RE: {Chrysler 300} More on Welding Cast Iron
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

RE: {Chrysler 300} More on Welding Cast Iron



Well, if you watch the video, it is actually more like brazing. Their explanation in the video has me intrigued. If I knew how to stick weld, then I'd be tempted to try it.
 
I was at a show this weekend and the owner of a 59 Plymouth showed me how his exhaust manifold was brazed/welded/whatever with at nickel rod. He said that he had it done about a month ago. I said he should contact me next spring, when he discovers that it cracked again, so I can sell him an unbroken one.
 
Ron


From: John Grady [mailto:jkg@xxxxxxxxxxxxxxxxx]
Sent: Monday, September 19, 2022 9:36 PM
To: Ron Waters
Cc: chrysler 300 club
Subject: Re: {Chrysler 300} More on Welding Cast Iron

You can’t weld cast iron . Why does this stuff keep coming up ? The cooling leaves stress risers . You can braze it maybe . Perhaps these rods are braze . 
Welding means you actually melt the base metal ( cast iron)  — You “weld “ cast iron it cools too fast from melting temp  of iron( white hot ) —-  unless all of it is very near that  cast iron melt temp . When it cools with normal setup even with best preheat your can practically do the metal is left with tremendous stress right next to weld it cracks there  like glass . Cast iron is inherently very brittle like glass due to its structure . 
For same reason hot glass cracks if you put water on it . You can see it , cracks on clear glass — but not in cast iron . One bump or thermal stress  you have a lot of little pieces . 
The duty exhaust manifold sees is very tough , heating very hot , and cooling with one face clamped to block which does not get hotter than 220 . So a lot of force as they expand and cool to different temps , yet clamped by bolts Why they crack in first place ; putting a pre cracked one half glued or pre  cracked back in is a loser . 
Various rods come and go claiming miracles . But some are actually brazing (maybe )— melting an alloy mix onto hot cast iron as a sort of metal glue . Brazing is very strong if it “ takes” to iron , just like solder . But Try soldering aluminum . Like brazing cast iron . 
As far as really doing it right see Stitch and Weld ( I think that is the name -/in California?) 
They heat it almost to melting , white hot and then weld with a cast iron rod in a special furnace they build for the part shape while white  hot . Then a special slow  controlled cooling ; it is like a new all cast iron casting then , all homogenous . 
About 1000$  to fix a manifold . That works they are very successful . If you could do it with a special rod  for 30$ , why would people pay 1000 ? 
Anyway , forewarned is all one can do .. 
jkg 

Sent from my iPhone

On Sep 19, 2022, at 7:19 PM, Ron Waters <ronbo97@xxxxxxxxxxx> wrote:


All -
 
There's a company, Muggy Weld, that shows how to stick weld a cast iron manifold using two of their special rods.

https://www.muggyweld.com/video/weld-exhaust-manifold/
 
Has anyone tried this ?
 
Ron

--
For archives go to http://www.forwardlook.net/300-archive/search.htm#querylang
---
You received this message because you are subscribed to the Google Groups "Chrysler 300 Club International" group.
To unsubscribe from this group and stop receiving emails from it, send an email to chrysler-300-club-international+unsubscribe@xxxxxxxxxxxxxxxx.
To view this discussion on the web visit https://groups.google.com/d/msgid/chrysler-300-club-international/D18E80A3F2BA40339278ED26A3B622BC%40ThinkPadL520.

--
For archives go to http://www.forwardlook.net/300-archive/search.htm#querylang
---
You received this message because you are subscribed to the Google Groups "Chrysler 300 Club International" group.
To unsubscribe from this group and stop receiving emails from it, send an email to chrysler-300-club-international+unsubscribe@xxxxxxxxxxxxxxxx.
To view this discussion on the web visit https://groups.google.com/d/msgid/chrysler-300-club-international/31E971097060497A94130B440EB07803%40ThinkPadL520.


Home Back to the Home of the Forward Look Network Archive Sitemap


Copyright 2018 The Forward Look Network.  All rights reserved.

Opinions expressed in posts reflect the views of their respective authors.