need help identifying coolant fitting on 16V

[sciroccos at earthlink.net (Jim Ruffi)]

>-----Original Message-----
>From: C Boyko [mailto:roccit_53@scirocco.cs.uoguelph.ca]
>
>So is that "bypass hose" important? No idea...
>
>Cathy


I'm very adaptable...now I'm bottom-posting.
Thinking about it, I would guess the small bypass pipe is there to provide
extra coolant circulation through the head when the heater valve is shut
off.  Maybe the cars that are designed without the bypass don't use a
coolant shutoff, but the heat control is accomplished using flaps only (like
many domestic cars)?  This would make sense to me but I've never seen a VW
without a heater valve that I recall.  Do your single-outlet pipe cars have
valves and cables?

Without the valve, the heater core would stay hot always and allow coolant
to flow, thus providing extra cooling capacity and (once again), no need for
the bypass....
???
I have to check my car out, but my truck, boat and Scirocco are currently
stacked like cordwood in the garage....I'll look at it later..maybe my car
has the heater valve removed???  I do recall seeing a piece of copper
plumbing pipe joining the head-side heater hose to the one from the
firewall, but just thought that was an improvised replacement for a
crapped-out (plastic?) VW coupling.

Why couldn't I find a diagram in the Bentley for this?  I fell asleep with
the Mars reddish book on my chest last night, as I was going through
page-by-page, trying to find a picture or something.

Jim>
>