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Cracked Exhaust Manifold.. (Read 2208 times)

1955CJ-5 Flatfender Master 2013 Sponsor Member 2016 Sponsor Member 2015 Sponsor Member Offline It wasn't always green.... Posts: 2338 Location: Boise, idaho Joined: 12/18/12 Gender:	Cracked Exhaust Manifold.. 05/29/13 at 23:31:35	Print Post
	I know, big surprise..And why didn't I see it before? Because it was February when I took it off and I was working outside... But, moving on.... Walcks sells a new replacement Made in America. Anyone have any experience with the Walck's replacement? It comes with a heat riser too....

	P1050413_001.JPG ( 181 KB \| 52 Downloads ) P1050414_001.JPG ( 150 KB \| 48 Downloads ) 1955 CJ-5, A friend for 55 years....1951 CJ-3A, a new addition. 1929 Model A Ford Closed Cab Pickup...
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CJPilot Flatfender Enthusiast Owner Member 2012 Offline Shade Tree Mechanic Posts: 177 Location: Central Mass Joined: 04/05/12 Gender:	Re: Cracked Exhaust Manifold.. Reply #1 - 05/30/13 at 00:33:18	Print Post
	I had to buy a new manifold as well. I don't remember if I bought it from Walck's or not, but it fit's and looks good. I'd be surprised if there is more than one manufacturer. Steve


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Ryan_M Flatfender Master Owner Member 2012 2016 Sponsor Member 2015 Sponsor Member Offline Posts: 1695 Location: Glenburn, ME Joined: 12/29/11 Gender:	Re: Cracked Exhaust Manifold.. Reply #2 - 05/30/13 at 11:37:21	Print Post
	I bought and installed one from Walck's about 600 or 700 miles ago. So far, so good.

	Current: '49 CJ3A '51 CJ3A '42 Willys MB-T '47 Bantam T3-C Previous: '46 2A '51 3A '52 3A '52 M38 '54 3B East Coast Willys Association
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1955CJ-5 Flatfender Master 2013 Sponsor Member 2016 Sponsor Member 2015 Sponsor Member Offline It wasn't always green.... Posts: 2338 Location: Boise, idaho Joined: 12/18/12 Gender:	Re: Cracked Exhaust Manifold.. Reply #3 - 05/30/13 at 13:59:20	Print Post
	I call Walcks today....I better double check the replacement intake manifold first....

	1955 CJ-5, A friend for 55 years....1951 CJ-3A, a new addition. 1929 Model A Ford Closed Cab Pickup...
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Quebec Jeep YaBB Administrator Owner Member 2012 2016 Sponsor Member 2015 Sponsor Member Offline CJ-3A 1950 Posts: 1192 Location: Quebec, Canada Joined: 06/16/12 Gender:	Re: Cracked Exhaust Manifold.. Reply #4 - 05/30/13 at 15:07:51	Print Post
	It's a big crack. For a smaller one I would try to weld it.

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1955CJ-5 Flatfender Master 2013 Sponsor Member 2016 Sponsor Member 2015 Sponsor Member Offline It wasn't always green.... Posts: 2338 Location: Boise, idaho Joined: 12/18/12 Gender:	Re: Cracked Exhaust Manifold.. Reply #5 - 05/30/13 at 17:21:29	Print Post
	Well, now I have a cracked intake manifold, a cracked Supersonic head, and a cracked exhaust manifold...all I need is a cracked block It is a big crack....and it looks as though it's been there a very long time.

	1955 CJ-5, A friend for 55 years....1951 CJ-3A, a new addition. 1929 Model A Ford Closed Cab Pickup...
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CJPilot Flatfender Enthusiast Owner Member 2012 Offline Shade Tree Mechanic Posts: 177 Location: Central Mass Joined: 04/05/12 Gender:	Re: Cracked Exhaust Manifold.. Reply #6 - 05/30/13 at 23:12:07	Print Post
	I know lots of folks weld/ / braze cast iron heads , manifolds etc. But if you are serious about fixing a cast iron part you really should look at this http://www.locknstitch.com/. There are several places that do it this way Best of Luck Steve


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1955CJ-5 Flatfender Master 2013 Sponsor Member 2016 Sponsor Member 2015 Sponsor Member Offline It wasn't always green.... Posts: 2338 Location: Boise, idaho Joined: 12/18/12 Gender:	Re: Cracked Exhaust Manifold.. Reply #7 - 05/30/13 at 23:59:59	Print Post
	Thanks Steve, I read most of their info...i think i'll send them a picture of the cracked Supersonic head and see what they say...I have a pic with the magnaflux magnets showing the crack.. I did get another quote from Midwest Cylinder head...$350..so it isn't cheap!

