16V coolant piping WAS: 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]
>Sent: Tuesday, May 03, 2005 6:55 AM
>To: Jim Ruffi
>Cc: scirocco-l@scirocco.org; roccit_53@scirocco.cs.uoguelph.ca
>Subject: RE: need help identifying coolant fitting on 16V
>
>>
>Anyway, I went to examine the various <gasp> 8Vs we have around here, and
>it MAY be that you have an <bigger gasp> 8V part in there. Or two. Anyway,
>the Cabby (JH) and Klaus (modded JH) have that single outlet plastic
>version, it hooks up to a hose that runs towards the firewall (I'm saying
>heater core). The "water pipe" version in those cars has an upfacing nipple
>quite nearby that hooks up to the hose from the bottom of the coolant
>overflow bottle. (Or in Klaus' case, it'a capped as he has no overflow
>bottle, he was born a 1.6) This overflow hose hooks up to a sidefacing
>nipple in the same approximate location on the pipe in the 16V version. And
>on my 80 parts car, there is a completely different two spout aluminum
>version, we'll call it version C, and don't even ask about the "special
>custom plumbing" on that one, it's probably from a Jaguar or something. I
>won't be able to look a the Passat in detail till tomorrow, todays's my
>"work two jobs" day.
>
>So is that "bypass hose" important? No idea...
>

Pulled my car out and looked it over...seems the PO replaced the tee, the
water pipe and some hoses.  Here are the facts:

1.	My pipe only has one tee, which is connected to the expansion tank via a
curvy hose.  This is the tee which connects to the upward-facing nipple on
Dan's photo and in your description.  It's near the original distributor
hole on the block
2.	The pipe outlet does connect to the through-firewall hose via the heater
valve..the other end to the middle water pump fitting.

My conclusion:
I need to re-replace the water pipe with the two-tee version; that 2nd tee
connects to the 2nd fitting on the nipple to allow water to continue to flow
through the head when the heater valve is shut off.

I will then need the replace (at least) the expansion tank hose with the
proper (shorter) one.

I don't fully understand why the PO made this change....would anyone wager a
guess?

Jim