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Re: [T3] ZZZZZZZippp



Subject: Re: [T3] ZZZZZZZippp


> On 7 Mar 2001, at 23:39, Steven Ayres wrote:
>
> > Sorry, this is a well debunked myth that we've been through at least a
> > couple of times before on this list. Lead in fuel has no appreciable
effect
> > on normally operated engines other than to slowly poison us and our
> > neighbors. It was snake oil in the days, just as lead substitutes are
snake
> > oils today.
>
> A lot of old water cooled cars with cast iron heads have the valve
> guides and seats machined right into the head. I am under the
> impression that these heads will wear dramatically without lead in
> the gas. These heads can be upgraded to pressed-in bronze guides and
> hardened seats, but this is a significant expense.
>
> Fortunately these features have been part of the VW head construction
> from the beginning.
>
> There was concern in the early days that VWs would suffer from lack
> of lead, but this has certainly been debunked.
>
> -
Ahhhh, another point to bring up..... VW did change their valve seats in I
think '68. The exhaust seats were changed to "Stelite" <sp>. This was about
the time that leaded gas was going away. It was also at this time that
cylinder temperatures started rising due to the leaner emission standards.

Russ Wolfe
russw@classicvw.org
http://www.classicvw.org/


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