[AT] Hole in exhaust manifold....
Al Jones
aljones at ncfreedom.net
Mon Jan 29 18:52:19 PST 2007
Thanks, George, It's been a while since I had to remember temp. for
brazing, soldering, and so forth. I've never been too good at
brazing--seems like I never got things hot enough to make it flow right.
Just need more practice I guess.
Al
-----Original Message-----
From: at-bounces at lists.antique-tractor.com
[mailto:at-bounces at lists.antique-tractor.com] On Behalf Of George Willer
Sent: Monday, January 29, 2007 7:30 PM
To: 'Antique tractor email discussion group'
Subject: RE: [AT] Hole in exhaust manifold....
Al,
Walt should study more before he offers advice, we know he hasn't brazed
a
manifold. Visible red shows up just a little over 900 F. An engine
with
aluminum pistons would melt down long before the manifold got to 2000
even
with the cooling effect of the incoming charge.
Copper/zinc (brass) melts at different points depending on the alloy.
The
range is from 1300 F to nearly 2000 F. The cast iron itself would melt
at
around 2300 F.
Brazing manifolds isn't for the faint of heart... differential cooling
causes a lot of cracking... It's very difficult to do. Ask me how I
know.
George Willer
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