The pressure cap is the obvious thing to check.  Or just replace it.

Larry A.

Mervyn Readman wrote:
>  It all started two weeks ago when I was leaving Athen's Ga for the three
> hour ride home. I had been driving in town for a while when I stopped for
> gas.When I opened the door to get out I hear a hissing and look on the ground to see
> approx. 3 gal of anti freeze heading down the parking lot. I look under to
> find a large hose completely off. After looking around some more I see also the
> cap says for flushing also blown off. I replaced all the hoses and drove home
> with no problems wondering what would cause pressures to blow them off.  Made
> it home and have been driving the van for a couple of weeks when another hose
> started to forcefuly leak out coolant and I could see it was under great
> pressure.
>  What could be causing this? Is it the cap not releasing pressure?I thought I
> had bled it well but could air in the lines cause this? I don't smell any
> exhaust fumes. Van seems to run well. Heat works. Does not over heat.Did great
> for probably 400 miles. Anyone have any ideas?       Merv
>