a real vacuum leak this time!!!!

[Jim H Fielding <bonhoffer@xxxxxxxx>]

You can bypass the check valve by just connnecting the two vacume lines
together and it will put some function back in the Auto TempII.  The can
is a vacume reserve that holds the various doors and baffles in the
ductwork in the proper positions at times when engine vacume is too low
to do it.  Without the can & check valve but with vacume spliced directly
into the system,  the doors will go to the right positions at idle but
will want to go back to their resting state under acceleration due to
lower engine vacume. That means cold air will flow at idle and it will
dump to hot air under acceleraton.  It ain't fun jury-rigging it like
that but as a temporary fix until you locate the right can and/or valve,
it beats no air at all.

If originality is not a major issue, most American auto makers  used this
kind of setup during the 70's & 80's.  Some (which I won't menton by
name) used what looked exactly like a Hi-C fruit punch can with a check
valve.   

If you absolutely can't find the right one for your Imperial, a workable
but non-original substitute from another make ought to be available.  You
could also buy a can of Hi-C Fruit Punch, bore two holes in it, empty &
wash it out   and put two fitings in it for use with a generic in-line
check valve.  I know it sounds sick but it will work.

Good luck.



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