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Re: JB Welded Nuts - awe nuts!
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Pete Serrino
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Oct 26, 2009 12:49 PST
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This was a common repair item on Norton heads. Most of the repair shops
made their own inserts out of aluminum tubing. The ID of the tube was
threaded, then the head was bored for an interference fit for the tube.
Others made it a press fit and then welded the insert into the head. I
am not familiar enough with Eldo heads to know if there is enough extra
material around the exhaust port to do this though.
Pete
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Hi Roy
The only genuine fix I have heard of for this problem was from
Moto International
many years ago. I believe they welded up the affected threads and
re-tapped them with
a custom tap they had made. That way you can buy a stock exhaust nut
anywhere and it
will work. Probably not cheap, but worth doing on a '74 Police bike.
There's no guarantee
that a used set of Eldo or Tonti heads wouldn't have some other,
expensive to repair, problem.
If your heads are otherwise good, give MI a call.
Charley Cole
ZYDECO RACING <http://www.zydecoracing.com/home.html>
Roy Harvey wrote:
| | Awe Nuts! My New to me Eldo ('74 LAPD 850), had an obvious exhaust
leak on the right hand side. So, being a good host I bought new
exhaust copper gaskets and went in to fix it. Couldn't get the
exhaust nut off. Rode bike till hot and tried harder and it finally
broke loose and started coming off, but bits of whitish stuff
crumbled off as the nut came loose. Surprise, the PO had JB welded
the exhaust nut in the head. Now What To Do?? Yes, the threads on
both the head and the nut are worn down beyond use. I'm told I could
upgrade to T3 heads, but I'd sorta like to fix the originals. I've
heard fixing the originals is very expensive, and I sure don't want
to pour more money into if there is another way to fix it. Has
anyone made a tap and die with replacement oversize nut??
Anybody know of other options I might have to fix this??
TIA (thanks in advance)
Roy
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