Date: Sat, 23 Aug 2008 09:14:44 -0500
Reply-To: Jim Felder <jim.felder@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Jim Felder <jim.felder@GMAIL.COM>
Subject: Re: Engine Replacement or Gasket Fix?
In-Reply-To: <527311A6877746008ACDCA03C62DEE44@DADSTOSHIBA>
Content-Type: text/plain; charset=ISO-8859-1
Dennis,
I considered replacing the studs on my recent rebuild. I ended up
using another block with no evidence of overheating. The main reason I
didn't replace the studs (besides the cost) was the fact that they are
so hard I couldn't grab them to remove them. Is there some trick, like
welding on a nut, that I overlooked? How do you normally get them out?
Jim
On Sat, Aug 23, 2008 at 8:30 AM, Dennis Haynes <d23haynes57@hotmail.com> wrote:
> Both of those internal compression leaks were due to the studs failing to
> maintain tension. If the new heads were bad, they would have leaked
> immediately. All of the internal leaks where the cylinder meets the heads
> start out as head stud tension failure. Sometimes this can be corrected by
> re-tourqing the heads but if the studs are stretching the problem will
> return. Once the internal leak begins it will get worse as the gasket
> begins to burn away from the gasses being forced past it. Just think, new
> studs and nuts with that first replacement could have saved $5k.
>
> Dennis
>
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
> Walter Houle
> Sent: Friday, August 22, 2008 7:33 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Re: Engine Replacement or Gasket Fix?
>
> Robert -
>
> Having been thru a couple of head swaps in the past, I went through my
> records to see what could be learned.
>
> The original heads lasted approx. 8 years and 100,000 miles. They corroded
> at the water gasket and leaked coolant. I then purchased a set of new
> heads and installed them myself. Total cost for the parts was $1,000. They
> lasted 3 years and 32,000 miles. Then, they failed due to a compression
> leak that pressurized the cooling system and caused overheating. A local
> mechanic told me they failed because they were of poor quality & fit and
> recommended a different brand. If my memory serves me right the 1st set of
> replacement heads were made in Spain, and the 2nd set he recommended were
> from Germany. So, I hired him to install the German heads. Total cost was
> $1,900. These heads worked fine for another 2 yrs 9 months and 22,000
> miles before they too failed with another compression leak. At this point,
> I decided to have a factory rebuilt engine installed. This cost $3,300,
> but it has gone 10 years and 50,000 miles and it is still going strong.
> Also, FWIW, the factory motor was found to have a leaky head when it was
> first fired up, a tiny pin hole sized leak near the exhaust flange. VW
> warrantied it, and it was replaced by a local dealership free of charge
> after about a two month wait.
>
> So, my replacement heads weren't exactly cheap, but they did buy me a few
> years each time. The engine swap cost more, but it did come with a
> warranty and it has proven to be very reliable. If I had known about this
> list 10 to 12 years ago I'm sure I would have done things differently.
> Whatever you decide, go with experience, either in the advice from the
> list or with an experienced mechanic, and only use known quality parts.
>
> Walter
> 85 Vanagon
>
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