Subject: Re: Repair crack in cast exhaust elbo ( MARINE) ?

From: [email-masked] (James D. Szura)
Date: Fri, 26 Apr 1996 06:00:09 GMT

[email-masked] (REELCOLORS) wrote:

>You're correct, I'm wrong. Its the large cast elbo thats part of the
>cooling system.
>It leaks water.

> It never gets hot enough to burn you. And since the cooling system is a
>open system with no preshure I thought some epoxy would do the trick.

>                                                   Thanks  

>Tom..................

I have wekded several wet exhaust manifolds over the years with
varying success. 

The other posts are pretty accurate. Try heating the elbow in a bath
of hot sand, 350-400 F. Use nickle rod.  Peen often. Cool very slow.

Also Brazing has worked.

The problem comes because the inner pipe restrains the weld from
shrinking, thus causing cracks.

Good luck, you'll need it.

---

From: [email-masked] (Norbert Senf)
Date: Sat, 27 Apr 1996 19:31:12 GMT

On Fri, 26 Apr 1996 06:00:09 GMT, [email-masked] (James D. Szura)

>Good luck, you'll need it.
I prefer GE silicone rubber(clear, smells like vinegar, available at
Costco) for those tricky situations where nothing else works. Its
advertised as good to 400F but is in fact good to 600F. Silicone isn't
crazy about petroleum solvents, but nothing else seems to bother it.
It remains permanently flexible. When I had to glue some epoxy
castings to an aluminum pattern, I tried everthing, and silicone was
the only thing that worked. The space shuttle has its tiles glued on
with it.
========================================================
Norbert Senf			email 	[email-masked]
Masonry Stove Builders		fax 	819 647 6082
RR 5 Shawville Québec J0X 2Y0	voice 	819 647 5092
========================================================
>>> VISIT OUR NEW WEBSITE AT http://mha-net.org/msb  <<<

========================================================