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DaveWisc. 
Orange Level
Joined: 11 Oct 2009
Location: Wisc.
Points: 963
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 Topic: B exhaust
Posted: 30 Oct 2022 at 7:27pm |
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Can a exhaust be welded broke a front piece?
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steve(ill)
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Joined: 11 Sep 2009
Location: illinois
Points: 78002
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Posted: 30 Oct 2022 at 8:37pm |
you can try... Cast iron does not weld good to start with... when its 70 years old you have a lot of carbon and not much iron left.... I have repair the front or rear EARS on a couple with some luck.... Not much luck with cracks / rust out in the center port areas.
clean it real good... then clean it again...grind a bevel on both parts.. clamp them together in alignment.. heat with a propane torch to 250 degrees in the area an inch around the weld.......... i use 7018 DC stick on everything.. One short pass, then chip with hammer to get the flux off and releave stress .... after 1 minute, do another short pass or buildup... dont weave the rod, just do short beads.
Edited by steve(ill) - 30 Oct 2022 at 8:40pm
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Like them all, but love the "B"s.
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DaveWisc.
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Joined: 11 Oct 2009
Location: Wisc.
Points: 963
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Posted: 30 Oct 2022 at 8:46pm |
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Maybe easier to buy used one
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steve(ill)
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Joined: 11 Sep 2009
Location: illinois
Points: 78002
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Posted: 30 Oct 2022 at 9:02pm |
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yes.. if you have the time and expertise its worth a try.. If your going to pay someone to weld it, FORGET IT..
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Like them all, but love the "B"s.
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1939Dodge
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Joined: 18 Jan 2014
Location: Pa.
Points: 553
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Posted: 31 Oct 2022 at 7:46am |
7018 will wreck the parts. Preheat, use a nickel rod. Or BETTER, braze it with a brass rod and torch. It’s much easier on the iron parts and will prevent carbon from Migrating into the grain boundaries
Edited by 1939Dodge - 31 Oct 2022 at 7:48am
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IBWD MIke
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Joined: 08 Apr 2012
Location: Newton Ia.
Points: 3474
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Posted: 31 Oct 2022 at 7:51am |
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As Steve says, cast iron is tricky to weld under the best circumstances. After 70 years of heat-cycling, probably near impossible. There are new ones out there, that's the way I've gone. Both of my CA's where new manifolds.
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DSeries4
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Joined: 12 Sep 2009
Location: Ontario, Canada
Points: 7205
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Posted: 31 Oct 2022 at 10:12am |
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Better off getting a good used one. There should be millions of them out there.
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'49 G, '54 WD45, '55 CA, '56 WD45D, '57 WD45, '58 D14, '59 D14, '60 D14, '61 D15D, '66 D15II, '66 D21II, '67 D17IV, '67 D17IVD, '67 190XTD, '73 620, '76 185, '77 175, '84 8030, '85 6080
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HoughMade
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Joined: 22 Sep 2017
Location: Valparaiso, IN
Points: 691
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Posted: 31 Oct 2022 at 11:08am |
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I have a new one from Steiner. High quality piece.
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1951 B
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