Tim,
I have a 85 GL and after driving it from SoCal 1000 miles north
seemed to have gottin a leak on the right head gasket, my tank drains itself
also. My mom was using the incorrect anitfreeze.. Long story short I
looked under my bus to find that the gasket is pressed out of the head.
** new head gaskets yes soon ** my leak happens when its cold and I also
can hear a real low sucking sound coming from the front when I started
it up this morning.. my coolent light has'nt come on and I just keep and
eye on the levels until I have the bucks to have the head gaskets replaced.

waterboxer fun :)