	P1050191.JPG ( 206 KB \| 51 Downloads ) 1955 CJ-5, A friend for 55 years....1951 CJ-3A, a new addition. 1929 Model A Ford Closed Cab Pickup...
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CJPilot Flatfender Enthusiast Owner Member 2012 Offline Shade Tree Mechanic Posts: 177 Location: Central Mass Joined: 04/05/12 Gender:	Re: Cracked Exhaust Manifold.. Reply #8 - 05/31/13 at 12:04:17	Print Post
	Here is a link from the Old Willys forum showing an engine block repair. http://www.oldwillysforum.com/forum/showthread.php?2400-47-Engine-rebuild/page5 Steve


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1955CJ-5 Flatfender Master 2013 Sponsor Member 2016 Sponsor Member 2015 Sponsor Member Offline It wasn't always green.... Posts: 2338 Location: Boise, idaho Joined: 12/18/12 Gender:	Re: Cracked Exhaust Manifold.. Reply #9 - 06/01/13 at 00:53:20	Print Post
	Now isn't that interesting......I wonder how a seal is created? And I wonder if it would work inside the combustion chamber? Could one of those studs eventually work itself loose and create havoc?

	1955 CJ-5, A friend for 55 years....1951 CJ-3A, a new addition. 1929 Model A Ford Closed Cab Pickup...
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CJPilot Flatfender Enthusiast Owner Member 2012 Offline Shade Tree Mechanic Posts: 177 Location: Central Mass Joined: 04/05/12 Gender:	Re: Cracked Exhaust Manifold.. Reply #10 - 06/01/13 at 01:19:24	Print Post
	From what I’ve been told this kind of repair has been around for decades. It was originally used in industrial applications and then migrated to the automotive field, specifically older out of production type parts. I have seen heads and blocks that have been repaired this way and I know they are pressure tested afterwards. As a matter of fact I’ve been advised that a 134 block should be pressure tested as a routine check at overhaul. Something about not being able to see (using magnuflux) where they are likely to crack. Steve


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1955CJ-5 Flatfender Master 2013 Sponsor Member 2016 Sponsor Member 2015 Sponsor Member Offline It wasn't always green.... Posts: 2338 Location: Boise, idaho Joined: 12/18/12 Gender:	Re: Cracked Exhaust Manifold.. Reply #11 - 06/01/13 at 01:34:07	Print Post
	Nothing yet from the Locknstitch folks...I'm interested to see what they have to say...

	1955 CJ-5, A friend for 55 years....1951 CJ-3A, a new addition. 1929 Model A Ford Closed Cab Pickup...
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F Bill Flatfender Master Offline Posts: 1395 Location: ???? Joined: 12/02/10 Gender:	Re: Cracked Exhaust Manifold.. Reply #12 - 06/01/13 at 12:41:02	Print Post
	1955CJ-5 wrote on 06/01/13 at 00:53:20: Now isn't that interesting......I wonder how a seal is created? And I wonder if it would work inside the combustion chamber? Could one of those studs eventually work itself loose and create havoc? The studs are somewhat tapered like a pipe plug, and each additional stud is partly drilled into the past one. Loctite is used to seal them, and in some cases they get ground off level with the surface and peened to look like they are all part of the casting. There really is no way for them to loosen up as each stud locks the one next to it. In the link from the old willys forum they also show the crack locks that cross the crack in a specially drilled set of holes. Those are engineering masterpieces. If you ever get the chance to get an info packet from Locknstitch and read it you will be amazed at teh stuff they can fix that way.
	« Last Edit: 06/01/13 at 12:46:47 by F Bill »
	Owner of the world famous?? Pintojeep 3A and one yet to be named stock project 3A. Based in central TX and upstate NY.
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