
billzcat1
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A list...

53034030AC - manifold gasket
53034029AD - manifold gasket
6505257AA x 4 - studs for manifold-to-head
6504340 x 8 - hex bolts for manifold-to-head
6504331 x 4 - studs for manifold-to-head
6505316AA x8 - nut
6506012AA x 4 - hex bolts from downpipe to manifold

In case you're wondering why I'm replacing EVERYTHING... I don't want to do this job twice. I know from past experience that a lot of the fasteners on exhausts and manifolds will wind up getting damaged during removal. Rather than getting halfway done and getting stuck due to broken/missing fasteners, I'll just be expecting to replace it all.
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Unread 08-26-2013, 06:59 AM   #7
webby88
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Quote:
Originally Posted by billzcat1 View Post
A list...

53034030AC - manifold gasket
53034029AD - manifold gasket
6505257AA x 4 - studs for manifold-to-head
6504340 x 8 - hex bolts for manifold-to-head
6504331 x 4 - studs for manifold-to-head
6505316AA x8 - nut
6506012AA x 4 - hex bolts from downpipe to manifold

In case you're wondering why I'm replacing EVERYTHING... I don't want to do this job twice. I know from past experience that a lot of the fasteners on exhausts and manifolds will wind up getting damaged during removal. Rather than getting halfway done and getting stuck due to broken/missing fasteners, I'll just be expecting to replace it all.
I just did this job about a month ago, called a random dealership and ordered all the parts over the phone, came out to $35~ after shipping for all new bolts and new gasket.

I see you got the list together so you don't need mine.

Ill just say this, I did only the drivers side in about 1.5 hrs without air tools nor lift, every bolt came apart surprisingly easy and reassembled nicely.

Good luck!
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Unread 08-26-2013, 10:19 AM   #8
billzcat1
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Yeah, the total for both sides came to $74 + shipping from MoparOnlineParts.com. I ordered everything down to the nuts - which surprisingly enough were the most expensive part. I'm not unhappy with that price for all OEM parts. I might be a little unhappy with the job though. I'm going to do both sides just to be sure I don't have to do it again.
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Unread 08-26-2013, 12:01 PM   #9
Galaxie500LTD
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Nice looking list. I'm looking forward to hearing how it goes for you. You guys in the USA are lucky, up here it was $45 for just the nuts and bolts from the Y-Pipe to the manifolds (4 nuts, 4 bolts).

In your list, are the nuts for the Y-pipe in there? They have the flange attached to them. Is this them?: 6505316AA x8 - nut

I'm pretty sure my manifold(s) are leaking, the sound used to be a tap... but now it's more clacky sounding... I can't tell where it's coming from exactly. Does yours sound ticky?.... or clacky?
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Unread 08-26-2013, 01:14 PM   #10
billzcat1
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I did not see the nuts listed in the parts fiche and had assumed (falsely?) that the manifold was threaded to accept the bolts. Most everything I have worked with in the past has had studs in the manifold and then nuts on the downpipe so this seemed off. I'll look into it further when I get home.
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Unread 08-26-2013, 01:44 PM   #11
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According to my bill the part # is 06503231 at $6.35 each.

-It's good and bad that they're not attached I guess (no way to break the studs)... but if they bust off the tab on the nuts and start spinning it's pretty hard to remove them. I managed to get a set of mini-vice grips on the one that broke off the tab (flange). The studs (bolts) have a funny thread that bite into the nut so they can't vibrate loose once tightened.
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Unread 08-26-2013, 02:32 PM   #12
Double E
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I've never heard of the passenger side manifold studs snapping but your philosophy is thorough if not ambitious. Agree that the remaining stud will probably twist out by hand.

The downpipe nut is a bear... spray it ahead of time...
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Unread 08-26-2013, 03:22 PM   #13
Galaxie500LTD
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Quote:
Originally Posted by Double E View Post
I've never heard of the passenger side manifold studs snapping but your philosophy is thorough if not ambitious. Agree that the remaining stud will probably twist out by hand.

The downpipe nut is a bear... spray it ahead of time...
I was just guessing as to why Chrysler thought it was a good idea to not have permanent studs attached to the manifold to attach the Y-pipe (or downpipe?... I think we're talking about the same thing)... I really don't know why they did it that way

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Unread 08-27-2013, 11:24 PM   #14
billzcat1
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Quote:
Originally Posted by Galaxie500LTD View Post
I was just guessing as to why Chrysler thought it was a good idea to not have permanent studs attached to the manifold to attach the Y-pipe (or downpipe?... I think we're talking about the same thing)... I really don't know why they did it that way

I know, right?

I searched the parts fiche for that nut p/n you posted. Came up as a flanged 10mm nut used to hold on the bracket for the shift cables. I haven't found any mention of the nuts for the downpipes. I have been pretty unimpressed with the OEM parts catalogues for the WJ thus far, the ETKA and PET catalogs were much better.

Looking "forward" to having this fixed though.
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Unread 08-30-2013, 09:03 AM   #15
Galaxie500LTD
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Here's what those little suckers look like:

http://www.jeep4x4center.com/mopar-p...t-6503231.html

I would like to have a set of nuts and bolts done up in stainless. I have to remove my Y-pipe again when I do my exhaust manifold gaskets. I have a good chance of getting them off this time as it's only been a year since I replaced my oil pan.... but I'm really not looking "forward" to it at all... it's one ugly mutha of a job.



I highly recommend getting one of these:

face-mask-590-1281464328.jpg

Take your time, be patient and Best of luck to you!
Let us know how it goes!
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