No, . . . not from Yugos.
Thanks for the link. . . .it was very informative and will give me a place to start. I think I'll only need to replace the brittle and leaky hoses, one-by-one under a shade tree. The phantom heater comes on and off at will, etc. I think its from leaks galore!!! I had this problem once before and a hose has become disconnected from a "T". They're all in such bad shape now, and I want this car running correctly without pending repairs before the cold weather hits. Thanks again.