In a message dated 8/23/01 11:14:03 AM, VW85Westy writes:

<< Are you absolutely sure about this?  I just bought a new one, and it let
me suck air through it easily. >>

Peter,

Unlike others, if I were not certain, I would not have said it.  I guess we
have to define "easily".  But, first, are you sure the valve plate was sealed
to the body of the pressure cap?  If not, blowing and sucking on the cap will
prove nothing.  The cap should relieve system pressure @ 13-17 psi positive
pressure and 0.3-1.45 psi negative pressure.

Rich