[SEL] Cracked Head

[Judge Tommy Turner]

Eldon,
	That's a good point.  A little heat will make the epoxy suck
into the crack.  But, if a little heat is used then its probably best
not to use the JB Quick formula.  It sets up in about 5 minutes under
normal (75 degree) temps.  Adding heat can make it set almost on
contact.  I've had great luck with JB Weld and if its just a matter of
stopping a seeping crack on the exterior of a cylinder or head, I'd
prefer it over the other choices (welding or brazing).

Tommy Turner
Magnolia, KY



-----Original Message-----
From: sel-bounces at lists.stationary-engine.com
[mailto:sel-bounces at lists.stationary-engine.com] On Behalf Of Elden
DuRand
Sent: Friday, January 23, 2009 4:06 PM
To: The SEL email discussion list
Subject: Re: [SEL] Cracked Head

The only things I would add about JB Weld (or Devcon or Belzona) is to
make sure the surfaces of the Vee'd crack are extra super clean, clean,
clean.

Don't get the edges where you want adhesion too smooth.  You want it a
little rough in order to make a good mechanical bond.

Added insurance would be to warm the head with a torch to drive out any
moisture that's lurking in the grain of the iron.  Apply the epoxy while
the head is around 100 degrees so it will flow into the surface.

Take care - Elden (been there, done that)
http://www.oldengine.org/members/durand 

> -----Original Message-----
> From: sel-bounces at lists.stationary-engine.com
> [mailto:sel-bounces at lists.stationary-engine.com]On
>  Behalf Of john palmer
> Sent: Friday, January 23, 2009 12:09 PM
> To: The SEL email discussion list
> Subject: Re: [SEL] Cracked Head
> 
> 
> 
> We're telling you to JB it Joe. It's great 
> stuff,never had a problem with it in the right 
> situation.


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