Today I have a new hope about the problem with my van, the gases in the
cooling system. A friend of mine, who owns a 1991 red Carat, was having the
same problem, right after having the heads replaced, and about the same time
that mine started. He took it back to the guy who had just worked on the
van, thinking there was something wrong with the work. So it goes, that
looking for the cause, somebody mentioned that the radiator might be causing
the problem. Having little to loose, my friend had yhe radiator cleaned, and
the thing is working great. Lower temps, no gas bubbles, no overfilling. I'm
going to try that as soon as I get some vaction days, because it makes
sense, all the crud going to the refill tank, and the problem is not there
all the time. So there might some hope yet, before disassembling the heads.
this guy's van is high mileage, and so is my 1991 Carat, and the heads on
mine where worked on not too long ago. Hope this help some of you with this
headache.

Hector