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On 10 Dec 97, Toby Basiliko wrote:
> Unless,
> it's a vacuum hose!
> Toby B
>
> Melissa & Jim wrote:
> > The only hoses you need to replace regularly are the ones that gas
> > flows in. The others are necessary, but the old hose there seldom
> > causes problems, and the problems it causes are never serious.
I realized after I read this response that my comment had been based
on FI T3s. Carburated cars are an entirely different matter and are
much more sensitive to vacuum leaks.
As for FI cars, I see lots of them that come to me with hose clamps
on every hose end in sight. I have NEVER seen a case where this was
either necessary or important. I believe this is just a sign of
someone face with a problem they didn't understand and trying to fix
it through concepts that they DID understand. These cars invariably
still have problems, and they are often hard to figure out and fix.
The hose clamps, however, accomplished nothing except to make it
harder to service while sometimes damaging the hose.
Yes, the vacuum hoses need to be there and doing their job, but the
conductance through the line always overwhelms any small leaks that
may exist in the hoses. I do see vacuum leaks in pressure sensors,
and sometimes these MAY make a difference. Broken vacuum advance
diaphrams are common and these completely disable the vacuum advance
and must be replaced. Of course if one end of a hose is so bad that
will not stay in place and falls off then that can cause a problem,
depending on which hose it is.
BTW, speaking of hoses, does anyone know if the larger diameter RED
hose that was used in 72-3 T3s for the crankcase ventilation system
is available anywhere? I would like to replace some of this since
the ends that attach to the air cleaner always deteriorate and they
were too short from the start so there is no excess which one can
trim and restore the end.
Jim
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Melissa Kepner Jim Adney
Laura Kepner-Adney
jadney@vwtype3.org
Madison, Wisconsin
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