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10-04-2016, 12:50 AM | #1 |
Member
Join Date: Jul 2010
Posts: 99
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crack in block
After fighting to get this block apart and sandblasted and when I magnafluxed it I found a crack in the inlet port in the valve chamber I don't know if it will leak when hot or if it can be fixed whithout welding or not any ideas I don't want to scrap this after work ?
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10-04-2016, 01:34 AM | #2 |
Senior Member
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Re: crack in block
Stitching.
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10-04-2016, 03:34 AM | #3 |
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Join Date: May 2012
Location: inside your RAM
Posts: 3,134
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Re: crack in block
A or B
that will make all the difference
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'31 180A |
10-04-2016, 11:17 AM | #4 |
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Join Date: Dec 2011
Location: SW Idaho
Posts: 970
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Re: crack in block
Access is everything when stitching a crack. Drilling, tapping inserting. Afterwards, pressure testing and hot Ceramic Seal treatment from Irontite is your insurance if you can find someone with the setup to do it. Step one: let the shop that is locally recommended, view the crack and see what they say. The second option would be furnace welding/brazing and is very much a specialty, not usually available locally. The chosen auto machine shop who says it can't be stitched might know where there is a casting repair facility for the weld job. After a welding repair, the pressure testing is still a must do. Sometimes things do escalate into rocket science. Also, if it comes to casting repair in the oven overnight, the babbitt will be removed.
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10-04-2016, 04:43 AM | #5 |
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Location: Michigan / Ontario border, Sarnia, Ontario. 50 miles from Detroit and 150 from Toronto.
Posts: 5,800
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Re: crack in block
I had an A block stitched 5 years ago and I have never had a problem. Wayne
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10-04-2016, 12:46 PM | #6 |
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Join Date: Jul 2010
Posts: 99
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Re: crack in block
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10-04-2016, 01:45 PM | #7 |
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Join Date: May 2010
Location: OKC / Tonkawa, Ok.
Posts: 1,977
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Re: crack in block
Check out Tod Buttermore's new cast block might be the best solution.
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10-04-2016, 03:46 PM | #8 |
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Join Date: Dec 2010
Location: FRESNO, CA
Posts: 12,560
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Re: crack in block
Don't trust a CRACKED block, except for a boat ANCHOR!
Captain Bill W.
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10-05-2016, 08:34 AM | #9 | |
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Join Date: Oct 2010
Location: 40 Mt.Vickery Rd. Southborough,MA 508-460-0733
Posts: 352
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Re: crack in block
Quote:
it is a stress free/permanent way of doing crack repair rather than welding or JB weld. Dealing with engines from the Northeast and around the world, almost every engine has some form of crack repairs needed to make it whole again. I have enclosed a few pictures showing examples. http://www.jandm-machine.com/metalStitching.html |
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10-05-2016, 12:56 PM | #10 |
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Join Date: May 2010
Location: Didsbury Alberta
Posts: 838
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Re: crack in block
If you cannot find a perfect replacement block......metal locking is the way to go. I have seen very large stationary engine blocks and other components, that required stitching and metal locking before the various factory machining procedures commenced.
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