gjwolfe at telus.net
Sat Feb 26 18:48:12 EST 2005
Maybe this is the the same thing as in woodworking with scrapers... creates
a bit of a burr on one side, removes an extremely thin shaving... much finer
than a plane would even remove.
----- Original Message -----
From: "Erik Lane" <erikjlane at yahoo.com>
To: <vwdiesel at audifans.com>
Sent: Saturday, February 26, 2005 12:22
Subject: Re: [Vwdiesel] Headgasket--Solvents
> One neat bodyman's trick is to bend the razor's blade edge
> a bit. Take it to a piece of glass and flex the blade up
> against it a few times on one side only. You won't be able
> to see the difference on the blade but it will make a HUGE
> difference with how it bites. It won't dig into the metal
> on the one side, but if you have it where the very edge
> curls downwards, then it will bite really hard. (I guess if
> you use a microscope you might be able to see the
> If you do that and then use it carefully you can even
> remove stuff from the top of a painted surface without
> damaging the paint. It takes patience and a steady hand,
> tho. And it HAS to be a new blade.
> I guess it might not matter that much on the iron block,
> but on the aluminum head I would be at least a bit careful.
> --- SLATERSFB at aol.com wrote:
> > I use one of those small stainless steel wire brushes
> > with plastic handle &
> > brake cleaner or carb cleaner. Leaves sort of swirly
> > finish which I figured
> > would crush microscopically to conform to gasket. Look
> > under microscope at
> > brushed surface - looks like mountains & valleys.
> > Bob in NY
> > ***********************
> > > Use whatever you can find, and clean it well.
> > > I actually CAREFULLY, shaved the head with a single
> > edge razor blade in one
> > > of those blade holders used to de-paint window glass.
> > To get some of the
> > > nasty gasket crap off.
> > Some rebuilders are going for "ground" heads, which
> > look like a
> > heavy bead blasting. This surface "bites" into the
> > head
> > gasket, and prevents burnishing of the gasket
> > surface. The
> > burnishing is thought to contribute to head gasket
> > failure,
> > by creating a smoother, sliding surface.
> > Check with the recommendations of the provider of
> > your head
> > gasket. THe manufacturers don't want to say that
> > their gasket
> > won't work on a certain surface, but in seminars,
> > some are
> > recommending head surfaces machined a certain way.
> > Having said all that, every cylinder head gasket I've
> > installed
> > on a VW cyl head, has been with the smooth surface,
> > or a lightly
> > reground surface, with appears almost mirror smooth
> > (if that's
> > possible with Al). The one I'm doing this spring
> > will be done
> > the "new" way.
> > Recent gasser cyl heads have been the "new" way, and
> > without
> > near-term failures. The gasket manufacturers claim
> > that the rough
> > surface prep is more critical in a diesel gasket.
> > One manufacturer
> > rep indicated that the majority of gasket "failure"
> > complaints
> > they get are on diesels, which account for less than
> > 6% of their
> > sales.
> > > BE SURE to vacuum the bolt holes after cleaning to
> > remove crud and solvent
> > > that fell in.
> > > I Highly recommend 2 or 3 rinses of the bolt holes with
> > solvent, and
> > > chasing the threads with an old bolt with a slot cut
> > down the side like a
> > > tap.
> > Also consider cutting an "X" in the tip of the bolt,
> > to help
> > loosen up stuff that collects in the bottom of bolt
> > holes.
> > Brake cleaner, and the straw that comes with the can,
> > are
> > great things. Compressed air is really pretty handy
> > as well.
> > >
> > > I had crud in the bottom of a couple of the holes in
> > mine that I had to
> > > scrape loose with a screwdriver. Then more rinsing with
> > solvent till clear.
> > >
> > > As my wife the nurse would say, "enema until clear"
> > :^)
> > Scary.
> > Val
> > >
> > > Sandy
> > > -____
> > >
> > > Much too much information...
> > > LOL!
> > >
> > > -James
> > >
> > _______________________________________________
> > Vwdiesel mailing list
> > Vwdiesel at vwfans.com
> > http://www.audifans.com/mailman/listinfo/vwdiesel
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