Date: Tue, 18 Jan 2005 13:14:05 -0600
Reply-To: Stan Wilder <wilden1-1@SBCGLOBAL.NET>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Stan Wilder <wilden1-1@SBCGLOBAL.NET>
Subject: Re: Head treatment for pitting--flattening technique
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Why wouldn't you want to just weld up the pits and have the head flycut for
proper sealing surface at the barrels.
That JB patch is just half fast way to be doing the job a second time.
An then there is the potential that you heads have reached EOL and should be
replaced.
Stan Wilder
Engine Ceramics
214-352-4931
www.engineceramics.com
----- Original Message -----
From: "Daryl Christensen" <aatransaxle@DIRECWAY.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Tuesday, January 18, 2005 11:34 AM
Subject: Re: Head treatment for pitting--flattening technique
> The shop I was at for years used the JB trick on many since the mid 90's
on
> vans whoose owners were fiscally challenged...Works slick for long periods
> of time....One I know of ran another 75K before we lost track of it...JB
> wont pit or corrode. Daryl
> ----- Original Message -----
> From: "Robert Fisher" <refisher@MCHSI.COM>
> To: <vanagon@GERRY.VANAGON.COM>
> Sent: Monday, January 17, 2005 12:15 PM
> Subject: Re: Head treatment for pitting--flattening technique
>
>
> >I wound up doing the JB thing to my pitted heads after the machine shop
had
> > taken them apart and thoroughly cleaned them; I sanded them down as best
I
> > could with a block, mainly looking for bubbles (holes), etc. Everything
> > looked pretty good, but I knew I didn't have it perfectly flush, so when
I
> > took the heads back to the shop to have them finished, they shaved the
> > mating surfaces slightly to get them flat. Now they understood about the
> > cylinder clearances and all that, so they just took off some very slight
> > fraction of an inch (don't remember exactly, might have been 1/100ths).
> > They
> > figured that the gaskets and such probably had more give than what they
> > took
> > off. Didn't seem to have any effect at all on reassembly or running;
that
> > was probably 12,000 miles ago or more and all is well so far, assuming I
> > didn't just jinx myself.
> >
> > Probably something you wouldn't be able to get away with more than once
> > but
> > it seemed to be effective.
> >
> > Cya,
> > Robert
> >
> > ----- Original Message -----
> > From: "Jim Felder" <felder@KNOLOGY.NET>
> > To: <vanagon@GERRY.VANAGON.COM>
> > Sent: Monday, January 17, 2005 7:50 AM
> > Subject: Head treatment for pitting--flattening technique
> >
> >
> >> I'm slogging through head replacement and have tried a technique that,
> >> while I can't say it's worked out well because I haven't run the car,
> >> seems worthy of mention for others contemplating the same procedure.
> >>
> >> I had the heads cleaned, then dremeled out the corrosion to leave
> >> bright, shiny pits and filled them with JB weld. Cured overnight. Then
> >> I spray-glued 100 grit sandpaper to 3/4 inch smooth plywood, mounted
> >> the sanding surface on a table, and sanded the head in a circular
> >> motion until all was perfectly--and I do mean perfectly--flat.
> >>
> >> I have pictures of procedure and results if anyone is interested.
> >> Everyone may do this, I don't know. But it saved me a couple of trips
> >> to the machine shop and went really quickly. I tried it wet and dry,
> >> both have advantages/disadvantages. I'd just do dry next time.
> >>
> >> Jim
> >
>
>
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