[T3] Heater hose

[Mike Fisher]

www.aircraftspruce.com sells all different sizes of ducting.  I used some
on an EMPI header to heater boxes hoses.

On Tue, Nov 20, 2012 at 7:33 AM, Jim Adney <jadney at vwtype3.org> wrote:

> On 19 Nov 2012 at 23:12, Soren Jacobsen wrote:
>
> > On Nov 19, 2012, at 8:46 PM, Jim Adney <jadney at vwtype3.org> wrote:
>
> > > 60/60 mm is the right diameter for us, but I don't think the beetle
> > > lengths will work for Type 3s.
> >
> > Actually, 65/65mm is the correct diameter for early-1964-and-on T3s.
> > I know because I've practically memorized the parts book entry for a
> > heater tube that I need (311 255 357D, left side 65mm heater tube used
> > November 63 through October 1964).  I don't know what size the earlier
> > cars used, but I'm certain they're smaller.
>
> That's interesting. The 60/60 diameter is what the later cars, the
> ones with the air control valve in the heat exchanger, require. I had
> no idea that earlier cars were larger.
>
> That dimension is the OD of the pipes the hoses have to fit on, or
> the ~ID of the hoses.
>
> Okay, now I've checked the microfilm, and, sure enough, it calls out
> "flexible pipe, 65 mm" for all those hoses. There are 2 different
> lefts (for different ranges of years) but just one right, all 65 mm.
> Anyone know why the lefts changed but the rights didn't?
>
> But, I just went down and confirmed that a late heat exchanger
> measures just under 60 mm (~2-3/8") OD. So now I believe that ALL the
> heat exchangers and mixer boxes came with 60 mm OD inlet/outlet
> tubes.
>
> So, I'm concluding that the 65 mm that the microfilm calls out must
> be the OD of the flexible tube rather than the ID! It's the ID that
> we're really interested in. I've looked for a source for this
> material, but haven't found anything really suitable yet.
>
> So, the 60/60 beetle part is the one to look at, since Airhead parts
> is careful to point out that this is the ID of their connecting hose.
>
> --
> *******************************
> Jim Adney, jadney at vwtype3.org
> Madison, Wisconsin, USA
> *******************************
>
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