ABA block and crank ?'s ...Update

[deadbolt at mindspring.com (S. Coleman)]

After more inspection I really think that these blue heat marks are actually
from the grinding process when the rod journals were ground at the factory.
(or wherever it is done)  I can't see heat treating these rod journal ends
.....
just my thoughts

Lastly,....VW has most likely used some sort of epoxy coating on these
Mexican blocks.... cause I can't find a paint remover yet that will even
loosen this stuff.
Chris
----- Original Message -----
From: "David Utley" <mr.utility@highstream.net>
To: "Ron Pieper" <rapieper@yahoo.com>
Cc: "S. Coleman" <deadbolt@mindspring.com>; "Scirocco List"
<scirocco-l@scirocco.org>
Sent: Friday, January 30, 2004 9:57 AM
Subject: Re: ABA block and crank ?'s


> The blue finish is heat treatment...  Even if the engine was revving at 6K
for
> 15 minutes without oil, it would not go blue...  I have seen enough
torched
> engine internals to know.  I also have never seen the blue that you refer
to
> on a VW crank, but I do not doubt that they would have done this, at least
on
> some...
>
> My 0.02
> --
> Regards,
> David Utley
> -----------
> Cable Volkswagen
> 405-470-3129
> 1-800-522-6793
>
>
> Quoting Ron Pieper <rapieper@yahoo.com>:
>
> >
> > --- "S. Coleman" <deadbolt@mindspring.com> wrote:
> > > ...they have some blue-ish marks on
> > > them like they were heat treated maybe.....  any ideas.   (I also
wonder
> > if
> > > they were "heated" while the car was running?)
> >
> > There should be no blue marks - that indicates excessive heat, and you
can
> > bet that the marks
> > weren't there from the factory.
> >
> > > Lastly, can someone confirm what the difference in looks (as in
> > > what to look for) is between a forged crank and a cast crank.  My boss
and
> > I
> > > are arguing that fact as well as why one is stronger than the other.
> >
> > In general terms, the cast crank will have a part line that is thin.
The
> > forged cranks part line
> > will be thicker, maybe 1/4" or a little more.
> >
> > =====
> > Cheapass Ron
> > '81 Scirocco S - "Victor Jr."  7SM
> > (2.0L 16V, GL 4-speed w/ Quaife installed, Megasquirt coming...)
> >
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