Well, repair cylinder heads is what machine shops do.
I still wonder why you are saying 'tempered' .  tapered ? 
Hardened metal in the area of the plugs ?
it's an aluminum casting, there's no hardening or tempering on it anywhere I
don't believe. 

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
David Kao
Sent: Thursday, December 13, 2007 6:27 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: AMC Cylinder Head Question

I checked it for sign of leak very carefully. There was no leak I think.
What I am concerned about is it may become worse once the old plug is
removed the and hole is tempered. A machine shop should be able to take
a good care of it I hope.

David

--- Bob Donalds <donalds1@VERIZON.NET> wrote:

> JB weld
> will not stick to anything but a freshly ground surface can you see it
leak
> ?
> Bob
>
> ----- Original Message -----
> From: "Scott Daniel - Shazam" <scottdaniel@TURBOVANS.COM>
> To: <vanagon@GERRY.VANAGON.COM>
> Sent: Thursday, December 13, 2007 8:42 PM
> Subject: Re: AMC Cylinder Head Question
>
>
> You could also have a machine shop pressure test the heads.
> Or you could put more epoxy on top of what's there, like JB weld.
> A picture would be fun to see.
> I never remove those drain screws.
> Scott
>
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
> Mike Collum
> Sent: Thursday, December 13, 2007 4:35 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Re: AMC Cylinder Head Question
>
> It is said that experience is what you get when you were expecting
> something else.  Well, in that I've never had one of these freeze plugs
> leak, I have no experience so share with you.
>
> Maybe someone like Boston Bob would have replacements or know where to
> get them.
>
> According to ETKA 7, the freeze plug without the drain bolt is "Called"
> Locking Cover # N 011 914 2.
>
> The one with the threads for a bolt is # 025 101 583 A
>
> The seal for a bolt is N 013 830 2
>
> The Allen key head bolt (M8X12) is N 014 706 7
>
> Of course, these are for an OEM head ... but I'm betting they're the
> same on AMC heads.  I found the seal and the bolt listed on BusDepot's
> site but not the freeze plugs (locking covers) themselves.
> >
> > Mike
>
>
> David Kao wrote:
> > Mike, you are probably right. The problem is the other one that has
> > no screw on it. I think it is still in there. But it is covered by
> > the metalic look epoxy (or something else I do not know). It has an
> > aluminum look. But it is plastic. If it does not leak maybe I should
> > not try to fix it.
> >
> > David
> >
> >
> > --- Mike Collum <collum@verizon.net> wrote:
> >
> >> I believe what you're seeing are the freeze plugs.  One isn't actually
> >> held by a screw ... those screws are there to allow draining the heads
> >> of coolant.
> >>
> >> Mike
> >>
> >>
> >>
> >> David Kao wrote:
> >>> I have a pair of used AMC heads pulled from a parts vanagon.
> >>> I am about to begin to rebuild my 84's 1.9 WBXer with these two
> >>> heads. I have a few questions about these heads before I put
> >>> them on.
> >>>
> >>> The heads have two metal caps at the bottom side of them. If you
> >>> look at the heads at their installed position the upper side has
> >>> the intake and spark plug holes. The bottom side has the two metal
> >>> caps, one is held in position by a screw and the other is in there
> >>> by itself.
> >>>
> >>> Well, one the two AMC heads has one cap that is plugged up by
> >>> some kind of epoxy that looked like aluminum. My guess is that the
> >>> original cap leaked and it was repaired. Whoever did the repair
> >>> used the epoxy to plug it up. I can not see if the original cap
> >>> is still in there or not. It seems that it did the job before I
> >>> pulled them off from the parts van. But I am really concerned if
> >>> it will eventually develop a coolant leak that will require
> >>> a tear down of the engine again.
> >>>
> >>> Any suggestions as to how to fix it correctly once for all? Is
> >>> there such metal caps available from anywhere? How is it installed?
> >>> This is the cap that is not held in position by a screw. Should
> >>> I send it to a machine shop to get it re-capped?
> >>>
> >>> BTW, the pair of AMC heads look in very good shape. There is no
> >>> crack, warpage or any visible sign of problems (except the cap).
> >>> I have lapped all the valves and they seem all seal pretty well.
> >>>
> >>> Any help is appreciated.
> >>>
> >>> David
> >>>
> >>>
> >>>
> >>>
>
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