Jim;
        This part gave out on my wife's 85 about five years ago. If
memory serves me, one of  the passages inside the "H" had a built in
constriction in it.  I am guessing the piece seperates any air in the
coolant, keeping it out of the input to the water pump.

Good Luck and Drive Safely
Ken Lewis
86 Crewcab,60 356
http://Neksiwel.20m.com/

On Sun, 23 Dec 2001 14:36:51 -0800 Jim Arnott <jrasite@EONI.COM> writes:
> Does anyone *know* what the "H" shaped plastic piece that connects
> the
> coolant expansion tank and the engine really does?  Mine has begun
> leaking and we all know that the next step is dropping all the
> coolant
> at the most inopportune moment.  (Like halfway over the pass in a
> blizzard...)
>
> As I understand it the piece is made of unobtainium so the question
> arises, make a new one or eliminate it?
>
> Any and all advise sincerely appreciated...
>
> JimArnott
> List Admin
> WetWesties
>
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