>
> It has a slotted screw valve that has to be opened when refilling the
system
> with coolant. The slotted screw is then closed when the system is full. It
> never directly bleeds air out of the system but it connects both large
> diameter hoses (input and output for lack of a better term--flow and
return?)
> to the crossover metal pipe and I guess lets the air purge into the
expansion
> tank when refilling.
>

Is that why my 'bleeder' valve never let out any coolant?  I have an '85
1.9L WBX.  I thought is was broken, went to the dealer, and after 15 minutes
of explaining I finally showed them the part in their computer.  They said
it is available only as a part of the housing it resides in.  If I remember
correctly they quoted me about $45 for the whole thing.