Radiator overflow hose/nipple - what's it for?

[Dave C]

At 12:25 AM 7/24/2002 -0400, Huw Powell wrote:
>the 4kq has the little top hose as well.  it is a circuit.  coolant
>flows into the exp. tank via the little hose, and drains back into the
>radiator via the larger, lower hose.  Whatever you do, don't block it.

OK!
I no longer have a 4kq to look at so I was going on memory.  I'll keep the
vent.
thanks,
Dave C.