What is this part?

[Huw Powell]

> Can anyone identify this part for me - it is the one with the two
> water hoses connected to it, and the vacuum tube(?) coming out the
> top... 

That is your heater valve.  It controls the flow of coolant through the 
heater core.  The climate control system actuates it via that vacuum hose.

> http://xs.to/xs.php?h=xs27&d=05184&f=AudiPart01.jpg
> http://xs.to/xs.php?h=xs27&d=05184&f=AudiPart02.jpg
> http://xs.to/xs.php?h=xs27&d=05184&f=AudiPart03.jpg
> http://xs.to/xs.php?h=xs27&d=05184&f=AudiPart04.jpg

-- 
Huw Powell

http://www.humanspeakers.com/audi

http://www.humanthoughts.org/